制冷学报2024，Vol.45Issue(4)：51-58,8.DOI:10.3969/j.issn.0253-4339.2024.04.051
R134a及其替代工质R513A在微通道管中的流动沸腾实验研究
Experimental Investigation of R134a and Its Alternative Refrigerant R513A Flow Boiling in Microchannel Tube
摘要
Abstract
This study investigates the flow boiling characteristics of R134a and its alternative refrigerant R513A in a microchannel tube.The effects of vapor quality,saturation temperature,heat flux,and mass flux on the heat transfer coefficient and pressure gradients were explored.Additionally,a comparative analysis of R134a and R513A was conducted.The test conditions covered vapor quality from 0 to 1,inlet saturation temperature from 10℃ to 30 ℃,heat flux from 2 kW/m2 to 8 kW/m2,and mass flux from 100 kg/(m2·s)to 200 kg/(m2·s).Results show that saturation temperature has almost no effect on the heat transfer coefficient of R134a but slightly influences that of R513A.At high saturation temperatures,the pressure gradient of R513A is low.Heat flux significantly affects the heat transfer coefficients of both refrigerants,and the peak heat transfer coefficient increases by more than 30％.Moreover,under low vapor quality,the heat transfer coefficient increases by more than 80％;however,its effect on pressure gradients is negligible.Mass flux significantly affects the heat transfer coefficient under intermediate vapor quality,and doubling its value causes the heat transfer coefficient to increase by more than 50％.In addition,mass flux significantly affects the pressure gradient.A comparison of the flow boiling characteristics of R134a and R513A under the same test conditions shows that R513A has higher heat transfer coefficients and lower pressure gradients than R134a.关键词
低GWP制冷剂/流动沸腾/微通道管Key words
low GWP refrigerant/flow boiling/microchannel分类
通用工业技术引用本文复制引用
李厚培,李洪强..R134a及其替代工质R513A在微通道管中的流动沸腾实验研究[J].制冷学报,2024,45(4):51-58,8.基金项目
国家重点研发计划(2023YFC3806401)资助项目.(The pro-ject was supported by the National Key R&D Program of China(No.2023YFC3806401).) （2023YFC3806401）
