TY - JOUR A1 - Kramer, Kevin T1 - Water wheels for energy recovery in the outlet of wastewater treatment plants - Using the example of the water wheel at the Warendorf central wastewater treatment plant JF - Educational Journal of Renewable Energy Short Reviews N2 - The annual wastewater flow that is treated by public wastewater treatment plants in Germany amounts to approx. 10 ∗ 10^9 m3/a and forms an ”artificial” hydropower potential that can be used for energy generation or recovery. In the context of this paper, energy recovery in the outlet of wastewater treatment plants is examined using the specific example of the water wheel at the Warendorf central wastewater treatment plant. The ”artificial” hydropower potential can be roughly estimated at up to 20 to 105 GWh/a , whereby this is largely dependent on the hydraulic gradient. The strong variance results, among other things, from the findings of the water wheel operation in Warendorf. The decisive aspect here is the differential factor, which describes the deviation between the theoretical and actual energy yield of the water wheel. The factor includes maintenance work, downtimes and insufficient inflows, which are associated with a loss of output. In the case study, the annual energy recovery amounts to approx. 2 % of the annual electricity consumption of the wastewater treatment plant and can be estimated to 23,500 kWh (2022). In the context of the economic analysis, it can be seen that despite the ”low” yield, economic operation is possible if the system is viewed as a long-term investment - payback period of the example is approx. 14,5 years. The 27-year operation (1996 - 2023) of the water wheel at the Warendorf central wastewater treatment plant confirms this and important findings on successful practical operation can be shown in the context of this paper. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_05 KW - energy recovery KW - wastewater treatment plant KW - water wheel KW - potential KW - real example Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176423 SP - 28 EP - 32 ER - TY - CHAP A1 - Mesenhöller, Eva A1 - Jacobs, Steffen A1 - Vennemann, Peter A1 - Hussong, Jeanette T1 - Unsteady Ventilation in a Scaled Room Model with Swirl Ceiling Diffusers T2 - CLIMA 2022 conference N2 - Mechanical ventilation of buildings is generally based on steadily operating systems. This field is well known and established. But, an approach based on time-varied supply flow rates might improve indoor air quality, comfort, and energy consumption. Typical time-scales of the variation are in the order of seconds or minutes. Until now, the effects of unsteady ventilation scenarios are not fully described and so, reliable dimensioning rules are missing. Hence, with a better understanding of the flow in unsteady ventilation, systems can be calculated and optimised. To understand the effective mechanisms and derive functional relations between the flow field and variation parameters, full-field optical flow measurements are executed with a particle image velocimetry (PIV) system. Experiments are conducted under isothermal conditions in water in a small-scale room model (1.00 m × 0.67 m × 0.46 m) with two swirl ceiling diffusers, Reynolds-scaling assures similarity. In a series of experiments, the effects of different unsteady ventilation strategies on the flow fields are investigated and compared to steady conditions with the same mean exchange rate. Mean exchange rates, signal types, periods, and amplitudes are varied. Time-averaged normalised velocity fields already indicate notable differences between steady and unsteady cases especially for lower exchange rates: the distribution is more homogeneous in unsteady scenarios compared to steady conditions, and low-velocity areas are reduced while the mean velocity of the room increases. So, unsteady ventilation might be beneficial in terms of improved ventilation and energy savings in partial-load operation. Fast Fourier Transformation (FFT) analyses of the mean velocity for each field over the whole series detect the main frequency of the volume flow variation. By dividing the velocity field into smaller areas, this main frequency is still detected especially in the upper part of the room, but side frequencies play a role in the room as well. KW - unsteady ventilation KW - PIV KW - room airflow KW - mixing ventilation Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-151811 UR - https://proceedings.open.tudelft.nl/clima2022/article/view/200 PB - TU Delft OPEN CY - Delft ER - TY - CHAP A1 - Boiting, Bernd T1 - Thermische Batterien / Schwarmspeicher T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - Thermische Batterien / Schwarmspeicher Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178343 SP - 1 CY - Steinfurt ER - TY - RPRT A1 - Hinse, Michael T1 - The Wells turbine: state of the art N2 - The first oscillating water column was invented in 1940. In the past decades the need of wave energy systems has significantly increased. This article quickly describes the Wells turbine and possibilities to enhance its performance and should answer the question: what are the design parameters that can be optimized? Furthermore it gives a small outlook about the history of oscillating Water Columns. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_12 KW - wells turbine KW - owc KW - energy KW - oscillating water column KW - optimization Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136861 ER - TY - JOUR A1 - Klemm, Christian A1 - Becker, Gregor A1 - Tockloth, Jan N. A1 - Budde, Janik A1 - Vennemann, Peter T1 - The Spreadsheet Energy System Model Generator (SESMG): A tool for the optimization of urban energy systems JF - Journal of Open Source Software N2 - The Spreadsheet Energy System Model Generator (SESMG) is a tool for modeling and optimizing energy systems with a focus on urban systems. The SESMG is easily accessible as it comes with a browser-based graphical user interface, spreadsheets to provide data entry, and detailed documentation on how to use it. Programming skills are not required for the installation or application of the tool. The SESMG includes advanced modeling features such as the application of the multi-energy system (MES) approach, multi-objective optimization, model-based methods for reducing computational requirements, and automated conceptualization and result processing of urban energy systems with high spatial resolution. Due to its accessibility and the applied modeling methods, urban energy systems can be modeled and optimized with comparatively low effort. Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-170845 SN - 2475-9066 VL - 8 IS - 89 SP - 5519 ER - TY - JOUR A1 - Hörnschemeyer, Birgitta A1 - Söfker-Rieniets, Anne A1 - Niesten, Jan A1 - Arendt, Rosalie A1 - Kleckers, Jonas A1 - Klemm, Christian A1 - Stretz, Celestin Julian A1 - Reicher, Christa A1 - Grimsehl-Schmitz, Winona A1 - Wirbals, Daniel A1 - Bach, Vanessa A1 - Finkbeiner, Matthias A1 - Haberkamp, Jens A1 - Budde, Janik A1 - Vennemann, Peter A1 - Walter, Gotthard A1 - Flamme, Sabine A1 - Uhl, Mathias T1 - The ResourcePlan — An Instrument for Resource-Efficient Development of Urban Neighborhoods JF - Sustainability N2 - In Germany, the current sectoral urban planning often leads to inefficient use of resources, partly because municipalities lack integrated planning instruments and argumentation strength toward politics, investors, or citizens. The paper develops the ResourcePlan as (i) legal and (ii) a planning instrument to support the efficient use of resources in urban neighborhoods. The integrative, multi-methodological approach addresses the use of natural resources in the building and infrastructural sectors of (i) water (storm- and wastewater) management, (ii) construction and maintenance of buildings and infrastructure, (iii) urban energy system planning, and (iv) land-use planning. First, the development as legal instrument is carried out, providing (i) premises for integrating resource protection at all legal levels and (ii) options for implementing the ResourcePlan within German municipal structures. Second, the evaluation framework for resource efficiency of the urban neighborhoods is set up for usage as a planning instrument. The framework provides a two-stage process that runs through the phases of setting up and implementing the ResourcePlan. (Eco)system services are evaluated as well as life cycle assessment and economic aspects. As a legal instrument, the ResourcePlan integrates resource protection into municipal planning and decision-making processes. The multi-methodological evaluation framework helps to assess inter-disciplinary resource efficiency, supports the spatial identification of synergies and conflicting goals, and contributes to transparent, resource-optimized planning decisions. KW - resource efficiency KW - resource management KW - urban neighborhood KW - urban planning KW - urban development Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-148545 VL - 14 IS - 3 PB - MDPI ER - TY - CHAP A1 - Buitink, Martin A1 - Hageman, Simon A1 - van Leeuwen, Richard T1 - The effect of the configuration of a heat exchanger in a thermal storage T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - The effect of the configuration of a heat exchanger in a thermal storage Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178366 SP - 1 CY - Steinfurt ER - TY - RPRT A1 - Häner, Jurek T1 - Technologisches Lernen im Bereich Windenergie an Land N2 - Diese Arbeit befasst sich mit Kostentrends in Zusammenhang mit technologischem Lernen von Windenergie an Land in den USA, in Deutschland und weltweit. Ziel dieser Arbeit ist es, eine Lernkurve für Windenergie an Land zu bestimmen. Dafür wurden Daten zu Stromgestehungskosten (LCOE) und Kosten für die Installation (COP) von Windenergieanlagen (WEA) im Zeitraum von 1983 bis einschließlich 2020 gesammelt, grafisch dargestellt und weitergehend ausgewertet. Die grafische Darstellung der Datenlage verdeutlicht die zeitliche Entwicklung der Technologie. Zur Beschreibung dieser Lernkurven wurden die Progress Ratio (PR) und Learning Rate (LR) in fünf unterschiedlichen Modellen bestimmt. Anhand derer sich in Kombination mit der zukünftig installierten Leistung von WEA eine Prognose über zukünftige Kosten ableiten lässt. Die ermittelten LR bewegen sich zwischen 13 % und 28 %, woraus sich LCOE im Jahr 2030 zwischen 44,03 US$/MWh und 61 US$/MWh ergeben. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_07 KW - Wind energy KW - Technological Learning KW - renewable energy KW - Levelized cost of energy Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136814 ER - TY - JOUR A1 - Brinkschmidt, Florian T1 - Technologies for structural health monitoring of wind turbine blades - An overview of different techniques JF - Educational Journal of Renewable Energy Short Reviews N2 - Wind turbine structures take a major role in the modern conversion to renewable energy sources and contribute to the creation of a greener world. In recent years, the development and installation of wind turbines have seen rapid growth. However, with the increasing capacity and size of wind farms worldwide, there are growing concerns about the safety and reliability of these installations. Therefore, structural health monitoring and the detection of damage to wind turbines have gained considerable importance in research. Wind turbine blades are particularly susceptible to various types of damage due to environmental influences. This article provides an overview of signal responses, sensors used and non-destructive testing techniques in the field of damage detection on wind turbine blades. The intention of the article is to give an insight into the possibilities of structural health monitoring and at the same time to point out unsolved problems in this field. