R134a卧式螺旋管内流动沸腾换热特性实验研究  

Experimental Investigation on Flow Boiling Heat Transfer of R134a in Helically-coiled Tube

作　　者：邵莉[1] 韩吉田[1] 陈常念[1] 陈文文[1] 潘继红[1] 

机构地区：[1]山东大学能源与动力工程学院,济南250061

出　　处：《制冷学报》2009年第6期11-14,共4页Journal of Refrigeration

基　　金：国家自然科学基金资助项目(50776055)~~

摘　　要：对R134a在水平直管和螺旋管内的沸腾换热特性进行了实验研究。在三个不同的蒸发温度（5℃、10℃和20℃），工质R134a的质量流量范围为100－400kg／（m^2．s）和干度范围为0．1－0．8的条件下，实验得到了R134a在水平直管和螺旋管内的沸腾换热系数随其质量流量和干度的变化关系，将水平直管和螺旋管内的沸腾换热特性数据进行了比较，结果显示，在实验条件下，卧式螺旋管的传热系数比直管的平均增加13．7％。Abstract An experiment was conducted to investigate the flow boiling heat transfer of R134a in a horizontal straight tube and a helically-coiled tube at three saturation temperatures （5℃, 10℃ and 20℃） with the refrigerant mass flux of 100-400 kg/（m^2.s）, the heat flux of 5-20 kW/m^2, and the vapor quality of 0.1-0.8. The influence of vapor quality, heat flux, saturation temperature, and mass flux of R134a on the boiling heat transfer coefficient in the horizontal straight tube and the helically-coiled tube was obtained. The comparison between our experimental results and the data available in literature shows that the boiling heat transfer coefficients of R134a in the helically-coiled tube were 13.7% greater in average than those in the horizontal straight tube under the experimental conditions.

关 键 词：工程热物理 流动沸腾 螺旋管 制冷剂R134a 

分 类 号：TB657.5[一般工业技术—制冷工程] TK172[动力工程及工程热物理—热能工程]