Experimental analysis of R22 and R407c flow through electronic expansion valve
Experimental analysis of R22 and R407c flow through electronic expansion valve
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DOI：
10.1016/j.enconman.2005.05.005
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发表时间：
2006-03
影响因子：
10.4
通讯作者：
Chuan Zhang;Shanwei Ma;Jiangpin Chen;Zhi-jiu Chen
中科院分区：
文献类型：
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作者：
Chuan Zhang;Shanwei Ma;Jiangpin Chen;Zhi-jiu Chen
本研究的目的是目前的测试结果，并开发一个无因次相关的实验数据的基础上预测的质量流量的R22及其替代制冷剂R407 c通过电子膨胀阀（EEV）。在一系列的冷凝温度，蒸发温度和程度的过冷度在EEV入口处的EEV的五个开放设置程度的质量流量进行了测量。对实验结果进行了分析，发现运行工况、通流面积和制冷剂的热物理性质都会影响通过EEV的质量流量。基于白金汉π定理，提出了一种新的预测制冷剂通过EEV的质量流量的关联式。使用该相关性的预测值的相对偏差对于R22为-10.74%至9.26%，对于R407 c为-14.20%至22.10%。R22的平均偏差和标准偏差分别为-0.79%和5.02%，R407 c的平均偏差和标准偏差分别为0.67%和8.08%。根据EEV的工作条件和通流面积分析了相对偏差。该关联式可用于预测最大通流面积小于2.544mm ~ 2的EEV的质量流量。
The objective of this study is to present test results and to develop a dimensionless correlation on the basis of experimental data to predict the mass flow rate of R22 and its alternative refrigerant R407c through an electronic expansion valve (EEV). The mass flow rate was measured at a series of condensing temperatures, evaporating temperatures and degrees of subcooling at the EEV inlet with five opening setting degrees of the EEV. The experimental results were analyzed, and it was found that the operation condition, flow area and the thermophysical properties of the refrigerant would affect the mass flow rate through the EEV. A new correlation based on the Buckingham π theorem was developed to predict the mass flow rate of refrigerants through the EEV. The relative deviations of the predicted value by using this correlation are from −10.74% to 9.26% for R22 and from −14.20% to 22.10% for R407c. The average deviations and standard deviations are −0.79% and 5.02% for R22 and 0.67% and 8.08% for R407c, respectively. The relative deviation was analyzed in terms of the operation condition and flow area of the EEV. This correlation can be used to predict the mass flow rate through EEVs whose largest flow area is less than 2.544mm2.