R410A和R22在水平内螺纹管内冷凝性能的实验研究  

Experimental study on condensation heat transfer of horizontal internally ribbed tube with R22 and R410A

作　　者：魏义平[1] 陶乐仁[1] 密洁霞[1] 程建[1] 郑志皋[1] 赵庆霞[1] 高晓凯[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《低温与超导》2012年第12期46-49,共4页Cryogenics and Superconductivity

基　　金：国家高科技研究发展计划项目(2008AA05Z204)

摘　　要：实验研究了环保替代制冷工质R410A和R22在冷凝温度40℃时在内螺纹强化管(外径为9.52mm)内的冷凝换热特性,对二者的冷凝换热性能进行了对比,并研究了测试管外冷却水流量对换热系数的影响。结果表明:在管外冷却水流量相同时,R22的总换热系数K普遍比R410a小,而管内传热系数hr比R410A大。R22与R410A的总传热系数K均随管外冷却水流量的增加而增加,当制冷剂流量Gm大于300kg.s-1.m-2时,管外冷却水流量对总传热系数K的影响变小。The experiment studied condensing heat transfer characteristics of the environmental protection alternative refrige- ration R410A and R22 working in innergrooved copper tube（outer diameter is 9.52 mm） under the condensate temperature 40℃, compared condensing heat transfer characteristics of them, and studied the influence of the cooling water flow to the test tube＇ s heat exchange coefficient. The results show that when the cooling water flow is same, the total heat transfer coefficient K of refrigerant R22 is smaller than R410A universally, but tube heat transfer coefficient hr is bigger than R410A. The total heat transfer coefficient K of R22 and R410A increases with the increase of cooling water flow outside of the tube, when the refrigerant flow Gm is higher than 300kg. s-l. m-2, the affect to the total heat transfer coefficient K of the cooling water flow becomes smaller.

关 键 词：R410A 冷凝换热 内螺纹强化管 传热系数 冷却水流量 

分 类 号：TB64[一般工业技术—制冷工程]