非共沸混合物微通道内流动沸腾特性  

Flow boiling in microchannel with nonazeotropic mixture

作　　者：马虎根[1] 胡自成[1] 

机构地区：[1]上海理工大学动力工程学院,上海200093

出　　处：《化工学报》2006年第3期526-529,共4页CIESC Journal

基　　金：上海市高等学校科学技术发展基金项目(01F09)

摘　　要：Experimental results are reported for the flow boiling heat transfer characteristics of nonazeotropic refrigerant mixture of R32 and R134a(25%/75%) in a microchannel with d=0.86 mm.The research results show that when the mass quality is greater than 0.1,the mass quality and mass flux have almost no effects on the heat transfer coefficients of flow boiling.Heat transfer coefficients of the flow boiling in the microchannel are dependent mainly on heat flux.Nucleation is dominant in the heat transfer process for most situations.The flow boiling heat transfer coefficients in microchannel are 30%—200% higher than those in normal tubes.Experimental correlation is presented with deviation of no more than 25%.Experimental results are reported for the flow boiling heat transfer characteristics of nonazeotropic refrigerant mixture of R32 and R134a （25%/75%） in a microchannel with d=0.86 mm. The research results show that when the mass quality is greater than 0.1, the mass quality and mass flux have almost no effects on the heat transfer coefficients of flow boiling. Heat transfer coefficients of the flow boiling in the microchannel are dependent mainly on heat flux. Nucleation is dominant in the heat transfer process for most situations. The flow boiling heat transfer coefficients in microchannel are 30%-200% higher than those in normal tubes. Experimental correlation is presented with deviation of no more than 25%.

关 键 词：微尺度通道 流动沸腾 混合工质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]