Publikationen

2021

• Coupled power plant and geostorage simulations of porous media compressed air energy storage (PM-CAES)

  Pfeiffer, W. T., Witte, F., Tuschy, I., & Bauer, S. (2021). Coupled power plant and geostorage simulations of porous media compressed air energy storage (PM-CAES). Energy Conversion And Management, 249, 114849. http://doi.org/https://doi.org/10.1016/j.enconman.2021.114849

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  Porous media compressed air energy storage (PM-CAES) systems that use porous geological formations such as sandstone may provide large storage capacities in future energy systems based primarily on fluctuating renewable energy sources. In CAES systems, the instantaneous power and stored energy are closely linked to the storage pressure and the mass flow rate achievable in the geological reservoir. Therefore, a coupled simulator that accurately represents the power plant, the geostorage site, and their interactions during all potential PM-CAES system operation modes is presented in this paper. Using adiabatic and diabatic power plant topology test designs, strong feedback between the achievable storage rates and capacities of the chosen power plant design and geostorage site are found, thus confirming the benefit of this integrated modelling approach. Using a generic, highly cyclic load profile for daily peak shaving with charging and discharging rates of 100 MW and an adiabatic power plant topology, it is found that all discharging targets can be met but the achievable charging rates decrease to approximately 95 MW due to increased pressure in the geostorage after approximately 10 cycles. When a diabatic power plant design is considered, a long-term decrease in the geostorage pressure is found. Correspondingly, the charging power always meets the specifications, while the discharging power decreases slowly from the 20th storage cycle onwards to 79 MW in the 31st cycle. The newly developed simulation tool thus allows one to predict achievable power rates and geostorage pressures for PM-CAES systems, enabling the identification of efficient PM-CAES designs.

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    • Witte, Francesco
    • Tuschy, Ilja

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  • 2021
  • Journal Article
  • • Wolf Pfeiffer
    • Francesco Witte
    • Ilja Tuschy
    • Sebastian Bauer
  • • PM-CAES
    • Compressed air energy storage
    • Geological storage
    • Coupled simulations

• Grid Support with Wind Turbines: The Case of the 2019 Blackout in Flensburg

  Gloe, A., Jauch, C., & Räther, T. (2021). Grid Support with Wind Turbines: The Case of the 2019 Blackout in Flensburg. Energies, 14(6), 1697. http://doi.org/10.3390/en14061697

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  The work presented in this paper aims to show how modern wind turbines can help to control the frequency in a small grid which suffers from large power imbalances. It is shown for an exemplary situation, which occurred in Flensburg’s distribution grid in 2019: a major blackout, which occurred after almost two hours in islanding operation, affecting almost the entire distribution grid, which supplies approximately 55,000 households and businesses. For the analysis, a wind turbine model and a grid support controller developed at the Wind Energy Technology Institute are combined with real measurements from the day of the blackout to generate a fictional yet realistic case study for such an islanding situation. For this case study, it is assumed that wind turbines with grid support functionalities are connected to the medium voltage distribution grid of the city. It is shown to what extent wind turbines can help to operate the grid by providing grid frequency support in two ways: By supplying synthetic inertia only, where the wind turbines can help to limit the rate of change of frequency in the islanded grid directly after losing the connection to the central European grid. In combination with the primary frequency control capabilities of the wind turbines (WTs), the disconnection of one gen set in the local power station might have been avoided. Furthermore, wind turbines with primary frequency control capabilities could have restored the grid frequency to 50 Hz shortly after the islanding situation even if the aforementioned gen-set was lost. This would have allowed connecting a backup medium voltage line to the central European grid and thereby avoiding the blackout.

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  • Personenseiten

    • Gloe, Arne
    • Jauch, Clemens

  • Forschungsprojekt

    • Grenzland INNOVATIV Schleswig-Holstein

  • Abteilung/Einrichtung

    • Wind Energy Technology Institute

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  • 2021
  • Journal Article
  • • Arne Gloe
    • Prof. Dr. Clemens Jauch
    • Thomas Räther
  • • WETI

• Abschlussbericht New 4.0, Norddeutsche Energiewende, SINTEG Teilprojekt AP 7: Aus- und Weiterbildung

  Faber, P. D. -I. T., & Rogalla, I. (2021). Abschlussbericht New 4.0, Norddeutsche Energiewende, SINTEG Teilprojekt AP 7: Aus- und Weiterbildung.

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    • Faber, Torsten

  • Abteilung/Einrichtung

    • Wind Energy Technology Institute

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  • 2021
  • Report
  • • Prof. Dr.-Ing. Torsten Faber
    • I. Rogalla
  • • WETI

• Adapting Behavior Driven Development (BDD) for large-scale software systems

  Irshad, M., Britto, R., & Petersen, K. (2021). Adapting Behavior Driven Development (BDD) for large-scale software systems. Journal Of Systems And Software, 177, 110944.

