商用空调用多元平行流冷凝器的实验研究

Experiment study of multiple parallel flow condenser in commercial air conditioner

针对商用空调应用环境,在换热器实验台进行多组平行流冷凝器性能实验,重点研究环境温度和流程分配对平行流冷凝器的流动和传热性能的影响,并与翅片管式换热器进行对比。实验结果表明：平行流冷凝器的换热量及制冷剂流动阻力均随蒸发温度上升而增大;平行流冷凝器的流程分配对制冷剂流动阻力影响显著;同等条件下平行流换热器的传热性能是翅片管式换热器的3~4倍。合理的流程分配可以提高平行流冷凝器的流动和传热性能,拓展其应用范围。

For commercial air conditioning applications,some performance experiments of parallel flow condenser in the heat exchanger experiment platform were carried out,what were focused on the flow and heat transfer performance of parallel flow condenser when environmental temperature and flow distribution change,and compared with finned tube heat exchanger. Results of experiments show that the parallel flow condenser＇s heat transfer and refrigerant flow resistance increase with evaporation temperature rise. Different flow distributions of parallel flow condensers have great influence on refrigerant flow resistance. The heat transfer performance of parallel flow heat exchanger is 3 ~ 4 times of finned tube heat exchanger in same conditions. Appropriate flow distribution can improve the flow and heat transfer performance of parallel flow condenser and augment its range of application.