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_03 KW - structural health monitoring KW - wind turbine blades KW - damage detection KW - measurement KW - non-destructive testing Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176401 SP - 14 EP - 21 ER - TY - RPRT A1 - Tillenburg, Dennis T1 - Technical challenges of floating offshore wind turbines - An overview N2 - Floating offshore wind (FOW) holds the key to 80 % of the total offshore wind resources, located in waters of 60 m and deeper in European seas, where traditional bottom-fixed offshore wind (BFOW) is not economically attractive. Many problems affecting floating offshore wind turbines (FOWT) were quickly overcome based on previous experience with floating oil rigs and bottom-fixed offshore wind. However, this technology is still young and there are still many challenges to overcome. This paper shows that electrical failures are amongst the most significant errors of FOWT. The most common cause was corrosion. It is also stated that the control system is most often affected, and that the Generator is frequently involved. Material corrosion is also the key factor when it comes to the most common overall reason for failures. A particular attention must be paid to mooring line fracture. Mooring lines are especially vulnerable to extreme sea conditions and the resulting fatigue, corrosion, impact damage, and further risks. It must be stated that the primary challenge is that of economics. Over time technological costs will decline making FOW more competitive and hence attractive for greater depth. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_03 KW - floating offshore wind power KW - challenges KW - wind turbine KW - mooring line KW - Windkraftanlage Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136770 ER - TY - JOUR A1 - Volkmer, Philipp T1 - Technical challenges and trends in upscaling wind turbines - A review JF - Educational Journal of Renewable Energy Short Reviews N2 - The upscaling of wind turbines has been increasing in recent years and will continue to play a significant role in the future, as it allows for the reduction of electricity generation costs. Various challenges arise when it comes to upscaling. This article summarizes the technical challenges associated with upscaling wind turbines and presenting their problem-solving approaches and research trends based on other reviews. It was found that the most frequently cited challenges are related to individual components, such as rotor blades, drive train, generator, tower, and noise impact. For rotor blades, the challenges are increased flexibility, more aeroelastic vibrations, increased wear, interferences with radar and transportation difficulties. Proposed solutions include the use of carbon-fiber blades, prebending, novel paints, and for transportation, segmented rotor blades and on-site manufacturing. In the gearbox, torque increases, leading to higher weight and susceptibility to errors. As a result, the trend is moving towards gearless systems with permanent magnet synchronous generators. Transportation is the major issue with towers, which can be resolved with on-site manufacturing. In terms of noise emission, reducing aerodynamic noise plays the most significant role. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_12 KW - upscaling wind turbines KW - large wind turbines KW - trends and challenges wind turbines KW - wind turbine enlargement Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176492 SP - 73 EP - 78 ER - TY - RPRT A1 - Olbertz, Niklas T1 - Sustainable hydro-power plants with focus on fish-friendly turbine design N2 - The impact of hydro-power plants on the ecosystem was studied with focus on the fish mortality and types of damage for many years. The fish mortality have a wide range of causes. Types of damage can be different and are caused by different parts of the power plant. The most dangerous part of the system are the fast moving turbine blades. They can cause blade strike and barotrauma due to the high speeds. Different types of turbines were developed for a better survival rate. Five different types of different research groups and manufacturers are presented in this paper. By considering those newly developed turbine designs, a fish survival rate from 96 % to 100 % is achieved. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_13 KW - fish-friendly turbine KW - fish injury KW - sustainable hydro-power KW - Alden turbine KW - Minimum Gap Runner Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136876 ER - TY - JOUR A1 - Siering, Nils A1 - Grüning, Helmut T1 - Stormwater Tree Pits for Decentralized Retention of Heavy Rainfall JF - Water N2 - Stormwater tree pits with storage elements enable the irrigation of urban trees and can potentially act as decentralized rainwater retention basins. This paper mainly focuses on analyzing this potential. Field tests were conducted to investigate the irrigation behavior and the storage effect of a storm water tree pit system using Perl hoses as irrigation elements over a period of two years. The rainfall, storage volumes, and soil moisture within the employed planting pit were measured. With the help of system modeling, the retention ability of the storm water tree pit system was analyzed. The available storage volume was sufficient to irrigate trees for several days. During the measurement period, about 15% of the inflowing rainwater was fed to the root zone of the tree. With practical storage volumes of 200 to 300 m3/ha, a remarkable amount of water from heavy rainfall could be completely stored, thus significantly reducing the risk of flooding. The retention effect and irrigation behavior largely depend on the soil conditions and the technical possibilities of the equipment supplying the root area (in this case, Perl hoses). Further investigations are required to determine the influence on the growth conditions of trees and optimize of the system for discharge into the root zone. KW - stormwater tree pits KW - decentralized storm water retention system Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-177201 SN - 2073-4441 VL - 2023 / 15 IS - Water 2023, 15, 2987 SP - 1 EP - 16 ER - TY - JOUR A1 - Recker, Luis T1 - State of the art: Corrosion protection for offshore wind turbines JF - Educational Journal of Renewable Energy Short Reviews N2 - This review paper provides an initial overview of the state of the art of common corrosion protection methods for offshore wind turbines. The functions of the individual corrosion protection methods and their interaction are explained. In addition, the specific corrosion protection of different zones and components of an offshore wind turbine will be discussed. Finally, some information is given on current and possible future developments in this subject area. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_10 KW - corrosion protection KW - offshore wind turbines Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176475 SP - 61 EP - 66 ER - TY - GEN A1 - Tockloth, Jan N. A1 - Klemm, Christian A1 - Becker, Gregor A1 - Blankenstein, Benjamin A1 - Vennemann, Peter T1 - Spreadsheet Energy System Model Generator (SESMG) T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Die Transformation der Energiesysteme im Rahmen der Energiewende macht diese durch zusätzliche Komponenten und Wechselwirkungen immer komplexer. Das ökonomische und ökologische Potenzial, dass sich aus der Nutzung der Synergien dieser Komponenten ergeben kann, erfordert eine gemeinsame Betrachtung des gesamten Energiesystems hinsichtlich sämtlicher Energie- und Verbrauchssektoren. Die Energiesystemmodellierung stellt eine geeignete Methode zur Modellierung und Optimierung dieser urbanen Energiesysteme dar. Mit dem „Spreadsheet Energy System Model Generator“ (SESMG) hat die FH Münster ein Open Source Tool entwickelt, das die Betrachtung urbaner Quartiere ermöglicht. Diese können hinsichtlich verschiedener Zielkriterien wie z. B. monetären Kosten und THG-Emissionen optimiert werden. Die tabellenbasierte Eingabe erfordert keine Programmierkenntnisse. Das implementierte Urban District Upscaling Tool erleichtert die effektive Modellierung auch größerer Systeme. Die automatisierte Ergebnisaufbereitung ermöglicht eine schnelle Analyse der Ergebnisse. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178209 ER - TY - RPRT A1 - Tchorz, Enno T1 - Sensorless maximum power point tracking systems in wind energy conversion systems - A review N2 - Wind energy conversion systems have attracted considerable attention as a renewable energy source due to depleting fossil fuel reserves and environmental concerns as a direct consequence of using fossil fuel and nuclear energy sources. The increasing number of wind turbines increases the interest in efficient systems. The power output of a wind energy conversion system depends on the accuracy of the maximum power tracking system, as wind speed changes constantly throughout the day. Maximum power point tracking systems that do not require mechanical sensors to measure the wind speed offer several advantages over systems using mechanical sensors. In this paper four different approaches that do not use mechanical sensors to measure the wind speed will be presented; the assets and drawbacks of these systems are highlighted, and afterwards the examined algorithms will be compared based on different characteristics. Finally, based on the analysis, an evaluation is made as to which of the presented algorithms is the most promising. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_05 Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136791 ER - TY - RPRT A1 - Speller, Julian T1 - Self-build small wind turbines - A review N2 - Self-build small wind turbines are used for rural electrification in the developed and developing world as well as for educational purposes. To give an overview about self-build small wind turbines a systematic literature review was conducted. The identified literature deals with two different vertical and horizontal axis turbine designs. The vertical axis turbines are both prototypes while one of the horizontal axis designs, the design by Piggott is widely used in rural electrification projects. Different papers dealing with the optimization of the Piggott design exist. In retrospect the conduction of a holistic review was not possible due to limited resources and length of this review. Nevertheless it can give a quick overview and a starting point for further research. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_10 KW - small wind turbines KW - self-build KW - horizontal axis KW - vertical axis Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136845 ER - TY - RPRT A1 - Steinigeweg, Joshua T1 - Review of the suitability of thermoplastic rotor blades in terms of the circular economy N2 - Wind energy has steadily gained importance in the generation of renewable energy over the last 25 years. A wind turbine has an average life expectancy of about 25 years. After that, thermoplastic composite materials from the rotors, among other things, accumulate and have to be recycled. Previous methods, such as landfilling, incineration and pyrolysis, have not yet proven to be effective in terms of the circular economy because the recycled material cannot be reused for equivalent products. The use of thermoplastic materials can be a sensible alternative, as thermoplastic resins can be recycled almost without loss of value due to their properties. Recycling of fibreglass is also possible with less loss of stiffness. In the future, it will be crucial to scale up thermoplastic rotor blades and create a market for the recycled material. