Investigation on the Performance of the Pump-Free Double Heat Source Ejector Refrigeration System with R1234yf

  • YU Meihong ,
  • ZHAO Hongxia ,
  • WANG Xinli ,
  • HAN Jitian ,
  • LAI Yanhua
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  • 1. School of Energy and Power Engineering, Shandong University, Ji’nan 250061, China
    2. School of Control Science and Engineering, Shandong University, Ji’nan 250061, China

Online published: 2023-12-01

Supported by

This work is supported by the National Natural Science Foundation of China (Grant No. 51776110) and the Fundamental Research Funds of Shandong University (Grant No. 2017JC037).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Abstract

A pump is needed in an ejector refrigeration system, which makes the system high cost and complicated and hinders its application. A pump-free double heat source ejector refrigeration system using R1234yf as working fluid is proposed in which an injector driven by another heat source replaces the liquid circulating pump, making the system more affordable, simpler and more stable. The effect of different operation conditions on entrainment ratios and the influence of different factors on system performance are analyzed on the basis of mass, momentum and energy conservation equations. The influence degree of each factor on system performance is investigated by the orthogonal test method. The condenser temperature has the largest effect on system performance. The pressure drop in the suction chamber of gas-liquid injector has the least impact on system performance. The COP can reach about 0.35 under a certain working condition. The system can be driven by two different temperature heat sources with no electricity needed, and it is a good choice for places with abundant heat resources or lack of electricity.

Cite this article

YU Meihong , ZHAO Hongxia , WANG Xinli , HAN Jitian , LAI Yanhua . Investigation on the Performance of the Pump-Free Double Heat Source Ejector Refrigeration System with R1234yf[J]. Journal of Thermal Science, 2022 , 31(5) : 1452 -1464 . DOI: 10.1007/s11630-020-1386-z

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