摘要
The purpose of this research is to reveal the exergy variation of each component in a direct-expansion solar-assisted heat pump(DX-SAHP)system.Exergy analysis of the DX-SAHP system with R134a is conducted.and the performance evaluation is done.The proposed system is mainly composed of a bare plate solar collec-tor/evaporator,a hermetic variable-frequency rotary-type compressor,a micro-channel condenser and an electronic expansion valve.The experimental data include the exergy loss rates.irreversibility rates and exergy loss ratios of all components and the infuences of ambient temperature on these parameters.The analysis results show that the average irreversibility rate of the compressor is 204.8 W at an ambient temperature of 16℃,and 149.9 W atan ambient temperature of 27℃.The highest irreversibility rate occurs in the compression process,followed by the throttling process.the evaporation process and the condensation process.
作者
孔祥强
崔福林
李见波
张茂远
KONG Xianggiang;CUI Fulin;LI Jianbo;ZHANG Maoyuan(College of Mechanical and Electronic Engineering.Shandong University of Science and Technology,Oinedao 266590,Shandong,China)
基金
the National Natural Science Foundation of China(No.51776115)
the Shandong Province Graduate Student Supervisor Guidance Ability Promotion Program(No.SDYY17037)
the Shandong University of Science and Technology Graduate Student Supervisor Guidance Ability Promotion Program(No.KDYC17009)。