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_06 KW - Wind power KW - Recycling KW - Thermoplastic rotor KW - Solvolysis KW - Circular economy Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136809 ER - TY - RPRT A1 - Budde, Janik T1 - Residential load profile tools - A review and comparison of applied tools N2 - The energy demand of the residential sector contributed to about 29 % of Germany’s final energy consumption in 2020. For the planning and optimization of energy systems, an understanding of the temporal energy consumption is necessary. This paper discusses tools for estimating these load profiles. Load profiles for electricity, space heating and domestic hot water (DHW) are investigated. A total of ten tools were applied. It turns out that the selected load profiles are dependent on the field of application. Load profiles influence the results of energy system modeling and therefore it is important to differentiate load profile tools. Standardized load profiles are well suited when a large number of buildings are considered. Stochastic load profiles, behavioral load profiles and the reference load profiles are well suited for building-specific simulations. Physical load pro- files are well suited for single building models, but as soon as several buildings are considered, the input effort for a sufficient accuracy is high. KW - Load Profiles KW - Urban Energy System KW - Urban Building Energy Modeling KW - Urban Energy System Modeling Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178573 ER - TY - CHAP A1 - Harms-Ensink, Tim A1 - Mehnert, Sylke A1 - Häner, Jurek A1 - Brügging, Elmar T1 - ReMolk: Dekarbonisierung der Energieversorgung einer Molkerei durch die anaerobe Vergärung landwirtschaftlicher Reststoffe T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - ReMolk: Dekarbonisierung der Energieversorgung einer Molkerei durch die anaerobe Vergärung landwirtschaftlicher Reststoffe Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178407 SP - 1 CY - Steinfurt ER - TY - JOUR A1 - Weißer, Hannes T1 - Relevance of Bird Strikes on Wind Turbines in Germany: A Review JF - Educational Journal of Renewable Energy Short Reviews N2 - As Germany aims to increase its utilization of wind power, the potential threat to bird populations due to this expansion is a controversial issue. This paper aims to collect data on the magnitude of bird strikes on wind turbines, review existing protective measures and explore innovative solutions. After a thorough examination of the literature, it was concluded that although the impact on bird populations is significant, it may be overemphasized in popular debates. This statement is not final as further research is necessary to assess the impact of bird strikes and explore new solutions. Comprehensive studies on this specific topic in Germany are limited, which makes a thorough evaluation challenging. While there are measures in place to protect species that may be negatively impacted, it is possible that these measures will not be adequate for all of them. While several innovative methods are under examination, progress in testing and implementation is slow. Lastly, an information problem was identified. Since the topic is highly politicized and polarizing, it is crucial to provide the public with accessible and reliable information on the discussed themes. This is currently not the case due to a lack of data and missing information campaigns. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_13 KW - bird strike KW - wind power KW - red kite Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176500 SP - 79 EP - 84 ER - TY - GEN A1 - Mesenhöller, Eva A1 - Vennemann, Peter T1 - Raumströmungsmessung mit Particle Image Velocimetry - Instationärer Betrieb von RLT-Anlagen N2 - Überblick über Methodik, Hintergründe und Ziele des Projekts zu instationärer Raumlüftung sowie bisherige Untersuchungsschwerpunkte auf diesem Gebiet. KW - instationäre Lüftung KW - PIV KW - Lüftungstechnik Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178587 ER - TY - GEN A1 - Mesenhöller, Eva A1 - Vennemann, Peter A1 - Hussong, Jeanette T1 - Raumströmungsmessung mit Particle Image Velocimetry (PIV) - Instationärer Betrieb von RLT-Anlagen N2 - Posterzusammenfassung der Hintergründe, Ziele, Messprinzipien, Messungen und des Versuchsstandes im Projekt zur Untersuchung instationärer Raumlüftung. KW - PIV KW - instationäre Lüftung KW - Lüftungstechnik Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178597 ER - TY - GEN A1 - Mesenhöller, Eva A1 - Jacobs, Steffen A1 - Vennemann, Peter T1 - Raumströmung bei instationärem Betrieb von RLT-Anlagen - Experimentelle und numerische Untersuchungen mit PIV und CFD N2 - Posterzusammenfassung der Hintergründe, Ziele, Methoden (messtechnisch und numerisch) und Ergebnisse im Projekt zu instationärer Lüftung. KW - instationäre Lüftung KW - PIV KW - CFD KW - Lüftungstechnik KW - OpenFOAM Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178605 ER - TY - JOUR A1 - Klemm, Christian A1 - Vennemann, Peter A1 - Wiese, Frauke T1 - Potential-risk and no-regret options for urban energy system design — A sensitivity analysis JF - Sustainable Cities and Society N2 - This study identifies supply options for sustainable urban energy systems, which are robust to external system changes. A multi-criteria optimization model is used to minimize greenhouse gas (GHG) emissions and financial costs of a reference system. Sensitivity analyses examine the impact of changing boundary conditions related to GHG emissions, energy prices, energy demands, and population density. Options that align with both financial and emission reduction and are robust to system changes are called “no-regret” options. Options sensitive to system changes are labeled as “potential-risk” options. There is a conflict between minimizing GHG emissions and financial costs. In the reference case, the emission-optimized scenario enables a reduction of GHG emissions (-93%), but involves higher costs (+160%) compared to the financially-optimized scenario. No-regret options include photovoltaic systems, decentralized heat pumps, thermal storages, electricity exchange between sub-systems and with higher-level systems, and reducing energy demands through building insulation, behavioral changes, or the decrease of living space per inhabitant. Potential-risk options include solar thermal systems, natural gas technologies, high-capacity battery storages, and hydrogen for building energy supply. When energy prices rise, financially-optimized systems approach the least-emission system design. The maximum profitability of natural gas technologies was already reached before the 2022 European energy crisis. KW - sustainable energy KW - urban energy system KW - no-regret KW - sensitivity analysis KW - energy system modeling Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-175686 SN - 2210-6707 VL - 102 SP - 105189 ER - TY - JOUR A1 - Sommer, Philipp T1 - Open-Power System Modelling - A Review of Existing Methods and Models JF - Educational Journal of Renewable Energy Short Reviews N2 - This review paper presents a short overview of current power system modelling tools especially used for analysing energy and electricity systems for the supply and demand sector. The main focus of this review lies on open source tools and models which are written and used in the programming language “Python”. The modelling tools are represented in a comprehensive table with key information. Five modelling tools with an open source license can be filtered out. The modelling tool PyPSA can be considered as a high performing tool especially as the gap between power system analysis tool (PSAT) and energy system modelling tool. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2023_04 KW - energy system modelling KW - grid modelling KW - power system modelling KW - open source KW - renewable energy Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-172636 SP - 21 EP - 26 ER - TY - JOUR A1 - Klemm, Christian A1 - Wiese, Frauke A1 - Vennemann, Peter T1 - Model-based run-time and memory reduction for a mixed-use multi-energy system model with high spatial resolution JF - Applied Energy N2 - Local and regional energy systems are becoming increasingly entangled. Therefore, models for optimizing these energy systems are becoming more and more complex and the required computing resources (run-time and random access memory usage) are increasing rapidly. The computational requirements can basically be reduced solver-based (mathematical optimization of the solving process) or model-based (simplification of the real-world problem in the model). This paper deals with identifying how the required computational requirements for solving optimization models of multi-energy systems with high spatial resolution change with increasing model complexity and which model-based approaches enable to reduce the requirements with the lowest possible model deviations. A total of 12 temporal model reductions (reduction of the number of modeled time steps), nine techno-spatial model reductions (reduction of possible solutions), and five combined reduction schemes were theoretically analyzed and practically applied to a test case. The improvement in reducing the usage of computational resources and the impact on the quality of the results were quantified by comparing the results with a non-simplified reference case. The results show, that the run-time to solve a model increases quadratically and memory usage increases linearly with increasing model complexity. The application of various model adaption methods have enabled a reduction of the run-time by over 99% and the memory usage by up to 88%. At the same time, however, some of the methods led to significant deviations of the model results. Other methods require a profound prior knowledge and understanding of the investigated energy systems to be applied. In order to reduce the run-time and memory requirements for investment optimization, while maintaining good quality results, we recommend the application of (1) a pre-model that is used to (1a) perform technological pre-selection and (1b) define reasonable technological boundaries, (2) spatial sub-modeling along network nodes, and 3) temporal simplification by only modeling every nth day (temporal slicing), where at least 20% of the original time steps are modeled. Further simplifications such as spatial clustering or larger temporal simplification can further reduce the computational effort, but also result in significant model deviations. KW - energy system model KW - model-based KW - run-time KW - memory usage KW - multi-energy system Y1 - 2023 U6 - http://dx.doi.org/10.1016/j.apenergy.2022.120574 SN - 0306-2619 VL - 334 SP - 120574 ER - TY - RPRT A1 - Hoge, Alexander T1 - Measures for mitigating avian collision rates with wind turbines - Determining an effective technique regarding effort and effect N2 - Because of the rapid expansion and widespread application of wind energy the overall environmental impacts of wind power plants have increased as well. For the further development of wind power, methods to lessen the adverse effects wind power has on avian populations have to be implemented. This review aims to find effective methods to reduce avian collision rates with wind turbines and that therefore can reduce bird fatality rates. For the assessment the different mitigation methods, for which concrete data was found, are compared with each other regarding the hypothetical effort of implementation and effectiveness in reducing avian collision rates with wind turbines. These methods are: (a) Coloring of rotor blades (b) Coloring of the tower base (c) Ultraviolet/violet lightning (d) Temporary shut-down of wind turbines (e) Auditory warning signals (f) Repowering All of the mentioned methods report influence on reducing avian collision rates or at least the behavior of birds in flight. This review found the following three methods to be most effective: (a) Coloring of rotor blades (b) Temporary shut-downs of wind turbines (c) Repowering The most effective method to reduce avian collision rates at horizontal axis wind turbines is to paint one of the rotor blades black and consequently increasing the visibility of the rotor blades. The presented study reports 71,9 percent reduction of found carcasses of birds at the treated turbines. For this method the effort of implementation is low while the effectiveness is high. The effectiveness of the found mitigation methods has been proven and they are suited for application. The method of using lightning or sound fields require more testing to determine their effectiveness. Another topic for research could be how different mitigation methods interact with each other. Is there a significant advantage to be had if multiple mitigation methods are applied at the same wind power plant or turbine? Furthermore the environmental impacts of wind turbines are not limited to birds. Other animals like bats are affected too and might require different methods of mitigation. