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Preliminary study on CO2 transcritical ejector enhanced compressor refrigeration system for independent space cooling and dehumidification.

Author(s) : ZHEQUAN J., HAFNER A., EIKEVIK T. M., et al.

Type of article: Article, IJR article

Summary

This study presents a single CO2 vapour-compression system for independent cooling and dehumidification of indoor air conditioning systems. A CO2 gas cooler outlet split (GOS) ejector system is introduced to generate two levels of evaporating temperature, and therefore indoor air temperature and humidity can be controlled independently. The two-phase ejector improves energy efficiency of the CO2 transcritical system by recovering expansion work loss. The steady state analysis shows that the COP of the CO2 ejector system is 12–60% better than that of standard isenthalpic expansion one when the humidity load ratio covers 10–50% of the total thermal load. Moreover, transient performances of the CO2 GOS ejector system under different indoor load conditions are simulated. It proves that the hybrid GOS GCHPing system offers a solution to the future air conditioning sector to use the environmentally friendly CO2 as long term working fluid.

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Pages: 13-20

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Details

  • Original title: Preliminary study on CO2 transcritical ejector enhanced compressor refrigeration system for independent space cooling and dehumidification.
  • Record ID : 30025593
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 100
  • Publication date: 2019/04
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2019.01.027

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