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Thermal optimization research of vertical tube climbing film desalination system

Author

Listed:
  • Yong Yang
  • Xiaotong Ren
  • Yiqiao Li
  • Dayuan Yuan
  • Yali Guo
  • Kun Zhang
  • Shengqiang Shen

Abstract

Based on the pinch theory and energy cascade utilization principle, the performance of a multi-effect shipboard vertical tube climbing film desalination system combined thermal vapor compression with different preheating configuration has been analyzed. The mathematical model is established for thermodynamic simulation, in which various thermodynamic losses caused by boiling point elevation and pressure drop are considered, and the effective heat transfer temperature difference and the hot side temperature difference are used to analyze the influences of heating steam temperature, final effect evaporation temperature, and concentration ratio on thermal performance including gained output ratio (GOR)—specific heat transfer area for different preheating configuration. The results show that the internal average effective heat transfer temperature difference determines characteristics of multi-effect distillation (MED) system. While for system with similar average effective heat transfer temperature, the temperature difference of hot side is the controlling parameter. And the energy cascade utilization principle shows the controlling attribute in MED thermodynamic system, as GOR is improved mainly due to utilization of the secondary energy and residual energy of the heating steam for preheating process.

Suggested Citation

  • Yong Yang & Xiaotong Ren & Yiqiao Li & Dayuan Yuan & Yali Guo & Kun Zhang & Shengqiang Shen, 2023. "Thermal optimization research of vertical tube climbing film desalination system," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 18, pages 473-481.
    • Handle: RePEc:oup:ijlctc:v:18:y:2023:i::p:473-481.
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctad029
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