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_08 KW - wind turbine KW - wind energy KW - birds KW - collisions KW - mitigation Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136826 ER - TY - RPRT A1 - Scheffler, Mark T1 - Low-Cost Hydropower Turbines for Developing Countries N2 - There are many hydropower turbines for low heads or low flows on a small scale. Many technologies are unsuitable for developing countries because equipment or materials are limited, high-tech machines are to expensive or spare parts are not readily available. This review combines currently available technologies with the requirements of developing countries in small, micro and pico hydropower. In small hydropower a propeller turbine from Thailand has a high efficiency of 70 to 80 percent at calculated production costs of around $ 513 per kW. Pumps as turbines are suitable for developing countries in micro hydropower due to readily availability, low price and an large number of standard sizes. In pico-scale, a low-cost Turgo wheel can be made of spoons for $ 48 and yields acceptable values in comparison to a 3D printed Pelton wheel for $ 822. While the Turgo wheel is suitable for high heads, a homemade siphon turbine can be used for low heads. The siphon turbine generates up to 200 W, is made of materials that are available anywhere in the world, and costs less than $ 50. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_11 KW - hydropower KW - developing countries KW - low-cost KW - micro hydro KW - small hydro Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136858 ER - TY - JOUR A1 - Goray, Lars T1 - Life cycle energy analysis and ecological impact of wind turbines - a comparison of life cycle assessments JF - Educational Journal of Renewable Energy Short Reviews N2 - The use of wind power is rapidly expanding worldwide. It is important to examine the impact of wind turbines on the environment to see if they provide a net benefit and to identify potential for improving. Therefore life cycle assessments (LCA) of different wind turbine types are compared in this short review. The results are then shown side by side in tables for comparison. Overall the LCAs show that wind turbines compensate the required energy and emitted pollutants after approx. 6-16 months. The energy payback period (EPP) for 2 MW onshore wind turbines remained roughly the same since 2009 with approximately 7 months. Onshore wind turbines have a higher impact due to emissions but a shorter EPP than offshore wind turbines. The estimated service life of 20 years should be maximized to ensure a high energy yield ratio. The biggest impact on the environment results from the processes to provide the building material e.g. steel and cement. That impact could be reduced by 20 % if recycled steel would be used. It is shown that wind power is one of the cleanest energy sources. But further investigations in material processing and recycling are important to improve the eco-balance of wind turbines. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2023_02 KW - wind turbine KW - wind power KW - regenerative energy KW - life cycle assessment KW - energy analysis Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-172613 SP - 8 EP - 15 ER - TY - RPRT A1 - Hörnschemeyer, Birgitta A1 - Kleckers, Jonas A1 - Stretz, Celestin A1 - Klemm, Christian A1 - Budde, Janik A1 - Arendt, Rosalie A1 - Lewe, Mareike A1 - Albers, Flemming T1 - Leitfaden RessourcenPlan – Teil 3.3: Maßnahmen des Quartiersmanagements: Maßnahmensteckbriefe. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier T3 - Leitfaden RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier - 3.3 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-157603 ER - TY - RPRT A1 - Söfker-Rieniets, Anne A1 - Vonhoegen, Laura A1 - Klemm, Christian A1 - Budde, Janik A1 - Hörnschemeyer, Birgitta A1 - Lewe, Mareike A1 - Kleckers, Jonas A1 - Stretz, Celestin T1 - Leitfaden RessourcenPlan – Teil 3.2: Lernen von anderen – Booklet „Best-Practice“. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier T3 - Leitfaden RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier - 3.2 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-157595 ER - TY - RPRT A1 - Hörnschemeyer, Birgitta A1 - Kleckers, Jonas A1 - Stretz, Celestin A1 - Klemm, Christian A1 - Budde, Janik A1 - Söfker-Rieniets, Anne A1 - Vonhoegen, Laura A1 - Zamzow, Malte A1 - Matzinger, Andreas A1 - Maßmann, Stefanie A1 - Plogmeier, Christoph T1 - Leitfaden RessourcenPlan – Teil 3.1: Kurzanleitung RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier T3 - Leitfaden RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier - 3.1 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-157581 ER - TY - RPRT A1 - Klemm, Christian A1 - Budde, Janik A1 - Becker, Gregor A1 - Arendt, Rosalie A1 - Bach, Vanessa A1 - Finkbeiner, Matthias A1 - Vennemann, Peter T1 - Leitfaden RessourcenPlan – Teil 2.4: Ressourcenmanagement Energie. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier T3 - Leitfaden RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier - 2.4 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-157560 ER - TY - RPRT A1 - Hörnschemeyer, Birgitta A1 - Söfker-Rieniets, Anne A1 - Niesten, Jan A1 - Arendt, Rosalie A1 - Kleckers, Jonas A1 - Stretz, Celestin A1 - Klemm, Christian A1 - Budde, Janik A1 - Wagner, Rüdiger A1 - Vonhoegen, Laura A1 - Reicher, Christa A1 - Grimsehl-Schmitz, Winona A1 - Wirbals, Daniel A1 - Stieglitz-Broll, Eva-Maria A1 - Agatz, Kerstin A1 - Bach, Vanessa A1 - Finkbeiner, Matthias A1 - Lewe, Mareike A1 - Henrichs, Malte A1 - Haberkamp, Jens A1 - Walter, Gotthard A1 - Flamme, Sabine A1 - Vennemann, Peter A1 - Zamzow, Malte A1 - Seis, Wolfgang A1 - Matzinger, Andreas A1 - Sonnenberg, Hauke A1 - Rouault, Pascale A1 - Maßmann, Stefanie A1 - Fuchs, Lothar A1 - Plogmeier, Christoph A1 - Steinkamp, Arne A1 - Şereflioğlu, Şenay A1 - Müller, Claus A1 - Spital, Matthias A1 - Uhl, Mathias T1 - Leitfaden RessourcenPlan – Teil 1: Konzeption RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier T3 - Leitfaden RessourcenPlan. Ergebnisse des Projekts R2Q RessourcenPlan im Quartier - 1 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-157463 PB - FH Münster CY - Münster ER - TY - JOUR A1 - Klemm, Christian A1 - Wiese, Frauke T1 - Indicators for the optimization of sustainable urban energy systems based on energy system modeling JF - Energy, Sustainability and Society N2 - Background: Urban energy systems are responsible for 75 % of the world's energy consumption and for 70 % of the worldwide greenhouse gas emissions. Energy system models are used to optimize, benchmark and compare such energy systems with the help of energy sustainability indicators. We discuss several indicators for their basic suitability and their response to changing boundary conditions, system structures and reference values. The most suitable parameters are applied to four different supply scenarios of a real-world urban energy system. Results: There is a number of energy sustainability indicators, but not all of them are suitable for the use in urban energy system optimization models. Shortcomings originate from the omission of upstream energy supply chains (secondary energy efficiency), from limited capabilities to compare small energy systems (energy productivity), from excessive accounting expense (regeneration rate), from unsuitable accounting methods (primary energy efficiency), from a questionable impact of some indicators on the overall system sustainability (self-sufficiency), from the lack of detailed information content (share of renewables), and more. On the other hand, indicators of absolute greenhouse gas emissions, energy costs, and final energy demand are well suitable for the use in optimization models. However, each of these indicators only represents partial aspects of energy sustainability; the use of only one indicator in the optimization process increases the risk that other important aspects will deteriorate significantly, eventually leading to suboptimal or even unrealistic scenarios in practice. Therefore, multi-criteria approaches should be used to enable a more holistic optimization and planning of sustainable urban energy systems. Conclusion: We recommend multi-criteria optimization approaches using the indicators of absolute greenhouse gas emissions, absolute energy costs, and absolute energy demand. For benchmarking and comparison purposes, specific indicators should be used and therefore related to the final energy demand, respectively the number of inhabitants. Our example scenarios demonstrate modeling strategies to optimize sustainability of urban energy systems. KW - energy system modeling KW - urban energy systems KW - Multi-objective optimization KW - energy sustainability KW - Multi-energy systems Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-145136 VL - 12 IS - 3 SP - 1 EP - 20 PB - Springer Nature ER - TY - RPRT A1 - Schmeinck, Hendrik T1 - Impact of wind and wave induced platform motion on the aerodynamic properties of floating offshore wind turbines N2 - With floating offshore wind turbines, new sources of wind energy can be used, which cannot be tapped into by bottom-fixed wind turbine systems. However, due to their design, they experience additional motion caused by wind and wave loads. The motions that are induced into the system have an oscillating course. This affects the aerodynamic properties of the wind turbine and leads to changes in the thrust force and power output of floating wind turbines compared to bottom-fixed wind turbines. Furthermore, the motions lead to an earlier breakdown of the helical wake structure behind the wind turbine and moreover lead to a decreased reliability of the rotor blades. Differences in the effects of wind and wave loads on the aerodynamic performance of floating offshore wind turbines supported by different platform systems were found. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_01 KW - floating offshore wind turbine KW - unsteady aerodynamics KW - six-degree-of-freedom motions KW - failure probabilities KW - rotor blade reliability Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136750 ER - TY - JOUR A1 - Nölken, Lukas T1 - Impact of robotics on the operation and maintenance of offshore wind turbines - A review JF - Educational Journal of Renewable Energy Short Reviews N2 - This article analyses the impact of robotics on the operation and maintenance (O&M) of offshore wind turbines (OWTs), with a particular emphasis on the challenges and benefits. As the world’s reliance on renewable energy, particularly offshore wind, increases to reduce climate change, the growing number of OWTs requires effective O&M. Challenges consist of logistics, accessibility and high costs. The paper presents the application of climbing robots, unmanned aerial vehicles and underwater robots to overcome these challenges. The combination of multiple robotic platforms, such as autonomous surface vehicles and autonomous underwater vehicles, represents a collaborative approach to O&M. Obstacles include the need for accurate navigation, building trust between humans and robots, and research into artificial intelligence. In conclusion, the integration of robotics in O&M presents considerable advantages, increasing efficiency, safety and cost-effectiveness. Further progress and research into artificial intelligence are crucial in achieving complete automation, which will transform the O&M of OWTs. