Experimental Investigation on R245fa Throttling Devices under High Temperature

Conference Year

2018

Authors

Mingyue Huang, Refrigeration Institute, Gree Electric Appliances, Inc. of Zhuhai, Zhuhai City, Guangdong Province, P. R. ChinaFollow
Xiangfei Liang, Chinese National Engineering Research Center of Green Refrigeration Equipment, Zhuhai City, Guangdong Province, P. R. ChinaFollow
Yingwen Wu, "Refrigeration Institute, Gree Electric Appliances, Inc. of Zhuhai, Zhuhai City, Guangdong Province, P. R. China; National Engineering Research Center of Green Refrigeration Equipment, Zhuhai, China"
Bo Zheng, "Refrigeration Institute, Gree Electric Appliances, Inc. of Zhuhai, Zhuhai City, Guangdong Province, P. R. China; National Engineering Research Center of Green Refrigeration Equipment, Zhuhai, China"
Youlin Zhang, Refrigeration Institute, Gree Electric Appliances, Inc. of Zhuhai, Zhuhai City, Guangdong Province, P. R. ChinaFollow

Keywords

R245fa, Electronic Expansion Valve, Capillary Tube, Flow Rate Correlation

Abstract

The experiments on mass flow rate characteristics of R245fa refrigerant flowing through throttling devices including seven capillary tubes and the electronic expansion valve were carried out under the high-temperature working conditions. By combining data analysis with flow correlations, the design basis that is applicable to R245fa throttling devices can be obtained. By comparing the experimental mass flow rate with that predicted by Jung Correlation and Kim Correlation, it can be concluded that root mean square deviations of two correlations are 3.2 % and 3.3%, respectively. The root mean square deviation for electronic expansion valve is 4.5%. The conclusions offer high-accuracy design basis for throttling devices selection of high-temperature heat pump systems using R245fa as refrigerant.