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Experimental research and CFD simulation on microchannel evaporator header to improve heat exchanger efficiency.

Author(s) : DONG Z. G., BEAN J. Jr

Summary

Microchannel evaporator performs superior heat transfer efficiency and capacity at compact size comparing with conventional tube-fin evaporator. The design of an appropriate coil header assembly is one of major tasks, which could affect the desired heat exchanger efficiency and capacity. An experimental investigation of three coil inlet header configurations, which are single, dual and distributor inlet headers, is conducted in the paper. A practical evaluation method, by means of measuring air temperature differential across coil to evaluate refrigerant distribution uniformity in coil header, is introduced. CFD models are also generated to simulate refrigerant liquid flow contours of these three inlet header configurations. Finalize the research, the distributor header configuration appears the most uniform distribution in conjunction with symmetrical flow distribution. The dual inlet header configuration also significantly improves distribution uniformness and symmetry comparing with the single inlet header configuration.

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Details

  • Original title: Experimental research and CFD simulation on microchannel evaporator header to improve heat exchanger efficiency.
  • Record ID : 2007-1483
  • 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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