R32/R134a在水平内螺纹管内流动沸腾强化特性的分析与研究  

Convective heat transfer of R32/R134a inside horizontal microfin tubes

作　　者：吴志光[1] 马虎根[2] 蔡祖恢[2] 

机构地区：[1]天津大学热能研究所,天津300072 [2]上海理工大学动力工程学院,上海200093

出　　处：《化工学报》2005年第2期239-242,共4页CIESC Journal

摘　　要：Experimental study was reported for flow boiling heat t ransfer of a nonazeotropic mixture of R32/R134a[25%(mass)/75%(mass)]inside bot h smooth and microfin tubes with internal spiral grooves.The influences of mass quality,heat flux & mass flow rate on A f (heat transfer enhanced coef ficient)are discussed, respectively.The experimental results show that the micro fin tubes have distinct performance advantages over the smooth tube at similar c onditions,the varying of heat flux has the greatest effect on A f,and A f varied from 1.4—2.2.Experimental study was reported for flow boiling heat transfer of a nonazeotropic mixture of R32/R134a [25%(mass)/75%(mass)] inside both smooth and microfin tubes with internal spiral grooves. The influences of mass quality, heat flux and mass flow rate on Af (heat transfer enhanced coefficient) are discussed, respectively. The experimental results show that the microfin tubes have distinct performance advantages over the smooth tube at similar conditions, the varying of heat flux has the greatest effect on Af, and Af varied from 1.4-2.2.

关 键 词：内螺纹强化管 强迫流动沸腾换热 非共沸混合制冷剂 

分 类 号：TK124[动力工程及工程热物理—工程热物理]