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Impact of the suction line accumulator on the frost/defrost performance of an air-source heat pump with a scroll compressor.

Author(s) : NUTTER D. W., O'NEAL D., PAYNE W. V.

Summary

The scroll compressor is being used in many US-manufactured heat pump systems. Because of their higher tolerance to liquid, many of the heat pump systems using scroll compressors do not use a suction line accumulator. The impact of removing the accumulator on the system performance of a residential heat pump was investigated. The unit used on orifice expansion device in the heating mode and a thermostatic expansion valve in the cooling (defrost) mode. Tests were run in psychrometric rooms at 1.7 deg C dry-bulb temperature and 80% relative humidity. Removal of the accumulator produced a 10% reduction in defrost cycle time for the heat pump. However, there was nearly a 2% reduction in the integrated cyclic COP for the system without a suction line accumulator.

Details

  • Original title: Impact of the suction line accumulator on the frost/defrost performance of an air-source heat pump with a scroll compressor.
  • Record ID : 1997-2427
  • Languages: English
  • Source: ASHRAE Transactions.
  • Publication date: 1996/02/16
  • Document available for consultation in the library of the IIR headquarters only.

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