PERFORMANCE ANALYSIS OF VAPOR-INJECTION HEAT PUMP BASED ON PVT COLLECTOR/EVAPORATOR

Yao Jian; Zheng Sihang; Peng Hao; Zhao Yao; Dai Yanjun; Shou Chunhui

doi:10.19912/j.0254-0096.tynxb.2020-1010

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (6) : 138-144. DOI: 10.19912/j.0254-0096.tynxb.2020-1010

PERFORMANCE ANALYSIS OF VAPOR-INJECTION HEAT PUMP BASED ON PVT COLLECTOR/EVAPORATOR

Shou Chunhui^1,2, Yao Jian³, Zheng Sihang³, Peng Hao^1,2, Zhao Yao³, Dai Yanjun³

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Abstract

Traditional direct expansion solar-assisted heat pump system has poor adaptability in low temperature environment, which affects its use in cold areas. By adopting vapor-injection（VI） technology, it can effectively improve its heating capacity under low temperature conditions. Taking the proposed vapor-injection heat pump system using PVT collector/evaporator as the research object, the effects of environmental conditions, solar irradiance and injected steam mass flow rate on the performance of the heat pump system are simulated and verified by means of model establishment, numerical simulation and experimental research. The simulation results show that the system COP could reach 4.3 which is 63.6% higher than that of the ASHP system with VI cycle when the ambient temperature is -10℃ and the solar radiation intensity is 500 W/m². Compared with other three heating systems with Levelized Cost of Heat （LCOH） as an indicator, the proposed system economy also has certain advantages, which provides the possibility for the application of steam jet heat pump system in cold area.

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vapor injection / PVT / direct expansion / solar assisted heat pump

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Shou Chunhui, Yao Jian, Zheng Sihang, Peng Hao, Zhao Yao, Dai Yanjun. PERFORMANCE ANALYSIS OF VAPOR-INJECTION HEAT PUMP BASED ON PVT COLLECTOR/EVAPORATOR[J]. Acta Energiae Solaris Sinica. 2022, 43(6): 138-144 https://doi.org/10.19912/j.0254-0096.tynxb.2020-1010

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