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Experimental study on performance of economized vapor injection heat pump system using refrigerant R32.

Number: pap. n. 632

Author(s) : ZHANG X. Y., GUO X. M., ZHANG S. L.

Summary

The refrigerant R32 is considered as a potential alternative refrigerant of R410A because of its low GWP and the basic thermodynamic parameters. It can effectively improve the heating efficiency and reduce the discharge temperature of the compressor to use the economized vapor injection (EVI) refrigeration system. In this paper, the performance of the EVI heat pump system using refrigerant R32 is investigated experimentally under the conditions of the evaporating temperature ranged from -2°C to -15°C. The experimental results indicate that the injection ratio, heat capacity and power consumption of the EVI heat pump system increase with the injection pressure. The max injection ratio of the EVI heat pump system is about 33% under the evaporating temperature of -15°C. For the EVI heat pump system, the system COP achieves the maximum value as the evaporating temperature is about -6°C, and the optimum injection pressure ranges from 1.50MPa to 1.54MPa. The discharge temperature of the EVI heat pump system drops by 11°C under the evaporating temperature of -15°C. As the evaporating temperature is below -6°C, the COP of the EVI heat pump system is higher than that of the traditional single stage heat pump.

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Pages: 6 p.

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Details

  • Original title: Experimental study on performance of economized vapor injection heat pump system using refrigerant R32.
  • Record ID : 30015615
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0632

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