替代工质HCFC123管外沸腾换热实验研究  

Experimental research on boiling heat transfer performance of alternative medium HCFC123 outside tube

作　　者：刘文毅[1] 李妩[2] 陶文铨[2] 

机构地区：[1]华北电力大学能源与动力工程学院,北京102206 [2]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《华北电力大学学报（自然科学版）》2005年第4期40-43,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：对替代工质HCFC123在光管、机加工多孔表面强化管水平单管外池沸腾换热进行了实验研究,实验沸腾饱和温度分别为5℃、8℃和10℃。得出了强化管外沸腾换热系数随热流密度、沸腾压力的变化规律并整理成实验关联式,通过实验可得出强化管的强化换热效果良好,强化倍率在4.56～4.18之间。对CFC11也进行了同样实验,并把二者沸腾换热特性进行比较,强化管外HCFC123比CFC11沸腾换热系数要低8%左右。Experimental studies on the pool boiling heat transfer of the new alternative medium, HCFC 123, outside smooth and fabricated tubes with holes are conducted at 5 ℃, 8 ℃ and 10 ℃. The variations of heat transfer coefficients with the heat flux and evaporation temperature are obtained. The experimental results show that the enhancement ratio of enhanced tube is 4.56-4.18. These results are compared with those of CFC11. The boiling heat transfer coefficient outside enhanced tube of HCFC123 is about 8% lower than that of CFC11.

关 键 词：替代工质 核态池沸腾 换热强化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]