Abstract This article developed a novel numerical model for accurately predicting the thermal performance of fin-and-tube condenser, which coupled heat transfer between the air and refrigerant side. The heat exchange calculation between the air and refrigerant side was alternatively performed by coupling the tube wall temperatures. Meanwhile, the air side flow and heat transfer characteristics among the fin plates were achieved by porous media approach. Based on this model, the numerical studies were conducted for investigating the effects of air inlet temperature and frontal velocity on the thermal performance of such heat exchanger. Results showed that the predicted overall heat transfer rate was within the range of ±10% compared with the experimental data. It indicated that the porous media model was able to predict the thermal and flow characteristics of air side in a fin-and-tube condenser, and furthermore it could be used for the optimal design of such heat exchanger.

中文翻译：

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翅片管式冷凝器性能预测的耦合 CFD 方法

摘要 本文开发了一种新颖的数值模型，用于准确预测翅片管式冷凝器的热性能，其耦合了空气侧和制冷剂侧的传热。空气和制冷剂侧之间的热交换计算通过耦合管壁温度交替进行。同时，通过多孔介质方法实现了翅片板之间的空气侧流和传热特性。基于该模型，进行了数值研究，以研究空气入口温度和锋面速度对此类换热器热性能的影响。结果表明，与实验数据相比，预测的整体传热率在±10%的范围内。