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_08 KW - offshore wind turbine KW - operation and maintenance KW - robotics KW - climbing robots KW - underwater robots Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176456 SP - 46 EP - 52 ER - TY - JOUR A1 - Bresgott, Jannes T1 - How can artificial intelligence be used to find areas for wind turbines and solve other challenges associated with wind energy? JF - Educational Journal of Renewable Energy Short Reviews N2 - This article discusses the use of artificial intelligence in the wind energy industry, particularly in addressing challenges and optimizing the expansion of renewable energies in Germany. It highlights the application of artificial intelligence in wind forecasts and yield predictions, bird detection, wind turbine and farm design, condition monitoring, and predictive maintenance. Additionally, it introduces the “WindGISKI” research project, which aims to use artificial intelligence to identify new areas for wind turbines. The project utilizes a neural network to analyze and predict flight routes, potentially reducing bird mortality. The document also emphasizes the potential broader applications of “WindGISKI” in other fields of activity, such as land use planning and city development. Overall, it underscores the significant role of artificial intelligence in addressing challenges in wind energy and outlines the potential for artificial intelligence to drive the expansion of renewable energies while addressing key obstacles. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_02 KW - wind turbine KW - WindGISKI KW - artificial intelligence Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176393 SP - 9 EP - 13 ER - TY - RPRT A1 - Wittor, Yannick T1 - Harvesting wind energy through electrostatic wind energy conversion - Comparison with common wind turbines and future possibilities N2 - Despite their important role in our energy system, common wind turbines have some disadvantages. Mainly, those disadvantages are connected to the intermediate conversion of wind energy in rotational energy. The resulting effects include maintenance costs and social acceptance problems. There are different technological approaches, that convert wind energy to electrical energy without its conversion to kinetic energy. As one of those technologies, the electrostatic wind energy conversion is to be discussed in this article. For this discussion, the historical development of this technology is presented. There are three important projects which will be presented to explain the technology and its different technological approaches. Those projects are the WPG, the EWICON and the SWET. Furthermore the results of those different experimental projects are collected and analyzed. On the basis of this analysis it is discussed, whether or not the electrostatic wind energy conversion could be of importance in a future energy system. Therefore the technology is set in relation to modern wind turbines. Also, important factors that influence the efficiency and energy output of those systems are outlined for further research. Due to different technological approaches a suggestion is made for the most promising system setting. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_09 KW - electrostatic wind energy KW - wind energy KW - solid state wind energy KW - electrohydrodynamics KW - bladeless wind generator Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136832 ER - TY - JOUR A1 - Zurhold, Roman T1 - Guidelines for Onshore Repowering in Germany JF - Educational Journal of Renewable Energy Short Reviews N2 - Wind energy plays a major role among renewable energies. Its expansion is therefore important in order to achieve the climate targets. Repowering is an important element in the expansion of wind energy. On the one hand, it offers a solution for many wind turbines in Germany that are no longer subsidised due to their age. On the other hand, modern turbines are significantly more powerful and enable more efficient land utilisation. This article provides an overview of the most important aspects of onshore repowering. There is a lot to consider when repowering wind turbines. The legal situation for repowering aims to be improved through simplified authorisation procedures. Even though efforts are being made by the government, there is still room for improvement. The repowering potential is also dependent on the various distance regulations to residential buildings in the federal states. These regulations might also be improved in the future. Another aspect is the remuneration, which is now closer to market developments due to the market premium model. It is also subject to greater competition as a result of the tendering process. At the same time, interest rates and turbine prices have risen, which creates economic challenges for the operators of future wind farms. Last but not least, repowering also depends on public acceptance. This is also to be regulated by law in the future. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_14 KW - Onshore repowering KW - simplified authorisation procedure KW - distance regulations KW - market premium model KW - tendering Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176520 SP - 85 EP - 93 ER - TY - CHAP A1 - Rolf, Juliana A1 - Kamphus, Sören A1 - Brügging, Elmar T1 - Forschungsprojekt SolidScore: Biologische Wasserstofferzeugung aus Biomassefeststoffen T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - Forschungsprojekt SolidScore: Biologische Wasserstofferzeugung aus Biomassefeststoffen Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178418 SP - 1 CY - Steinfurt ER - TY - JOUR A1 - Müller, Hendrik T1 - Fish mortality at hydropower plants - Protection Measures and Solutions JF - Educational Journal of Renewable Energy Short Reviews N2 - The construction and operation of hydropower plants for energy generation is a major issue in sustainable energy production. Nevertheless, hydropower plants have a negative impact on fish populations. It is crucial to understand the causes and consequences of fish mortality in hydropower plants in order to find sustainable solutions that reconcile the need for energy with the conservation of aquatic ecosystems. This article examines the fish protection measures that can be implemented to reduce fish mortality and maintain ecological balance. Based on the main literature reviewed, this article mainly refers to Germany in terms of studies carried out and hydropower plants. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_07 KW - fish mortality KW - Turbine-related injuries KW - Fish migration aids KW - Fish-friendly turbines KW - Mortality rates Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176444 SP - 41 EP - 45 ER - TY - JOUR A1 - Bredehöft, Claas T1 - Environmental impacts of tidal power plants - Current status of the environmental impacts of conventional tidal power plants JF - Educational Journal of Renewable Energy Short Reviews N2 - Meanwhile, renewable energy sources such as hydropower, solar and wind energy and biomass are increasingly being used to reduce dependence on fossil fuels and thus counteract the ongoing global warming. However, these are also associated with environmental impacts. To that effect, this article takes a closer look at tidal power plants, which are classified as hydroelectric power plants, by conducting a systematic literature review. The results show that the strength and form of the environmental impact depends on the specific location and type of plant. Tidal power plants have an impact on the habitats of marine animals and thus influence their behavior and population. In addition, the operation of tidal power plants changes the sediment distribution, causes a reduction in current velocities and a change in current direction in the surrounding area and leads to a change in wave height. The construction of the power plants is associated with noise, which primarily causes changes in the behavior of some species. Furthermore, the electromagnetic fields generated can also affect marine life. In order to assess the environmental impact of tidal power plants in comparison to other renewable energies, further studies should focus on the environmental impact of the different technologies in relation to the energy yield. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_01 KW - tidal power plants KW - environmental impacts KW - tidal barrage KW - tidal stream KW - hydropwer plants Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176379 SP - 3 EP - 8 ER - TY - CHAP A1 - Eske, Hilbrands A1 - Nina, Altensell A1 - Fabian, Elsner A1 - Grüning, Helmut T1 - Entwicklung eines Konzeptes zur Nachrüstung von Regenklärbecken mit technischen Regenwasserfiltern T2 - Berichte aus der Siedlungswasserwirtschaft der Technischen Universität München Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-171898 SN - 0942-914X N1 - Link zum gesamten Tagungsband: https://www.tugraz.at/fileadmin/user_upload/tugrazExternal/c76c507b-d7bb-4008-944c-284302b6351a/PDFs/2023/Tagungsband/Tagungsband_AU2023.pdf VL - 227 SP - 199 EP - 208 CY - Garching ER - TY - THES A1 - Blankenstein, Benjamin T1 - Energiesystemmodellierung von Kasernen N2 - Die Planung urbaner Energiesysteme wird durch die zunehmende Verbreitung sektorgekoppelter Technologien und neuer Verbrauchssektoren immer komplexer. Klassische Planungsmethoden kommen an ihre Grenzen. Die Energiesystemmodellierung (ESM) bietet eine Möglichkeit, ein Energiesystem hinsichtlich der Kosten und der Treibhausgas (THG)- Emissionen zu optimieren. Gleichzeitig ergibt sich aus der Energiewende und angestrebten THG-Neutralität ein akuter Handlungsbedarf. Dies gilt auch für die 1 500 Kasernen in Deutschland. Im Rahmen dieser Arbeit werden der bestehende Modellierungsprozess des Spreadsheet Energy System Model Generator (SESMG) erweitert, indem Herausforderungen der Modellierung und Optimierung von Kasernen identifiziert und Lösungsansätze hierzu entwickelt werden. Diese Arbeit basiert auf der ESM einer realen Kaserne. Es kann das Urban District Upscaling Tool zur Erstellung der für den SESMG benötigten Modelldefinition verwendet werden. Die Open-Source Datenbank SESMG-Data, kann automatisch die benötigte Standard Parameter Tabelle mit zugehörigem Bericht generieren. Weiterhin wurde ein Energieaustauschmodell vorgestellt, das den Energieaustausch zwischen Kasernen eines Bilanzkreises ermöglicht. Ein Fokus liegt auf der Abbildung zukünftiger Ausbaupläne. Dazu wurden kasernenspezifische Gebäudeprofile entwickelt, die gemittelte spezifische Energiebedarfe und weitere Parameter zur Berechnung der Wand-, Fenster-, und Dachfläche enthalten. Der spezifische Wärmebedarf kann durch einen Faktor an die Baualtersklasse angepasst werden. Mit Hilfe statistischer Kennwerte lässt sich ein geeignetes Standardlastprofil für verschiedene Gebäudeprofile auswählen. Zur Reduktion der Komponenten im Energiesystemoptimierungsmodell (ESOM) können die Dachflächenpotenziale von Photovoltaikanlagen zusammengefasst werden. Da Kasernen nur eine Bilanzgrenze besitzen, können zudem auch die Strombedarfe der einzelnen Gebäude zusammengefasst werden. Damit lassen sich gleichzeitig dezentrale Batteriespeicher als Komponente des ESOMs ausschließen. Die Potenzialflächen von Erdwärmepumpen können zusammengefasst werden, wobei Abstands- und Belastbarkeitsgrenzen eingehalten werden müssen. Kasernen verfügen häufig über Bestandswärmenetze, die im ESOM gesondert berücksichtigt werden müssen. Um dieses Bestandswärmenetz abzubilden, können die Verteilleitungen manuell nachgezeichnet werden und in einer Vormodellierung mit dem SESMG mit geringeren Kosten angesetzt werden. Die in dieser Arbeit entwickelten Methoden sind allgemeingültig für Kasernen. Die Übertragbarkeit der kasernenspezifischen Gebäudeprofile ist aufgrund der unterschiedlichen Nutzung von Kasernen nur eingeschränkt möglich. Der bestehende Modellierungsprozess wurde um kasernenspezifische Prozessschritte