R123水平强化单管外池沸腾换热实验研究  

Experimental Investigation on the Pool Boiling Heat Transfer Characteristics of R123 outside Single Horizontal Tubes

作　　者：刘文毅[1] 李妩[2] 陶文铨[2] 

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

出　　处：《制冷学报》2005年第4期30-34,共5页Journal of Refrigeration

摘　　要：对替代工质R123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.在沸腾温度分别为5℃、8℃和10℃时,光管外沸腾换热系数的实验数值较Cooper公式的预测值最大偏低10%;同时得到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以及强化管的强化效果,强化管的强化倍率在4.56～4.18之间.对R11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R123比R11沸腾换热系数要低8%左右.Experimental studies on the pool boiling heat transfer of the alternative, R123, outside smooth and fabricated tubes with numbers of holes were conducted At the saturation temperature of 5℃, 8℃ and 10℃, the experimental results agree with those from Cooper Equation with a maximum deviation of 10%. The variations of boiling heat transfer coefficients with both the heat flux and evaporation temperature were obtained. The experimental results show the enhancement ratios of fabricated tubes with numbers of holes is 4.56-4.18. The comparison with those of R11 were acquired. The boiling heat transfer coefficients outside the enhanced tube of R123 is lower than those of R11 about 8%.

关 键 词：工程热物理 强化传热 实验研究 池沸腾 替代工质 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TG76[动力工程及工程热物理—热能工程]