制冷剂侧结构对多元微通道平行流冷凝器传热与流动性能的影响

摘要/Abstract

摘要：

摘要：建立了多元微通道平行流冷凝器的稳态分布参数模型，将模型计算值与其实验结果对比验证了模型的正确性.同时，利用所建立的模型研究了扁管孔数、扁管内孔高宽比、流程布置、各流程间扁管数分配方式等参数对平行流冷凝器传热和流动性能的影响.结果表明：随着扁管孔数的增多，换热量逐渐增大，制冷剂侧压降逐渐减小，空气侧压降逐渐增大；随着扁管内孔高宽比的增大，换热量与制冷剂侧压降逐渐减小，空气侧压降不变；随着流程数的增多，换热量与制冷剂侧压降逐渐增大；当流程数一定时，各流程间扁管数的分配宜从第1流程向后依次递减，其递减速率逐渐减小，且过冷区的扁管数不宜过少.

关键词: , 多元微通道, 平行流冷凝器, 传热与流动性能, 变结构

Abstract:

The theoretical model of the multiple micro-channel parallel flow condenser was established based on the method of distribution parameters, and the validity of the model was verified by comparison with the experimental data. Based on this model, the effects of flat tube inner hole numbers, proportion of height and width of the inner hole, flow paths arrangement, flat tubes distribution of different flow path on the heat transfer and flow performance of multiple micro-channel parallel flow condenser were investigated. The results show that, as the flat tube inner hole numbers increase, the heat transfer rate and air-side pressure drop increase, while the refrigerant-side pressure drop decreases; when the proportion of the height and width of the inner hole increases, the heat transfer rate and refrigerant-side pressure drop decrease, and the air-side pressure drop remains constant; as the flow paths number increases, the heat transfer rate and refrigerant-side pressure drop increase; when the flow paths number remains constant, the principle of flat tubes distribution is that the tube number in every flow path should be decreased in turn, the decreasing speed should be gradually slowed down, and the tube numbers in the subcooling section should not be too few.

Key words: multiple micro-channel, parallel flow condenser, heat transfer and flow performance, variable structure

中图分类号:

TB 657.5

方继华1，谷波1，田镇1，赵鹏程2. 制冷剂侧结构对多元微通道平行流冷凝器传热与流动性能的影响[J]. 上海交通大学学报（自然版）, 2014, 48(09): 1315-1322.

FANG Jihua1，GU Bo1，TIAN Zhen1，ZHAO Pengcheng2. Effects of Refrigerant-Side Structure on Heat Transfer and Flow Performance of Multiple Micro-Channel Parallel Flow Condenser[J]. Journal of Shanghai Jiaotong University, 2014, 48(09): 1315-1322.

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