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Experimental Evaluation of the Power Output and Efficiency of a Small Solar-Boosted OTEC Power Plant

Author

Listed:
  • Reemal D. Prasad

    (Division of Mechanical Engineering, The University of the South Pacific, Laucala Campus, Suva, Fiji)

  • Muzammil Ali

    (Division of Mechanical Engineering, The University of the South Pacific, Laucala Campus, Suva, Fiji)

  • Mohammed Rafiuddin Ahmed

    (Division of Mechanical Engineering, The University of the South Pacific, Laucala Campus, Suva, Fiji)

Abstract

Ocean thermal energy is an emerging energy source that holds great promise, especially for tropical countries. Ocean thermal energy conversion (OTEC) efficiency can be improved by raising the temperature difference between the hot water and the cold water. In the work reported here, a laboratory-scale closed-cycle OTEC system was constructed and tested for power output and efficiency. A solar heating system heated the water up to 70 °C. Experiments were conducted at cold water inlet temperatures of 5 °C, 8 °C, and 11 °C. The mass flow rate of the hot water was varied, while that of the cold water was kept constant. Increasing the hot water inlet temperature from 30 °C to 70 °C while keeping the cold water inlet temperature constant at 5 °C at the highest mass flow rate of hot water increased the power output from 32.07 W to 66.68 W (107.9% increase) and the thermal efficiency from 1.96% to 4.37% (123% increase). The pressure drop across the turbine was higher for a larger temperature difference between the hot water and cold water, indicating a higher transfer of energy to the working fluid. Increasing the mass flow rate of the hot water for the increasing temperature difference between the hot water and cold water increased the power output and efficiency due to the increase in the energy transfer from the hot water to the working fluid. Experimental works on solar-boosted OTEC systems are very rare, and this work should pave the way for practical implementation.

Suggested Citation

  • Reemal D. Prasad & Muzammil Ali & Mohammed Rafiuddin Ahmed, 2024. "Experimental Evaluation of the Power Output and Efficiency of a Small Solar-Boosted OTEC Power Plant," Energies, MDPI, vol. 18(1), pages 1-28, December.
    • Handle: RePEc:gam:jeners:v:18:y:2024:i:1:p:127-:d:1557790
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    References listed on IDEAS

    as
    1. Langer, Jannis & Quist, Jaco & Blok, Kornelis, 2020. "Recent progress in the economics of ocean thermal energy conversion: Critical review and research agenda," Renewable and Sustainable Energy Reviews, Elsevier, vol. 130(C).
    2. Semmari, Hamza & Stitou, Driss & Mauran, Sylvain, 2012. "A novel Carnot-based cycle for ocean thermal energy conversion," Energy, Elsevier, vol. 43(1), pages 361-375.
    3. Hu, Zheng & Wan, Yueru & Zhang, Chengbin & Chen, Yongping, 2022. "Compression-assisted absorption refrigeration using ocean thermal energy," Renewable Energy, Elsevier, vol. 186(C), pages 755-768.
    4. Osorio, Andrés F. & Arias-Gaviria, Jessica & Devis-Morales, Andrea & Acevedo, Diego & Velasquez, Héctor Iván & Arango-Aramburo, Santiago, 2016. "Beyond electricity: The potential of ocean thermal energy and ocean technology ecoparks in small tropical islands," Energy Policy, Elsevier, vol. 98(C), pages 713-724.
    5. Zhang, Chengbin & Wu, Zhe & Wang, Jiadian & Ding, Ce & Gao, Tieyu & Chen, Yongping, 2023. "Thermodynamic performance of a radial-inflow turbine for ocean thermal energy conversion using ammonia," Renewable Energy, Elsevier, vol. 202(C), pages 907-920.
    6. Chen, Fengyun & Liu, Lei & Peng, Jingping & Ge, Yunzheng & Wu, Haoyu & Liu, Weimin, 2019. "Theoretical and experimental research on the thermal performance of ocean thermal energy conversion system using the rankine cycle mode," Energy, Elsevier, vol. 183(C), pages 497-503.
    7. Zereshkian, Sajjad & Mansoury, Dariush, 2021. "A study on the feasibility of using solar radiation energy and ocean thermal energy conversion to supply electricity for offshore oil and gas fields in the Caspian Sea," Renewable Energy, Elsevier, vol. 163(C), pages 66-77.
    8. Khosravi, A. & Syri, Sanna & Assad, M.E.H. & Malekan, M., 2019. "Thermodynamic and economic analysis of a hybrid ocean thermal energy conversion/photovoltaic system with hydrogen-based energy storage system," Energy, Elsevier, vol. 172(C), pages 304-319.
    9. Faizal, Mohammed & Ahmed, M. Rafiuddin, 2013. "Experimental studies on a closed cycle demonstration OTEC plant working on small temperature difference," Renewable Energy, Elsevier, vol. 51(C), pages 234-240.
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