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Improving the heating performance of a residential air conditioner by using a vapor-bypassed evaporator.

Number: pap. n. 492

Author(s) : FAN C., YAN G., YU J.

Summary

This paper presents an experimental investigation on the heating performance of a residential air conditioner with a vapor-bypassed evaporator. The vapor-bypassed evaporator, in which a phase separator is set in the middle of the refrigerant circuit to bypass vapor refrigerant, can reduce the refrigerant pressure drop and enhance the heat transfer coefficient at refrigerant side. The tested system contains two operation modes, i.e., vapor-bypassed (VB) mode and conventional heat pump (CH) mode. It is indicated that as the heating capacity ranges 1,800~4,800 W, the COP of VB mode is improved 3.2%~11% over CH mode under conventional heating condition. Under low-temperature heating condition (frosting condition), the system at VB mode yields 16.1% higher average integral heating capacity and 5% higher COP over CH mode at a fixed compressor frequency of 100 Hz. In conclusion, using the vapor-bypassed evaporator is a promising way for enhancing the heating performance of an air conditioner.

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Details

  • Original title: Improving the heating performance of a residential air conditioner by using a vapor-bypassed evaporator.
  • Record ID : 30026630
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0492

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