IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v170y2021icp1353-1366.html
   My bibliography  Save this article

Off-design performance of closed OTEC cycles for power generation

Author

Listed:
  • Giostri, Andrea
  • Romei, Alessandro
  • Binotti, Marco

Abstract

The present study illustrates the development of a detailed model to estimate the part-load performance of an ammonia closed OTEC system for on-shore installations. A previously published Matlab® suite is extended by accounting for off-design conditions in terms of variable seawater temperature and mass flow on the cycle performance. The off-design behavior of each component is thoroughly discussed, with particular attention devoted to the single-stage axial-flow turbine, whose performance maps are obtained by means of three-dimensional CFD simulations. Assuming a representative plant sized for warm seawater temperature of 28 °C and cold seawater temperature of 4 °C (8500 kg/s taken from 1000 m depth), the model predicts an annual electricity yield of 15.963 GWhe and LCOE of 316 €/MWhe when including seawater measured data of a simile-Hawaiian site. Moreover, a sensitivity analysis is assessed in order to identify the best design parameters (i.e. warm seawater temperature and cold seawater mass flow rate) that minimize the LCOE for the given location. The new design guarantees a reduction of approximately 11% of the LCOE (284 €/MWhe). The simulation capabilities of the developed model prove it as valuable tool to estimate the OTEC competitiveness in different scenarios.

Suggested Citation

  • Giostri, Andrea & Romei, Alessandro & Binotti, Marco, 2021. "Off-design performance of closed OTEC cycles for power generation," Renewable Energy, Elsevier, vol. 170(C), pages 1353-1366.
    • Handle: RePEc:eee:renene:v:170:y:2021:i:c:p:1353-1366
    DOI: 10.1016/j.renene.2021.02.047
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148121002159
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2021.02.047?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Chen, Fengyun & Liu, Lei & Zeng, Hao & Peng, Jingping & Ge, Yunzheng & Liu, Weimin, 2024. "Theoretical and experimental study on the secondary heat recovery cycle of the mixed working fluid in ocean thermal energy conversion," Renewable Energy, Elsevier, vol. 227(C).
    2. Langer, Jannis & Infante Ferreira, Carlos & Quist, Jaco, 2022. "Is bigger always better? Designing economically feasible ocean thermal energy conversion systems using spatiotemporal resource data," Applied Energy, Elsevier, vol. 309(C).
    3. Hu, Zheng & Chen, Yongping & Zhang, Chengbin, 2024. "Role of R717 blends in ocean thermal energy conversion organic Rankine cycle," Renewable Energy, Elsevier, vol. 221(C).
    4. Hall, Kashawn & Kelly, Solange & Henry, Legena, 2022. "Site selection of Ocean Thermal Energy Conversion (OTEC) plants for Barbados," Renewable Energy, Elsevier, vol. 201(P2), pages 60-69.
    5. Xiaowei Yang & Yanjun Liu & Yun Chen & Li Zhang, 2022. "Optimization Design of the Organic Rankine Cycle for an Ocean Thermal Energy Conversion System," Energies, MDPI, vol. 15(18), pages 1-19, September.
    6. Mao, Liangjie & Wei, Changjiang & Zeng, Song & Cai, Mingjie, 2023. "Heat transfer mechanism of cold-water pipe in ocean thermal energy conversion system," Energy, Elsevier, vol. 269(C).
    7. Yang, Min-Hsiung & Yeh, Rong-Hua, 2022. "Investigation of the potential of R717 blends as working fluids in the organic Rankine cycle (ORC) for ocean thermal energy conversion (OTEC)," Energy, Elsevier, vol. 245(C).
    8. Chen, Ruihua & Deng, Shuai & Zhao, Li & Zhao, Ruikai & Xu, Weicong, 2022. "Energy recovery from wastewater in deep-sea mining: Feasibility study on an energy supply solution with cold wastewater," Applied Energy, Elsevier, vol. 305(C).
    9. Peng, Jingping & Ge, Yunzheng & Chen, Fengyun & Liu, Lei & Wu, Haoyu & Liu, Weimin, 2022. "Theoretical and experimental study on the performance of a high-efficiency thermodynamic cycle for ocean thermal energy conversion," Renewable Energy, Elsevier, vol. 185(C), pages 734-747.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:170:y:2021:i:c:p:1353-1366. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.