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

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  • Kim, Man-Hoe
  • Bullard, Clark W

Abstract

This paper presents the development and verification of a heat exchanger model for evaluating the thermal performance of an evaporator for a CO2 mobile air-conditioning system. The model has been developed, on the basis of the finite volume method, with emphasis placed on the air-side heat and mass transfer processes. The governing equations are derived from mass and energy balances using the newly developed air-side heat transfer and friction loss correlations for microchannel heat exchangers under both dry and wet conditions. The calculated air-side heat transfer and pressure drop data are in good agreement with measured data. However, the refrigerant-side pressure drop estimation for microchannel tubes usually underestimates the measured value. The simulation results and importance of selecting appropriate heat transfer and pressure drop correlations for the microchannel heat exchanger are addressed.

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  • Kim, Man-Hoe & Bullard, Clark W, 2001. "Development of a microchannel evaporator model for a CO2 air-conditioning system," Energy, Elsevier, vol. 26(10), pages 931-948.
    • Handle: RePEc:eee:energy:v:26:y:2001:i:10:p:931-948
    DOI: 10.1016/S0360-5442(01)00042-1
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    Cited by:

    1. Austin, Brian T. & Sumathy, K., 2011. "Transcritical carbon dioxide heat pump systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(8), pages 4013-4029.
    2. Lin Chen & Yizhi Zhang & Karim Ragui & Chaofeng Hou & Jinguang Zang & Yanping Huang, 2023. "Molecular Dynamics Method for Supercritical CO 2 Heat Transfer: A Review," Energies, MDPI, vol. 16(6), pages 1-28, March.
    3. Wenju Hu & Xin Zhang, 2022. "Study on the Coupling Effect of Heat Transfer and Refrigerant Distribution in the Flat Tube of a Microchannel Evaporator," Energies, MDPI, vol. 15(14), pages 1-22, July.
    4. Zilio, Claudio & Brown, J. Steven & Schiochet, Giovanni & Cavallini, Alberto, 2011. "The refrigerant R1234yf in air conditioning systems," Energy, Elsevier, vol. 36(10), pages 6110-6120.
    5. Shao, Liang-Liang & Yang, Liang & Zhang, Chun-Lu, 2010. "Comparison of heat pump performance using fin-and-tube and microchannel heat exchangers under frost conditions," Applied Energy, Elsevier, vol. 87(4), pages 1187-1197, April.
    6. Li, Gang & Eisele, Magnus & Lee, Hoseong & Hwang, Yunho & Radermacher, Reinhard, 2014. "Experimental investigation of energy and exergy performance of secondary loop automotive air-conditioning systems using low-GWP (global warming potential) refrigerants," Energy, Elsevier, vol. 68(C), pages 819-831.

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