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Development and validation of a microchannel evaporator model for a CO2 air-conditioning system.

Author(s) : JIN J., CHEN J. P., CHEN Z.

Summary

This paper presents an analysis/computer model to predict the performance of an evaporator for a CO2 mobile air-conditioning system. Based on the finite volume method, the model has been developed by using mass and energy conservation equations, with emphasis placed on the refrigerant-side heat transfer and pressure drop characteristics. The in-tube refrigerant flow was divided into two-phase region and superheated region, and both dry and wet conditions were considered. Using the newly developed refrigerant-side heat transfer and pressure drop correlations, the model can predict the performance of evaporator with a reasonable accuracy compared with the experimental data. The errors for cooling capacities and refrigerant-side pressure drops were plus or minus 1.9 and 12.3%, respectively. Furthermore, the effects of selecting different refrigerant-side heat transfer and pressure drop model on the performance of evaporator are discussed.

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Pages: ICR07-E1-1057

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Details

  • Original title: Development and validation of a microchannel evaporator model for a CO2 air-conditioning system.
  • Record ID : 2007-2281
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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