erweitert und visualisiert. Zukünftige Modellierungen von Kasernen können zur Validierung der Ergebnisse und für weitere Anpassungen, wie z. B. die Erstellung einer kasernenspezifischen Datenbank, genutzt werden. KW - Spreadsheet Energy System Model Generator KW - Gebäudeprofile KW - Urbane Energiesysteme KW - Kasernen KW - Energiesystemmodellierung Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178144 ER - TY - THES A1 - Sommer, Philipp T1 - Energiebedarfsbestimmung von Bestands-Wohngebäuden anhand von maschinellen Lernmethoden N2 - Energieausweise informieren über den Energiebedarf und -verbrauch von Gebäuden. Für die Erstellung eines Energieausweises werden gebäudespezifische Daten benötigt, weshalb sie oft nicht für alle Gebäude vorliegen oder erst durch eine Begehung vor Ort erfasst werden können. Die vorliegende Arbeit untersucht die Möglichkeit, durch die Identifikation eines Datenschemas, basierend auf einer integrativen Analyse von Energieausweisen, Energiebedarfsvorhersagen für unbekannte Wohngebäude zu treffen. Die Zielsetzung der vorliegenden Arbeit besteht in der Identifikation wesentlicher Merkmale aus offenen Datenquellen, welche den Energiebedarf signifikant beeinflussen sowie deren Integration in ein kompaktes und effizientes Regressionsmodell. Dabei werden verschiedene maschinelle Lernmethoden, insbesondere das Extreme Gradient Boosting (XGB), eingesetzt, um Modelle zu entwickeln und zu validieren, die auf Daten aus Energieausweisen basieren. Dafür werden unter anderem Merkmale aus den beschriebenen Merkmalen zum Dach, der Außenwände, zu Fenstern und zum Boden extrahiert und in neue Merkmale überführt. Dies sind unter anderem Dach- und Wandtyp, das zugehörige Isolationsniveau und der Verglasungsgrad der Fenster. Im Anschluss werden drei Datensätze entwickelt und auf ihre Leistung untersucht. Eine Analyse der Merkmalsrelevanz hat gezeigt, dass über alle Datensätze hinweg bestimmte Merkmale wie Gebäudetyp, Baujahr, Wohnfläche, Dämmungsgrad und geografische Lage entscheidenden Einfluss auf die Vorhersage des Energiebedarfs haben. Das auf den Fernerkundungsdaten basierte Modell, wies nach Optimierung ein Bestimmtheitsmaß R2 von 0,64 und einen mittleren absoluten Fehler (MAE) von 4,12 auf. Der Fehler bezieht sich auf eine Effizienzskala von 1-100 (Energieklasse G-A). Nach Skalierung der Pipeline und durch Ergänzung weiterer Datenpunkte, konnte der Wert auf 0,84 erhöht werden. Durch die Ergänzung von vebrauchsabhängigen Merkmalen, erreichte das XGB-Regressionsmodell ein R2 von 0,94 und einen MAE von 1,46 über den Trainings- und Testdatensatz. Zur weiteren Validierung werden die Auswirkungen der einzelnen Merkmale über Shapley-Werte quantifiziert, um die Auswirkungen der Merkmale bei der Vorhersage zu interpretieren. Die entwickelten Modelle erreichten eine hohe Prognosegenauigkeit und demonstrierten eine signifikante Verbesserung gegenüber herkömmlichen Methoden. Die Erstellung der Datensätze erfolgte unter Verwendung der Programmiersprache Python sowie des Frameworks Scikit-learn (Version 1.4.1) zur Entwicklung der Modelle. Die erzeugten Datensätze und Modelle wurden in eine reproduzierbare Pipeline überführt und stehen nach Freigabe unter GitHub zur Verfügung. N2 - Energy performance certificates provide information on the energy requirements and consumption of buildings. Building-specific data is required for the creation of an energy performance certificate, which is why it is often not available for all buildings or can only be recorded through an on-site inspection. This thesis investigates the possibility of making energy demand predictions for unknown residential buildings by identifying a data schema based on an integrative analysis of energy performance certificates. The objective of this thesis is to identify key features from open data sources that significantly influence energy demand and to integrate them into a compact and efficient regression model. Various machine learning methods, in particular Extreme Gradient Boosting (XGB), are used to develop and validate models based on data from energy performance certificates. In addition, features are extracted from the descriptive features for the roof, wall, windows and floor and transferred into new features. Subsequently, three data sets are developed and analysed for their performance. An analysis of feature relevance has demonstrated that across all data sets, specific features, such as building type, year of construction, living space, degree of insulation and geographical location, exert a significant influence on the prediction of energy demand. Following optimisation, the model based on remote sensing data exhibited a coefficient of determination R2 of 0.64 and an mean absolute error (MAE) of 4.12. The error refers to an efficiency scale of 1-100 (energy class G-A). Following scaling of the pipeline and the addition of further data points, the value increased to 0.84. The XGB regression model, which incorporates consumption-dependent characteristics, achieved an R2 of 0.94 and an MAE of 1.46 across the training and test data set. To further validate the model, the effects of the individual characteristics are quantified using Shapley values, which enable the interpretation of the characteristics’ effects on the prediction. The developed models achieved a high prediction accuracy and demonstrated a significant improvement over conventional methods. The data sets were created using the Python programming language and the Scikit-learn framework (version 1.4.1) to develop the models. The generated data sets and models were transferred to a reproducible pipeline and are available on GitHub after release. KW - Machine learning KW - Remote sensing KW - Energy label KW - Open data KW - Residential building Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-180188 ER - TY - RPRT ED - Vennemann, Peter ED - Klemm, Christian T1 - EGU Journal of Renewable Energy Short Reviews N2 - The EGU Journal of Renewable Energy Short Reviews (EGUJRenEnRev) is a teaching project rather that a regular scientific journal. To publish in this journal, it is a premise to take part in the master course wind power, hydro power and biomass usage at the faculty of Energy, Building Services and Environmental Engineering of the Münster University of Applied Sciences. Students receive an equivalent of 2.5 credit points (European Credit Transfer and Accumulation System - ECTS) for their engagement in the course and for publishing a short review article of at most 3000 words in this periodical. The publication process closely mimics the typical publication procedure of a regular journal. The peer-review process, however, is conducted within the group of course-participants. Although being just an exercise, we think that publishing the outcome of this course in a citable manner is not only promoting the motivation of our students, but may also be a helpful source of introductory information for researchers and practitioners in the field of renewable energies. We encourage students to write their articles in English, but this is not mandatory. The reader will thus find a few articles in German language. To further encourage students practicing English writing, perfect grammar is not part of the assessment. We especially thank our students for working with LaTeX on Overleaf, although LaTeX is new to some of them. In this way, the editorial workload was reduced to a minimum. We also thank our students for sharing their work under the creative commons attribution licence (CC-BY). I appreciate their contribution to scientific information, being available to every person of the world, almost without barriers. I also thank the corresponding authors and publishers of the cited work, for granting permission to reuse graphics free of charge. All other figures had to be replaced or removed prior to publication. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_00 Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136890 ER - TY - JOUR A1 - Ortmann, Thiark T1 - Effects of Noise Emissions from Offshore Wind Turbines on the Marine Environment JF - Educational Journal of Renewable Energy Short Reviews N2 - The pursuit of Offshore Wind Energy (OWE), integral to the German government’s ambitious renewable energy goals raises concerns about the environmental impact of noise emissions on marine life. This paper delves into the theoretical background of Offshore Wind Turbine (OWT) noise, exploring its various phases from the survey to decommission. It examines the types and causes of noise emissions, their effects on marine wildlife and potential mitigation measures. Highlighting the regulatory framework in Germany, the paper emphasises the need for nuanced approaches to balance renewable energy objectives with marine ecosystem preservation. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_09 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176460 SP - 53 EP - 60 ER - TY - JOUR ED - Vennemann, Peter ED - Klemm, Christian T1 - Educational Journal of Renewable Energy Short Reviews N2 - The Educational Journal of Renewable Energy Short Reviews (EduJRESR, formally published as `EGU Journal of Renewable Energy Short Reviews') is a teaching project rather than a regular scientific journal. To publish in this journal, it is a premise to take part in the master course wind power, hydro power and biomass usage at the department of Energy, Building Services and Environmental Engineering of the Münster University of Applied Sciences. Students receive an equivalent of 2.5 credit points (European Credit Transfer and Accumulation System - ECTS) for their engagement in the course and for publishing a short review article of at most 3000 words in this periodical. The publication process closely mimics the typical publication procedure of a regular journal. The peer-review process, however, is conducted within the group of course-participants. Although being just an exercise, we think that publishing the outcome of this course in a citable manner is not only promoting the motivation of our students, but may also be a helpful source of introductory information for researchers and practitioners in the field of renewable energies. We encourage students to write their articles in English, but this is not mandatory. The reader will thus find a few articles in German language. To further encourage students practicing English writing, perfect grammar is not part of the assessment. We especially thank our students for working with LaTeX on Overleaf, although LaTeX is new to some of them. In this way, the editorial workload was reduced to a minimum. We also thank our students for sharing their work under the creative commons attribution licence (CC-BY). We appreciate their contribution to scientific information, being available to every person of the world, almost without barriers. We also thank the corresponding authors and publishers of the cited work, for granting permission to reuse graphics free of charge. All other figures had to be replaced or removed prior to publication. