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Pumping power minimization of an evaporator in ocean thermal energy conversion system based on constructal theory

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  • Wu, Zhixiang
  • Feng, Huijun
  • Chen, Lingen
  • Xie, Zhuojun
  • Cai, Cunguang

Abstract

Constructal design of an evaporator in ocean thermal energy conversion system (OTECS) is carried out by taking the minimum dimensionless pumping power (DPP) as optimization objective. The effective volume and heat transfer rate (HTR) of the evaporator are taken as constraints in the constructal optimization. The optimal heat transfer plate (HTP) width of the evaporator is obtained. The effects of the structure and flow parameters and types of working fluid on the minimum DPP and optimal HTP width are analyzed. The results show that the DPP after constructal optimization reduces by 37.1% compared with that of the initial design point. The minimum DPP dramatically augments with the increases of HTP effective length, corrugation angle and mass flow rate of the warm seawater, and dramatically diminishes with the increases of corrugation wavelength and effective volume of the evaporator. The influence degree to optimal results varies for different design parameters and working fluids. The results can offer some valuable guidelines for the optimal designs and applications of the evaporators in OTECSs.

Suggested Citation

  • Wu, Zhixiang & Feng, Huijun & Chen, Lingen & Xie, Zhuojun & Cai, Cunguang, 2019. "Pumping power minimization of an evaporator in ocean thermal energy conversion system based on constructal theory," Energy, Elsevier, vol. 181(C), pages 974-984.
    • Handle: RePEc:eee:energy:v:181:y:2019:i:c:p:974-984
    DOI: 10.1016/j.energy.2019.05.216
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    References listed on IDEAS

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    Citations

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    Cited by:

    1. Huijun Feng & Lingen Chen & Wei Tang & Yanlin Ge, 2022. "Optimal Design of a Dual-Pressure Steam Turbine for Rankine Cycle Based on Constructal Theory," Energies, MDPI, vol. 15(13), pages 1-20, July.
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    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).
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