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An experimental study on the performance evaluation of prototype microchannel evaporators for residential air-conditioning applications.

Author(s) : CHO H., CHO K., YOUN B., et al.

Summary

The study was aimed at evaluating the performance of prototype microchannel evaporators for the residential air-conditioning application using R-22 refrigerant under wet condition. Eight prototype evaporators were manufactured and tested using psychrometric calorimeter test facilities. Each evaporator consisted of 2 or 3 parallel flow heat exchangers connected with return pipes. The parallel flow heat exchanger had 1 parallel microchannel tubes that brazed into the inlet and outlet headers. The tube had 8 rectangular ports with the hydraulic diameter of 1.3 mm. The louvered fin had louver angle of 27°, louver pitch of 1.4 mm and flow depth of 18.8 mm. The flow area ratio had a great effect on the cooling capacity of the microchannel evaporator under the test conditions. Flow distribution characteristics were slightly affected by the pressure drop resulting from the configuration of the refrigerant flow at the exit of the evaporator. The refrigerant mass flow rate showed the opposite trends to the refrigerant-side pressure drop.

Details

  • Original title: An experimental study on the performance evaluation of prototype microchannel evaporators for residential air-conditioning applications.
  • Record ID : 2007-0807
  • Languages: English
  • Source: ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
  • Publication date: 2006/05/21

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