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2023_00 Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-172599 ER - TY - JOUR ED - Vennemann, Peter ED - Klemm, Christian ED - Blankenstein, Benjamin T1 - Educational Journal of Renewable Energy Short Reviews N2 - The Educational Journal of Renewable Energy Short Reviews (EduJRESR, formally published as ‘EGU Journal of Renewable Energy Short Reviews’) is a teaching project rather than a regular scientific journal. To publish in this journal, it is a premise to take part in the master course wind power, hydro power and biomass usage at the department of Energy, Building Services and Environmental Engineering of the Münster University of Applied Sciences. Students receive an equivalent of 2.5 credit points (European Credit Transfer and Accumulation System – ECTS) for their engagement in the course and for publishing a short review article of at most 3 000 words in this periodical. The publication process closely mimics the typical publication procedure of a regular journal. The peer-review process, however, is conducted within the group of course-participants. Although being just an exercise, we think that publishing the outcome of this course in a citable manner is not only promoting the motivation of our students, but may also be a helpful source of introductory information for researchers and practitioners in the field of renewable energies. We encourage students to write their articles in English, but this is not mandatory. The reader will thus find a few articles in German language. To further encourage students practicing English writing, perfect grammar is not part of the assessment. We especially thank our students for working with LATEX on Overleaf, although LATEX is new to some of them. In this way, the editorial workload was reduced to a minimum. We also thank our students for sharing their work under the creative commons attribution licence (CC-BY). We appreciate their contribution to scientific information, being available to every person of the world, almost without barriers. We also thank the corresponding authors and publishers of the cited work, for granting permission. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_00 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176363 PB - FH Münster CY - Münster ER - TY - JOUR A1 - Finke, Tessa T1 - Drawing up a catalog of criteria for special solutions for fish passages based on the DWA-M 509 leaflet JF - Educational Journal of Renewable Energy Short Reviews N2 - The preservation of water bodies continuity is fundamental for aquatic communities, particularly for fish populations. Various structures impede watercourse continuity, impacting fish migration and habitat distribution. Conventional fish passages often fall short in diverse scenarios, prompting the development of specialized solutions. This article proposes a criteria catalog for these special fish passage solutions based on DWA leaflet DWA-A 509. It discusses the need for these solutions, presents a selection of specialized options, and outlines criteria from DWA-M 509, construction guidelines, and economic perspectives. It scrutinizes criteria ranging from target fish species to cost considerations. Three examples, including the Runserau fish lift, the bristle ramp fish lock, and the Fishcon sluice, illustrate these specialized solutions, their functionalities, advantages, and drawbacks. Additionally, the article compiles criteria from industry standards and guidelines into a comprehensive evaluation catalog. The criteria, when applied, assist in the selection of suitable fish passage solutions based on specific site conditions and fish species requirements. This holistic approach aims to optimize fishway selection, fostering the ecological sustainability of watercourses. However, this catalog remains dynamic and open to expansion with evolving research and practical application, urging further exploration and validation of these criteria through diverse case studies and technological advancements in the field. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_04 KW - fish passages KW - criteria catalog KW - DWA-M 509 KW - special solution KW - forms of evaluation Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176410 SP - 22 EP - 27 ER - TY - CHAP A1 - Nils, Siering A1 - Grüning, Helmut T1 - Divergierende Ziele bei der Bewirtschaftung von Baumrigolen T2 - Berichte aus der Siedlungswasserwirtschaft der Technischen Universität München Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-171886 SN - 0942-914X N1 - Link zum gesamten Tagungsband: https://www.tugraz.at/fileadmin/user_upload/tugrazExternal/c76c507b-d7bb-4008-944c-284302b6351a/PDFs/2023/Tagungsband/Tagungsband_AU2023.pdf VL - 227 SP - 232 EP - 241 CY - Garching ER - TY - JOUR A1 - Reintjes, Jannis T1 - Dismantling of wind turbines - An overview of methods JF - Educational Journal of Renewable Energy Short Reviews N2 - This paper outlines the three main areas relevant to dismantling: the rotor blades, hub and nacelle, the tower and the foundation. The paper discusses the dismantling procedures, including the removal of the top structure, the tower and the foundation, and evaluates various methods of dismantling the tower, such as modular dismantling, collapse blasting, folding blasting, wrecking ball demolition and hydraulic ram demolition. The assessment of these methods in practice and the potential challenges and considerations for future dismantling, particularly as wind turbine heights increase, are also addressed. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_11 KW - dismantling KW - disassembly KW - deconstruction KW - demolition KW - blasting Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176481 SP - 67 EP - 72 ER - TY - CHAP A1 - Blanco, Luis A1 - Groesdonk, Philip A1 - Singer, Larissa Celine A1 - Schmiedt, Jacob Estevam T1 - Datengetriebene Klassifizierung von städtischen Energieeinheiten für die Analyse des Wärme und Strombedarfs von Quartieren T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - Datengetriebene Klassifizierung von städtischen Energieeinheiten für die Analyse des Wärme- und Strombedarfs von Quartieren Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178332 SP - 1 EP - 1 CY - Steinfurt ER - TY - CHAP A1 - Schwarz, Timmy A1 - Gerling, Yannick T1 - Dashboard-Anwendung zur Eignungsbereichsdarstellung von Wärmeversorgungsoptionen (in Bremen) T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - Dashboard-Anwendung zur Eignungsbereichsdarstellung von Wärmeversorgungsoptionen (in Bremen) Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178434 SP - 1 CY - Steinfurt ER - TY - JOUR A1 - Plascher, Gregor T1 - Current systems and potential areas for tidal power plants - A review - Using the example of the United Kingdom JF - Educational Journal of Renewable Energy Short Reviews N2 - This review is about where and which tidal power systems are currently deployed. It starts with an insight into the variety of different tidal power systems. With the help of a list from the European Marine Energy Center about currently used systems for tidal power plants, it quickly becomes apparent that two systems stand out. These are the vertical and horizontal turbines. The latter are particularly common, as they are used for both tidal stream and tidal range power plants. Determining the regions with high potential for tidal power is not always easy due to the many influencing factors. Influencing factors are, for example form and conditions of the seabed, topographical features of the coast or currents in the sea [1]. Therefore, each region must be considered separately. n this paper the focus is on the UK, the literature shows that the coastal regions around the UK provide about 50 TWh/year of the European tidal power potential. This is due to the location between the oceans and the geological conditions, which act as a channel for the tides. The two areas with high potential where planning and construction of tidal power plants is currently underway are in the north of Scotland and in the southwest of England in the Bristol Channel. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2023_03 KW - renewable energy KW - tidal range KW - tidal current KW - ocean energy KW - potential areas Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-172622 SP - 16 EP - 20 ER - TY - THES A1 - Koert, Franziska T1 - Coupling Energy System Modeling with Life Cycle Assessment N2 - When simulating and optimizing urban energy systems, the focus is usually on minimizing financial costs or greenhouse gas (GHG) emissions. As energy systems transition towards a growing share of renewable energy sources and technological complexity, environmental impacts that affect more than just GHG emissions, such as resource extractions, water and land use impacts or impacts on human health, are becoming increasingly relevant. To address this gap, this thesis introduces an automated coupling procedure for energy system modeling (ESM) and life cycle assessment (LCA). The implementation includes general recommendations and a practical coupling of the Open Energy Modelling Framework (oemof) based Spreadsheet Energy System Model Generator (SESMG) with a suitable LCA software. The LCA procedure involves goal and scope definition, inventory analysis, impact assessment, and interpretation. To adapt these steps to different energy system models, the LCA should be attributional, process-based and territorial. Further, the openLCA software by Green-Delta serves as a suitable soft-linking tool. The main challenge of the coupling procedure is the inventory analysis. Data collection faces limitations, reasoned by the commercialization and high maintenance efforts in open-source databases. After evaluating free databases, the Prozessorientierte Basisdaten für Umweltmanagement-Instrumente (ProBas) database of the Umweltbundesamt emerged as the most suitable choice for the coupling. However, also this database lacks traceability of datasets or compatibility with a comprehensive impact assessment. A generalized framework for the LCA application of energy systems was developed. The framework is based on an ex-post LCA assessment that considers the combination of the two approaches within every step of the procedure. Main considerations of this framework include automatic calculations of the inventory analysis and the impact assessment for different energy technologies, as well as calculations summed up for all technologies of energy system scenarios. Further, technology mapping and data harmonization are essential considerations for the automatic coupling and double counting of impacts needs to be avoided. Subsequently, the framework is realized with the adaption of the SESMG. Its database-independent realization allows compatibility with different databases in openLCA. For the selected ProBas database, the tool can be used with different available energy technologies. The use of unit processes is encouraged for data harmonization. Result interpretation of the LCA (in general or with the SESMG) should not solely focus on the absolute values of the impact categories, but rather on the comparative strengths among scenarios and technologies. The successful application to a reference single-family building using the ProBas database revealed varied environmental impacts, in relation with a higher reduction in GHG emissions, with an increase of 11 % in terrestrial acidification impacts in the emission-optimized scenario. These findings emphasize a more comprehensive perspective on environmental impacts and provide a valuable validation of the developed methodology. Future research should include the improvement of data harmonization, the inclusion of more datasets for a more customized analysis of energy systems and more applications. The coupled approach offers a promising avenue for gaining deeper insights into optimizing urban energy systems. KW - Energy system modeling KW - Urban energy system KW - Life cycle assessment KW - Spreadsheet Energy System Model Generator KW - OpenLCA Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178803 ER - TY - RPRT A1 - Linnenschmidt, Jan-Niklas T1 - Cost comparison between bottom-fixed and floating offshore wind turbines - Calculating LCOE based on full hours of utilization and corresponding break-even points N2 - Originally this article was supposed to be a comparison between the technological differences of bottom-fixed offshore wind turbines (BOWT) and floating offshore wind turbines (FOWT). However, several authors already contributed to this topic and came to the conclusion that the higher levelized costs of energy (LCOE) prevent FOWTs from successfully entering the energy market. Multiple sources seem to agree on this conclusion but often do not provide the reader with further information regarding the LCOE. This is the reason why this article understands itself as an in depth cost comparison between BOWTs and