Numerical Model of a Microchannel Parallel Flow Evaporator with 
New Flow Boiling Heat Transfer Correlation

doi:10.16183/j.cnki.jsjtu.2017.09.004

Abstract

Abstract: In this paper, a numerical model with the recently proposed flow boiling heat transfer correlation was established for microchannel parallel flow evaporator. The numerical model was verified by comparing the experimental data with the open literature, where the refrigerant mass flow rate range was 34.6—245.6kg/h and evaporation pressure was 200—500kPa. The effects of four different flow boiling heat transfer correlations on the numerical model performance were investigated. Results showed that the correlation predicted 99% of experimental data in a ±30% error band. Moreover, the numerical model with the correlation yielded the mean absolute errors of 1.5%, 18.8%, 14.2% and 19.8% in prediction of cooling capacity, refrigerant superheat, air side and refrigerant side pressure drop, respectively. The presented numerical model can be used to evaluate and optimize the performance of microchannel parallel flow evaporator.

Key words: microchannel parallel flow evaporator; numerical model; new correlation; flow boiling heat transfer

CLC Number:

TB 61

MA Lei,GU Bo,TIAN Zhen,LI Ping. Numerical Model of a Microchannel Parallel Flow Evaporator with
New Flow Boiling Heat Transfer Correlation[J]. Journal of Shanghai Jiao Tong University, 2017, 51(9): 1043-1049.

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