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Study of a heat pump for simultaneous cooling and desalination using carbon dioxide.

Number: 1052

Author(s) : BYRNE P., DIABY A. T., MARE T.


Membrane distillation (MD) is a desalination technique that consumes a lot of energy compared to reverse osmosis or multiple effect distillation. Nevertheless, MD requires relatively low-temperature heat that can be recovered at the condenser of a cooling system. Experiments have shown that distilled water production increases with the feed water temperature. The transcritical CO2 cycle and its ability to produce hot water at a higher temperature at low expense is an asset for MD. A numerical model was built using EES software. A simulation study presents the expected performance of a CO2 heat pump for simultaneous cooling and desalination. In some operating conditions, the freshwater production is more than doubled compared to standard heat pumps. The specific energy consumption per cubic meter of distilled water is still higher than with reverse osmosis. However, energy and exergy analyses considering freshwater and cooling productions show promising research paths.

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Pages: 6p.


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  • Original title: Study of a heat pump for simultaneous cooling and desalination using carbon dioxide.
  • Record ID : 30027914
  • Languages: English
  • Subject: Technology
  • Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants(GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Publication date: 2020/12/07
  • DOI: http://dx.doi.org/10.18462/iir.gl.2020.1052
  • Available in the IIR library


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