FOWTs. For this purpose, individual LCOE are calculated for the upcoming FOWT technologies such as spar-buoy (SPAR), tension-leg platform (TLP) and semi-submersible platform (semi-sub) as well as conventional BOWTs using the wind turbines hours of full utilization (HOFU). The resulting functions are visualized graphically in order to determine break-even points between BOWTs and FOWTs. Finally, a sensitivity analysis is carried out to determine the influence of the weighted average costs of capital (WACC). T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_02 KW - cost comparison KW - bottom-fixed KW - floating KW - offshore wind turbines KW - LCOE Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136764 ER - TY - JOUR A1 - Krehenbrink, Julian T1 - Comparison of small wind turbines for urban areas, a market analysis JF - Educational Journal of Renewable Energy Short Reviews N2 - This document presents a comparative analysis of horizontal and vertical small wind turbines for urban areas in three power classes up to 10 kW in different categories. The main objective was to conduct a market analysis to assess the marketability of these wind energy systems. The aim was to make it easier for potential customers to make a decision. However, due to the limited availability of data, the project encountered considerable difficulties. As a result, the study became a comparative assessment, which led to results that may not be readily transferable to urban environments, slightly missing the original objective of the study. The results underline the difficulties associated with conducting a comprehensive market analysis in this sector and highlight the need for an independent series of tests under specific conditions. The paper concludes with a plea for future research efforts to adapt data collection methods to urban conditions in order to improve the relevance and applicability of such studies in practice. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2024_06 Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-176430 SP - 33 EP - 40 ER - TY - JOUR A1 - Dresemann, Oliver T1 - Challenges for the construction of an underground hydroelectric power plant with electricity storage (UPSHP) in terms of public acceptance and technical aspects - A Summary JF - Educational Journal of Renewable Energy Short Reviews N2 - For the increasingly important storage of renewably generated electricity, this review explains the construction of a surface and underground pumped storage power plant. The problems for the construction of an underground pumped storage power plant are further listed. These are geological, environmental and economic problems as well as a low acceptance by the population. The geological problems are concerns about leaching of minerals and heavy metals as well as the statics of the cavities. Mining companies in Germany are obligated to renaturalize the landscape areas again, which could be realised by a lake. Furthermore, care must be taken to ensure that the mine water does not come into contact with the groundwater. According to a survey by RISP on the subsequent use of the mine areas for an underground pumped storage power plant, the acceptance of the population is over 70 percent. The economic consideration concludes that the arbitrage profit for a difference between off-peak and peak of 10 €/MWh is about 2.7 M€/a and for 100 €/MWh about 27.3 M€/a. With investment costs of about 630 M€, despite the assumption of 100 €/MWh, more than 20 years are needed for an underground pumped storage power plant to be amortized. The acceptance could be increased by creating a lake as a recreation area as well as being used as an upper storage reservoir. Thus, the cost of renaturation decrease when combined with the creation of the storage basin. The problem of ground conditions can be solved by creating new cavities by means of tunnel boring at an inclination. For static safety as well as against leaching of minerals and heavy metals, the cavity walls can be sealed with reinforced concrete. The technology of underground pumped storage power plants can be used for better utilisation of renewable energies. This is especially in flat and densely populated regions a possibility to store energy, because the main part of the power plant is underground. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2023_01 KW - PSH KW - PSHP KW - UPSH KW - UPSHP KW - renewable energy Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-172607 SP - 3 EP - 7 ER - TY - CHAP A1 - Schomaker, Marion A1 - Kamphus, Sören A1 - Brügging, Elmar T1 - BIOREST - Regionale Vorbehandlungskonzepte zur nachhaltigen Reststoffnutzung in Biogasanlagen T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - BIOREST - Regionale Vorbehandlungskonzepte zur nachhaltigen Reststoffnutzung in Biogasanlagen Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178425 SP - 1 CY - Steinfurt ER - TY - THES A1 - Becker, Gregor T1 - Bereitstellung von Open Source Software in der Energiewirtschaft – Ein Leitfaden N2 - Programmierung von Open Source Software in der Energiewirtschaft nimmt seit Beginn der 2000er stetig zu. Dies gilt sowohl für den Bereich der Forschung und Entwicklung, als auch für die Industrie und Wirtschaft. So werden beispielsweise Modelle zur Planung und Optimierung von Energiesystemen umgesetzt. Eine Open Source Veröffentlichung ist in diesem Forschungsfeld besonders wichtig, um die Überprüfbarkeit von Modellannahmen sowie der Vergleichbarkeit verschiedener Modellansätze zu garantieren. Einer Open-Source Veröffentlichung stehen jedoch häufig die Hürden von hohem Fristendruck, fehlender Finanzierung und fehlendem Detailwissen der Publizierenden entgegen. Deshalb bleiben diese Softwareprodukte meist im Entwurfsstadium und sind daher schwierig wieder zu verwenden. Mithilfe des neu erarbeiteten Schritt-für-Schritt Leitfadens zur standardisierten Implementierung einer Open Source Software, wird die Hürde und der zeitliche Aufwand zur Standardisierung von Open Source Repositories weitestgehend reduziert. Hierbei wird für jedem Bestandteil des zu standardisierenden Repositorys eine umfassende Erklärung der üblichen Standards sowie eine Empfehlung für unterstützende Softwarelösungen ausgesprochen. Der Leitfaden orientiert sich an den aus der ISO 12207 resultierenden Phasen des Softwarelebenszyklus und ermöglicht einen Einstieg zu jedem Entwicklungsstand der Software. Seine grafische Aufbereitung in Form eines Prozessablaufplans erleichtert die Einschätzung des individuellen Status der Standardisierung eines vorliegenden Open Source Projektes. Als Treiber der Standardisierung eines Open Source Projektes sind insbesondere die bessere Lesbarkeit, Wartbarkeit und Testbarkeit der standardisierten Open Source Software wichtig. Bei der Anwendung auf das bereits bestehende Open Source Projekt des Spreadsheet Energy System Model Genarators fiel auf, dass ein verspäteter Einstieg in ein systematisches Vorgehen (wie er mit dem Leitfaden dieser Arbeit gegeben wird) zu erheblichen Mehraufwand bei der Standardisierung führen kann. Dennoch konnten im Zuge der Umsetzung des erarbeiteten Leitfadens weitreichende Verbesserungen des Projektes vor dem Hintergrund der Standardisierung erreicht werden (z. B. Versionierung & Wartbarkeit). Insgesamt lässt sich festhalten, dass eine frühestmögliche Standardisierung der Open Source Repositories durchgeführt werden sollte, um spätere Mehrarbeit zu vermeiden und die frühstmögliche Wiederverwendbarkeit für Dritte zu gewährleisten. Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-170785 ER - TY - CHAP A1 - Groesdonk, Philip A1 - Blanco, Luis A1 - Singer, Larissa Celine A1 - Schmiedt, Jacob Estevam T1 - Automatisierte Erstellung von energetischen Gebäudemodellen als georeferenzierter Grundlagendatensatz für Wärmewendeprojekte T2 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Poster - Automatisierte Erstellung von energetischen Gebäudemodellen als georeferenzierter Grundlagendatensatz für Wärmewendeprojekte Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-178399 SP - 1 CY - Steinfurt ER - TY - RPRT A1 - Wagenknecht, Fiona T1 - Assessment of noise mitigation measures during pile driving of larger offshore wind foundations N2 - Wind energy is an important source of electricity generation, but the construction of offshore wind foundations causes high underwater sound pressure, harming marine life. In this context limiting values for underwater noise emissions were set to protect the marine flora and fauna. Therefore, noise mitigation measures during pile driving are mandatory to comply with these limits. Current development in the wind industry lead to increasing wind turbine sizes, requiring a larger pile diameter, which leads to higher underwater noise emissions. As a result, the state of the art noise mitigation systems might not be sufficient and a combination of different technologies is necessary. This article focuses on the issue of noise mitigation during pile driving with respect to large pile sizes. First, the most tested and proven noise mitigation techniques (big bubble curtain, hydro sound damper, and IHC-noise mitigation system) are described, following an analysis of noise reduction measurements in applications at different offshore wind farm projects. In the end the suitability of current noise mitigation systems for large monopiles is evaluated, regarding their effectiveness and practicability. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_04 KW - Noise mitigation measures KW - Offshore wind foundations KW - Big bubble curtain KW - Hydro sound damper KW - IHC-noise mitigation system Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136786 ER - TY - RPRT A1 - Budde, Janik T1 - A comparison of reverse electrodialysis and pressure retarded osmosis as technologies for salinity gradient power N2 - The global salinity gradient power (SGP) potential is between 1650 - 2000 TWH/a and can be converted by mixing two solutions with different salinities. The harnessing of SGP for conversion into power can be accomplished by means of pressure retarded osmosis (PRO) and reverse electrodialysis (RED). PRO and RED are membrane-based technologies and have different working principles. PRO uses a semipermeable membrane to seperate a concentrated salt solution from a diluted solution. The diluted solution flows through the semipermeable membrane towards the concentrated solution, which increases the pressure within the concentrated solution chamber. The pressure is balanced by a turbine and electricity is generated. RED uses the transport of ions through cation and anion exchange membranes. The chambers between the membranes are alternately filled with a concentrated and diluted solution. The salinity gradient difference is the driving force in transporting ions that results in an electric potential, which is then converted to electricity. The comparison shows that there are two different fields of application for PRO and RED. PRO is especially suitable at extracting salinity energy from large concentration differences. In contrast, RED are not effect by increasing concentration differences. So PRO are supposed to focus on applications with brines or waste water and RED on applications with river water and seawater. Moreover, just a few measured values from processes under real conditions are available, which makes it difficult to compare PRO and RED. T3 - EGU Master Journal of Renewable Energy Short Reviews - 2021_14 KW - osmotic power KW - salinity gradient power KW - salinity gradient energy KW - blue energy KW - pressure retarded osmosis Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-136882 ER - TY - BOOK A1 - Wetter, Christof A1 - Brügging, Elmar T1 - 16. Steinfurter Bioenergiefachtagung - Tagungsband N2 - Dieser Tagungsband umfasste eine Übersicht zu den Vorträgen, Ausstellern sowie die Abstracts der Poster-Präsentation auf der 16. Bioenergiefachtagung. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:836-opus-177896 CY - Steinfurt ER -