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Open and closed-cycle mechanical vapour-compression heat-pump assisted sea-water purification systems

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  • Eisa, M. A. R.
  • Best, R.
  • Holland, F. A.

Abstract

The energy requirements for the distillation of impure water can be reduced by using either an open-cycle or a closed-cycle heat pump. The purification of typical sea-water, with a concentration of 3·4 weight %, is considered using an open-cycle mechanical vapour-compression (OMVC) heat pump and also a closed-cycle mechanical vapour-compression (CMVC) heat pump using an external working fluid. Plots are given showing the variation of the thermodynamic properties of sea-water with temperature and concentration. Plots are also given of the energy loads against temperature-lift for both the OMVC and CMVC systems. At temperatures up to 90°C, the work load on the compressor is less for the CMVC than for the OMVC system. The operating characteristics for a number of possible working-fluids for the CMVC system are also considered.

Suggested Citation

  • Eisa, M. A. R. & Best, R. & Holland, F. A., 1987. "Open and closed-cycle mechanical vapour-compression heat-pump assisted sea-water purification systems," Applied Energy, Elsevier, vol. 27(3), pages 203-228.
    • Handle: RePEc:eee:appene:v:27:y:1987:i:3:p:203-228
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    Cited by:

    1. Adamson, Keri-Marie & Walmsley, Timothy Gordon & Carson, James K. & Chen, Qun & Schlosser, Florian & Kong, Lana & Cleland, Donald John, 2022. "High-temperature and transcritical heat pump cycles and advancements: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).

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