Performance Study of a Novel Ejector-Cascade Refrigeration System with Regenerator

  • CHI Weikai ,
  • YANG Qichao ,
  • CHEN Xiaonan ,
  • LIU Guangbin ,
  • ZHAO Yuanyang ,
  • LI Liansheng
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  • College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China

Online published: 2024-09-08

Supported by

This work is supported by National Natural Science Foundation of China (No. 51976095) and the Taishan Scholar Program of Shandong (No. tsqn201812073).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Abstract

In this paper, a novel NH3/CO2 ejector-cascade refrigeration system with regenerator is proposed, which can recycle the waste heat at the outlet of the compressor. After establishing the mathematical model of the system, the theoretical energy and exergy analysis are carried out and compared with the conventional cascade refrigeration system. It is concluded that compared with the conventional cascade refrigeration system, the novel ejector-cascade refrigeration system with regenerator has the advantages of less power consumption of the compressor, less component exergy destruction, high system performance, and is more suitable for working at a lower temperature. Under the working conditions studied in this paper, compared with the conventional cascade refrigeration system, the COP of the novel ejector-cascade refrigeration system with regenerator is increased by 9.58%; the exergy efficiency is increased by 9.50%, and the optimal evaporation temperature is about –45°C.

Cite this article

CHI Weikai , YANG Qichao , CHEN Xiaonan , LIU Guangbin , ZHAO Yuanyang , LI Liansheng . Performance Study of a Novel Ejector-Cascade Refrigeration System with Regenerator[J]. Journal of Thermal Science, 2024 , 33(5) : 1618 -1629 . DOI: 10.1007/s11630-024-1963-7

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