A numerical study on the oil retention of R410A and PVE oil mixture in multi heat pump system

被引：2
|
作者：
Kim, Hak Soo [1 ]
Kim, Min Soo [1 ]
机构：
[1] Seoul Natl Univ, Dept Mech & Aerosp Engn, Seoul 151744, South Korea
来源：
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2016年 / 30卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
Flow pattern; Lubricant; Multi heat pump system; Oil retention; PVE oil; R410A; FRICTION CHARACTERISTICS; GENERAL CORRELATION; FLOW; EXCHANGERS; PIPE;
D O I：
10.1007/s12206-016-0348-6
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Predicting an amount of discharged oil from a compressor is necessary to charge the compressor with proper amount of oil. The amount of discharged oil can be predicted by calculating the oil retention amount in each component of a heat pump system. This study suggests a method for calculating the oil retention amount in a heat pump system. In addition, flow pattern of refrigerant and oil mixture in horizontal gas line of refrigerant was ascertained by flow visualization. The oil retention amounts in each component of multi heat pump system were calculated with respect to mass flux of refrigerant, Oil circulation ratio (OCR), length of horizontal and vertical lines. Oil retention amounts in horizontal and vertical gas lines of refrigerant were significant. To validate the model for gas lines of refrigerant, comparison between predicted and experimental oil retention amounts was conducted, and mean absolute percentage error was 15.0%.
引用
收藏
页码：1891 / 1901
页数：11
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