摘要
针对制冷剂R1233zd(E)和R123,在饱和温度36. 1℃,冷凝水流速2. 12 m/s,2. 59 m/s和2. 90 m/s工况下,分别对水平光管和强化冷凝管GDHT-GDⅢ的管外冷凝换热系数进行测试。结果表明:R1233zd(E)的光管管外冷凝换热系数高于R123的6%～16%,R1233zd(E)的强化冷凝管GDHT-GDⅢ管外冷凝换热系数高于R123的19%～21%;采用强化冷凝管GDHT-GDⅢ时R1233zd(E)的管外冷凝换热系数是采用光管时的10. 8倍。指出R1233zd(E)可作为R123的替代物,强化冷凝管GDHT-GDⅢ能够很好地发挥R1233zd(E)的换热性能。
The condensation heat transfer coefficients outside horizontal tubes for R1233 zd (E)and R123 are tested on the horizontal smooth tube and GDHT-GDⅢ enhanced condenser tube respectively,under the saturation temperature of 36. 1 ℃,and the condensing-water flow rates of 2. 12 m/s,2. 59 m/s,and 2. 90 m/s. The results show that for smooth tube,the condensation heat transfer coefficient outside tube for R1233 zd (E) is higher than that for R123 by 6%-16%; for GDHTGDⅢ enhanced condenser tube,the condensation heat transfer coefficient outside tube for R1233 zd (E) is higher than that for R123 by 19%-21%; for R1233 zd (E),the condensation heat transfer coefficient outside GDHT-GDⅢ enhanced condenser tube is 10. 8 times of that outside smooth tube. R1233 zd (E) is a good substitute for R123,and the GDHT-GDⅢ enhanced condenser tube can give a good play to the heat transfer performance of R1233 zd (E).
作者
武永强
陈泰连
Wu Yongqiang;Chen Tailian(Golden Dragon Precise Copper Tube Group Inc.;Gonzaga University)
出处
《制冷与空调》
2019年第4期35-38,55,共5页
Refrigeration and Air-Conditioning