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    • Petersen, Kai

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  • 2021
  • Journal Article
  • • Mohsin Irshad
    • Ricardo Britto
    • Kai Petersen

• Tower and Foundation

  Faber, P. D. -I. T. (2021). Tower and Foundation. In Understanding Wind Power Technology, Theory, Deployment and Optimisation. John Wiley & Sons.

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    • Faber, Torsten

  • Abteilung/Einrichtung

    • Wind Energy Technology Institute

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  • 2021
  • Book Chapter
  • • Prof. Dr.-Ing. Torsten Faber
  • • WETI

• Entrepreneurship Education als Beitrag zur Weiterung der Horizonte

  Ebbers, I. (2021). Entrepreneurship Education als Beitrag zur Weiterung der Horizonte.

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  [... Der Beitrag] verfolgt die Frage, wie eine Entrepreneurship Education, verstanden als Erziehung zum unternehmerisches Denken und Handeln, im Rahmen allgemein-bildender Beschulung und mit dem Ziel einer allgemeinbildenden Wirksamkeit so angelegt werden kann, dass sie einen Beitrag zur Horizontweitung der Lernenden leisten kann. Um diese Frage beantworten zu können, soll im weiteren Verlauf der Bildungsbegriff nach Klafki genutzt werden. Er bezieht sich hier im Wesentlichen auf vier Aufgaben der Bildung, welche im Folgenden vor dem Hintergrund der hier gemeinten Entrepreneurship Education genauer betrachtet werden sollen. (DIPF/Orig.).

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  • Abteilung/Einrichtung

    • Jackstädt-Zentrum Flensburg (JZF)

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  • 2021
  • Miscellaneous
  • • Ilona Ebbers

• Delegating Supersingular Isogenies over F_p^2 with Cryptographic Applications

  Pedersen, R., & Uzunkol, O. (2021). Delegating Supersingular Isogenies over F_p^2 with Cryptographic Applications. Iacr Cryptol. Eprint Arch., 2021, 506. Abgerufen von https://eprint.iacr.org/2021/506

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  • Personenseiten

    • Uzunkol, Osmanbey

  • Fachbereich

    • Fachbereich 3: Information und Kommunikation

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  • 2021
  • Journal Article
  • • Robi Pedersen
    • Osmanbey Uzunkol

• Kompetenzen für eine digitale Welt

  Bertel, S., Beck, L., Clausen, B., & Räker, T. (2021). Kompetenzen für eine digitale Welt. Wie viel Wissenschaft braucht die Lehrerfortbildung? Arbeitsbündnisse im analogen und virtuellen Raum. Universität Regensburg.

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  • Personenseiten

    • Bertel, Sven

  • Abteilung/Einrichtung

    • CIVU – Center for Interaction, Visualization and Usability

  • Fachbereich

    • Fachbereich 3: Information und Kommunikation

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  • 2021
  • Conference Proceedings
  • • Sven Bertel
    • Lena Beck
    • Bernd Clausen
    • Timo Räker

• Spielwiese und Impulsgeber zugleich : wie Corporate Influencer die Organisation verändern

  Reimer, T., Heidenreich, M., & Herbert, O. (2021). Spielwiese und Impulsgeber zugleich : wie Corporate Influencer die Organisation verändern. Organisationsentwicklung : Zeitschrift für Unternehmensentwicklung und Change Management. Düsseldorf: Solutions by Handelsblatt Media Group GmbH.

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  • Abteilung/Einrichtung

    • Jackstädt-Zentrum Flensburg (JZF)

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  • 2021
  • Miscellaneous
  • • Tanja Reimer
    • Markus Heidenreich
    • Oliver Herbert

• Namibian State of Logistics 2020 Report

  Oelze, N., Simasiku, B. M., & Jackie, L. L. (2021). Namibian State of Logistics 2020 Report. Windhoek: Namibian-German Centre for Logistics. Abgerufen von https://www.giz.de/en/downloads/NGCL_Namibia-State-of-Logistics_Report2020-1.pdf

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  This document has been prepared to summarise the findings of a study carried out by the Namibian-German Centre for Logistics into the current state of logistics in Namibia during the period from 2018 to 2020 and the impact of the Covid-19 pandemic on the industry. It updates studies carried into Namibian logistics in 2012 and 2018. The study has been undertaken by the research team on an wholly independent basis making use of contemporary data available in the public domain and surveys conducted by the team. It reflects the opinions of the authors based of review and analysis of the available evidence.

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  • Fachbereich

    • Fachbereich 4: Wirtschaft

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  • 2021
  • Report
  • • Nelly Oelze
    • Brighten Simasiku
    • Lydia Jackie