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Experimental and economic analysis with a novel ejector-based detection system for thermodynamic measurement of compressors

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  • Li, Xiaoqiong
  • Wang, Xiaoyan
  • Zhang, Yufeng
  • Fang, Lei
  • Deng, Na
  • Zhang, Yan
  • Jin, Zhendong
  • Yu, Xiaohui
  • Yao, Sheng

Abstract

The research of the high-temperature heat pump compressors above 100 °C has brought great challenges by its detection system, and in this study, a novel ejector-based detection system has been proposed to measure the thermodynamic performance of the heat pump compressors. The paper began with a numerical method to design the nozzle and diffuser of the ejector. Compared with the results of gas dynamics calculation, the deviations of nozzle and the diffuser were lower than 10.38% and 3.38%, respectively. Furthermore, the compressor performance was analyzed at the suction temperature in the range of 90–110 °C while the speed in the range of 2820–3060 r/min. The results showed that the compression ratio varied from 2.3 to 2.7, and the volumetric efficiency as well as isentropic efficiency was 90% and 70%, respectively. Assuming that the compressor was used in a heat pump system at the same operating condition, it was noteworthy that the highest discharge temperature was 184.8 °C and the coefficient of performance was more than 3.9. In an actual case, the initial investment cost of the ejector-based detection system is 3311 $, while that of the heat pump detection system is 59,795 $, the economical saving can reach to 94.5%. This is due to the exchanger has been omitted in ejector-based detection system compared with the traditional heat pump detection system. All in all, the novel system was reliable and economical.

Suggested Citation

  • Li, Xiaoqiong & Wang, Xiaoyan & Zhang, Yufeng & Fang, Lei & Deng, Na & Zhang, Yan & Jin, Zhendong & Yu, Xiaohui & Yao, Sheng, 2020. "Experimental and economic analysis with a novel ejector-based detection system for thermodynamic measurement of compressors," Applied Energy, Elsevier, vol. 261(C).
    • Handle: RePEc:eee:appene:v:261:y:2020:i:c:s0306261919320823
    DOI: 10.1016/j.apenergy.2019.114395
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    References listed on IDEAS

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    Cited by:

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    2. Wu, Zhangxiang & Wang, Xiaoyan & Sha, Li & Li, Xiaoqiong & Yang, Xiaochen & Ma, Xuelian & Zhang, Yufeng, 2021. "Performance analysis and multi-objective optimization of the high-temperature cascade heat pump system," Energy, Elsevier, vol. 223(C).

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