Performance comparison among two-phase, liquid, and vapor injection heat pumps with a scroll compressor using R410A

被引：59
|
作者：
Kim, Dongwoo [1 ]
Jeon, Yongseok [1 ]
Jang, Dong Soo [1 ]
Kim, Yongchan [1 ]
机构：
[1] Korea Univ, Dept Mech Engn, Seoul 136713, South Korea
来源：
APPLIED THERMAL ENGINEERING | 2018年 / 137卷
关键词：
Two-phase injection; Vapor injection; Liquid injection; Heat pump; Scroll compressor; REFRIGERANT INJECTION; ELECTRIC VEHICLES; SYSTEMS; OPTIMIZATION; COLD; R32; TEMPERATURE; GEOMETRIES;
D O I：
10.1016/j.applthermaleng.2018.03.086
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Although two-phase injection technique is expected to improve the performance and reliability of heat pumps in cold climate conditions, its application is limited due to wet-compression. In this study, a numerical model was developed and validated to predict the performance of liquid, vapor, and two-phase injection heat pumps. The performance characteristics of the liquid, vapor, and two-phase injection heat pumps with a scroll compressor using R410A were compared with the others, based on the predicted data. The optimum injection quality in the two-phase injection heat pump to achieve maximum COP was analyzed as a function of the injection pressure, compressor frequency, and outdoor temperature. The two-phase injection heat pump with the optimum injection quality exhibited the highest COP among all injection types with a proper discharge temperature. In addition, the two-phase injection heat pump with the optimum injection quality was more effective in COP improvement with decreasing outdoor temperature.
引用
收藏
页码：193 / 202
页数：10
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