Theoretical investigation on working fluids of two-stage vapor-compression high-temperature heat pump

被引：0
|
作者：
Zhang, Sheng-Jun [1 ]
Wang, Huai-Xin [1 ]
Guo, Tao [1 ]
机构：
[1] Dept. of Thermal Energy and Refrig. Eng., Tianjin University, Tianjin 300072, China
来源：
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2010年 / 31卷 / 10期
关键词：
Condensing temperature - Discharge temperature - High temperature heat pump - Theoretical cycle performance - Theoretical investigations - Two stage compression - Vapor compression - Vapor compression cycle;
D O I：
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学科分类号：
摘要：
A screening of working fluids for five circulation modes of two-stage vapor-compression high-temperature heat pumps was conducted theoretically at the condensing temperature of 100~130°C with temperature lifts of 45°C. Theoretical cycle performance of R245fa in the five modes was compared. The result shows that R245fa, E143 and R123 exhibit better performance in the two-stage compression heat pump with superheated gas at the inlet of second stage of compressor. And E245cb, R245ca, E245fa and R245fa present good cycle performance comprehensively in the two-stage compression heat pump without superheated gas at the inlet of second stage of compressor. The COPh is greatly increased and the discharge temperature is reduced obviously compared with single vapor-compression cycle. The condensing temperature and the performance of the heat pump can be enhanced by the application of two-stage vapor-compression cycle.
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页码：1635 / 1638
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