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Design and performance analysis of radial-inflow turboexpander for OTEC application

Author

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  • Nithesh, K.G.
  • Chatterjee, Dhiman
  • Oh, Cheol
  • Lee, Young-Ho

Abstract

Ocean thermal energy conversion (OTEC) is a potential source of renewable energy. In order to design a turbine for maximizing the output power for very low working temperature application like OTEC, careful one-dimensional design followed by detailed three dimensional simulation is required. In this work a radial-inflow turbine with R-22 as working fluid is designed for a closed-cycle ocean thermal energy conversion plant of 2 kWe capacity. Design speed of the turbine is 34000 rpm. Inlet and outlet temperatures of designed turbine are 24.5 °C and 14 °C respectively. Three-dimensional fluid flow analysis inside the turbine at design and off-design conditions were carried out. Important dimensions of the turbine are: rotor tip and shroud radii of 24 mm and 19 mm respectively; blade widths at rotor inlet and outlet of 6 mm and 11 mm respectively; axial length of 17.5 mm; diffuser of 62 mm long. Volute casing designed has a circular cross section. The importance of the number of blades, blade filleting and stagger angle from the point of view of turbine performance are reported.

Suggested Citation

  • Nithesh, K.G. & Chatterjee, Dhiman & Oh, Cheol & Lee, Young-Ho, 2016. "Design and performance analysis of radial-inflow turboexpander for OTEC application," Renewable Energy, Elsevier, vol. 85(C), pages 834-843.
    • Handle: RePEc:eee:renene:v:85:y:2016:i:c:p:834-843
    DOI: 10.1016/j.renene.2015.07.018
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    References listed on IDEAS

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    Citations

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    Cited by:

    1. Nithesh, K.G. & Chatterjee, Dhiman, 2016. "Numerical prediction of the performance of radial inflow turbine designed for ocean thermal energy conversion system," Applied Energy, Elsevier, vol. 167(C), pages 1-16.
    2. Zou, Aihong & Chassaing, Jean-Camille & Persky, Rodney & Gu, YuanTong & Sauret, Emilie, 2019. "Uncertainty Quantification in high-density fluid radial-inflow turbines for renewable low-grade temperature cycles," Applied Energy, Elsevier, vol. 241(C), pages 313-330.
    3. Kim, Do-Yeop & Kim, You-Taek, 2017. "Preliminary design and performance analysis of a radial inflow turbine for ocean thermal energy conversion," Renewable Energy, Elsevier, vol. 106(C), pages 255-263.
    4. Zhang, Wei & Li, Ye & Wu, Xiaoni & Guo, Shihao, 2018. "Review of the applied mechanical problems in ocean thermal energy conversion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 93(C), pages 231-244.
    5. Peng, Ningjian & Wang, Enhua & Wang, Wenli, 2023. "Design and analysis of a 1.5 kW single-stage partial-admission impulse turbine for low-grade energy utilization," Energy, Elsevier, vol. 268(C).
    6. Bernardoni, C. & Binotti, M. & Giostri, A., 2019. "Techno-economic analysis of closed OTEC cycles for power generation," Renewable Energy, Elsevier, vol. 132(C), pages 1018-1033.
    7. 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.
    8. Chen, Yun & Liu, Yanjun & Liu, Weimin & Ge, Yunzheng & Xue, Yifan & Zhang, Li, 2022. "Optimal design of radial inflow turbine for ocean thermal energy conversion based on the installation angle of nozzle blade," Renewable Energy, Elsevier, vol. 184(C), pages 857-870.

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    More about this item

    Keywords

    OTEC; Renewable energy; Radial inflow turbine; R22 working fluid;
    All these keywords.

    JEL classification:

    • R22 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Household Analysis - - - Other Demand

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