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中文摘要：
通过实验测试了饱和蒸汽温度分别为35℃和39℃时,制冷工质R22、R134a、R407C和R410A在花瓣翅片管管束外的冷凝传热性能,壁面过冷度从3℃至8℃。实验结果表明,各制冷工质在饱和蒸汽温度35℃时的管束平均冷凝传热性均优于39℃;且随着壁温差的增大,制冷工质R22、R134a和R410A的平均管束外冷凝传热系数逐渐减小,而R407C则反之;此外受管束效应的影响,相同壁温差下,制冷工质在试验管管外的冷凝传热系数随管排数的增加而降低。
英文摘要：
通过实验测试了饱和蒸汽温度分别为35℃和39℃时,制冷工质R22、R134a、R407C和R410A在花瓣翅片管管束外的冷凝传热性能,壁面过冷度从3℃至8℃。实验结果表明,各制冷工质在饱和蒸汽温度35℃时的管束平均冷凝传热性均优于39℃;且随着壁温差的增大,制冷工质R22、R134a和R410A的平均管束外冷凝传热系数逐渐减小,而R407C则反之;此外受管束效应的影响,相同壁温差下,制冷工质在试验管管外的冷凝传热系数随管排数的增加而降低。
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