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

网络出版日期: 2023-12-01

基金资助

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).

版权

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

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
Expand
  • 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

摘要

随着经济的快速发展,当今社会能源与环境之间的问题日益严重。在传统的喷射式制冷系统中,机械泵的存在不仅消耗电能,同时导致系统噪声大,成本高,效率低下。本文提出了以R1234yf为制冷剂的双热源喷射式制冷系统。该系统中,由特定热源驱动的气液喷射器替代液体循环泵,使得系统实现完全由热能驱动的同时利用不同温度等级的热源,系统运行更稳定,经济性更高。本文在能量,质量,动量守恒定律基础上对系统建立热力学模型,分析系统在不同工况下运行时对喷射器和系统性能的影响。同时利用正交优化试验,分析了不同工况因素对系统性能影响力的大小,得出系统冷凝温度对系统性能影响程度最大,气液喷射器一次流压力降对系统性能影响最小。同时该系统在某一特定工况下COP可以达到0.35。因此该系统因其可以利用不同温度热源制冷的特点可以在热量丰富电能匮乏的一些地区利用。

本文引用格式

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]. 热科学学报, 2022 , 31(5) : 1452 -1464 . DOI: 10.1007/s11630-020-1386-z

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.

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