J Shanghai Jiaotong Univ Sci

J Shanghai Jiaotong Univ Sci ›› 2021, Vol. 26 ›› Issue (2): 138-145.doi: 10.1007/s12204-020-2228-6

• Energy Engineering, Mechanics & Materials • Previous Articles     Next Articles

Exergy Analysis of Direct-Expansion Solar-Assisted Heat Pump Based on Experimental Data

Exergy Analysis of Direct-Expansion Solar-Assisted Heat Pump Based on Experimental Data

KONG Xiangqiang (孔祥强), CUI Fulin (崔福林), LI Jianbo (李见波), ZHANG Maoyuan (张茂远)   

  1. (College of Mechanical and Electronic Engineering, Shandong University of Science and Technology,
    Qingdao 266590, Shandong, China)
  2. (College of Mechanical and Electronic Engineering, Shandong University of Science and Technology,
    Qingdao 266590, Shandong, China)
  • Online:2021-04-28 Published:2021-03-24
  • Contact: KONG Xiangqiang (孔祥强) E-mail:xqkong@sdust.edu.cn
  • About author:

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Abstract: 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 collector/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 influences 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 °C, and 149.9 W at an ambient temperature of 27 °C. The highest irreversibility rate occurs in the compression process, followed by the throttling process, the evaporation process and the condensation process.


Key words: exergy analysis| heat pump, solar energy| direct expansion

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 collector/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 influences 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 °C, and 149.9 W at an ambient temperature of 27 °C. The highest irreversibility rate occurs in the compression process, followed by the throttling process, the evaporation process and the condensation process.


关键词: exergy analysis| heat pump, solar energy| direct expansion

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