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Comparison of performance of a residential air-conditioning system using a microchannel and fin-and-tube heat exchanger.

Author(s) : YUN R., HWANG Y., RADERMACHER R., et al.

Summary

In this study the seasonal performance of a residential air conditioning system having either a fin-and-tube condenser or a microchannel condenser is experimentally investigated. Microchannel heat exchangers offer a higher volumetric heat exchange capacity and a reduced refrigerant charge amount. However, the operating characteristics and the seasonal energy efficiency ratio (SEER) of the residential air-conditioning system using a microchannel condenser have not been well known. For this investigation, a commercially available 7 kW capacity residential air-conditioning system having a fin-and-tube condenser served as the base system. After testing the base unit with the fin-and-tube condenser, the condenser was replaced by a microchannel heat exchanger with the same face area under identical test conditions. The test results show that the system with a microchannel heat exchanger has a reduced refrigerant charge amount of 10%, the COP increased by 6 to 10%, and the SEER increased by 7% as compared with those of the base system. Moreover, the condensing pressure of the system is decreased by 100 kPa and the pressure drop across the condenser is decreased by 84%. The microchannel heat exchanger enhances the SEER of the residential air-conditioning system by providing better heat transfers at reduced pressure drops.

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Details

  • Original title: Comparison of performance of a residential air-conditioning system using a microchannel and fin-and-tube heat exchanger.
  • Record ID : 2007-1704
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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