陶雪豹,黄理浩,陶乐仁,刘德,张苏韩

• 1:上海理工大学能源与动力工程学院
• 2:上海市动力工程多相流动与传热重点实验室

摘要(Abstract)：

R513A是第4代新型环保制冷剂，在制冷空调等方面有着广阔的应用前景。为研究R513A在水平管内的冷凝换热特性，搭建一套冷凝/蒸发一体式水平单管换热实验台。实验工况：冷凝温度分别为33、35、38、40℃,质量流速为50—225 kg/(m~2·s)。研究变质量流速、变冷凝温度等对管内冷凝换热特性和流动压降的影响，并与工质R32和R134a对比。研究结果表明：R513A冷凝换热系数和压降均随质量流速的增加而增加，随冷凝温度的增大而减小；R32冷凝换热性能要优于R513A与R134a,而R134a的冷凝换热系数比R513A高19.7%,但其压降要比R513A高49.2%,综合考虑，R513A可用于R134a的替代。最后，将实验值与关联式预测值进行对比，显示Dobson和Chato、Cavallini等关联式的换热系数预测效果较好，其平均绝对误差为13.2%和13.62%。

关键词(KeyWords)： 冷凝换热;压降;R513A;换热关联式

Abstract:

Keywords:

基金项目(Foundation): 上海市动力工程多相流动与传热重点实验室研究项目(2019KJFZ201);; 大学生创新创业训练计划项目

作者(Author): 陶雪豹,黄理浩,陶乐仁,刘德,张苏韩

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