摘要
研究了环保替代制冷工质R410A-润滑油混合物在水平直光管内的流动沸腾摩擦压降特性,探索了油的平均质量分数、干度和质量流率对摩擦压降的影响.实验测试管为光管,长度为2m,外径为7.0 mm,内径为6.34 mm.实验结果表明,R410A-油混合物在光管内流动沸腾的摩擦压降随平均油浓度、干度和质量流率的增大而增大,当油的平均质量分数从0增长到5%时,压降最大可增加50%.开发了适用于R410A-油混合物光管内的流动沸腾摩擦压降关联式,新的关联式预测值与92%以上的实验数据偏差在±15%以内,平均误差为6.6%,最大误差为29.4%.
Experimental study of frictional pressure drop characteristics of R410A-oil mixture flow boiling inside a horizontal smooth tube was performed to investigate the influence of oil concentration, vapor quality and mass flux on the frictional pressure drop. The test tube is straight smooth tube, the length of the test tube is 2 m, and the outside and inside diameters are 7.0 mm and 6.34 mm, respectively. The test results show that the flow boiling frictional pressure drop of R410A-oil mixture increases with the increase of oil concentration, vapor quality and mass flux; the presence of oil enhances frictional pressure drop maximum by approximately 50% as the oil concentration increases from 0 to 5%. A new correlation of frictional pressure drop was developed for the R410A-oil mixture flow boiling inside smooth tube, and it maximum deviation are 6.6% and 29.4%, respectively.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2007年第3期370-375,共6页
Journal of Shanghai Jiaotong University
关键词
R410A
油
直光管
流动沸腾
压降
关联式
R410A
oil
straight smooth tube
flow boiling
pressure drop
correlation
