提出了一种基于新流动沸腾传热关联式的微通道平行流蒸发器数值模型，并与文献中的实验数据进行对比，以验证微通道平行流蒸发器数值模型的正确性.其中，在制冷剂流量为34.6~245.6kg/h，蒸发压力为200~500kPa的条件下，分析了4种流动沸腾传热关联式对所提出的数值模型的影响.结果表明，在所采用的99%的实验数据下，新流动沸腾传热关联式的预测误差在±30%范围内.与此同时，采用所提出的微通道平行流蒸发器数值模型预测微通道平行流蒸发器的制冷量、制冷剂过热度、空气侧和制冷剂侧压降所产生的平均绝对误差分别为1.5%、18.8%、14.2%和19.8%.
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.
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