Effect of thermodynamic parameters on the performance of refrigerator-ejector

doi:10.1007/s11708-010-0004-2

Front Energ Power Eng Chin

2010, Vol. 4

Issue (4) : 517-521 https://doi.org/10.1007/s11708-010-0004-2

RESEARCH ARTICLE

Effect of thermodynamic parameters on the performance of refrigerator-ejector

Lihong CAO, Yicai LIU(

), Chao WAN, Tianlong XIN, Qian HUANG, Mingyan ZHANG

School of Energy Science and Engineering, Central South University, Changsha 410083, China

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Abstract

A 3D calculation model of a refrigerator-ejector was built and simulated in a compression/injection hybrid refrigeration cycle system by using the FLUENT software of CFD. The effect of thermodynamic parameters (the pressure of primary fluid and secondary fluid) on the performance of the refrigerator-ejector was studied. The boundary conditions were set according to the actual operating condition and the parameters of refrigerator experimental sample. The numerical calculation results show that there is one optimal pressure of primary fluid, i.e., p_popt = 0.06612 MPa, corresponding to the maximum entrainment ratio, i.e., u = 0.568; and there is one optimal pressure of secondary fluid, i.e., p_hopt = 0.04837 MPa, corresponding to the maximum entrainment ratio, i.e., u = 0.564.

Keywords refrigerator-ejector FLUENT thermodynamic parameters entrainment ratio performance

Corresponding Author(s): LIU Yicai,Email:lyccsu@mail.csu.edu.cn

Issue Date: 05 December 2010

Cite this article:

Lihong CAO,Yicai LIU,Chao WAN, et al. Effect of thermodynamic parameters on the performance of refrigerator-ejector[J]. Front Energ Power Eng Chin, 2010, 4(4): 517-521.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-010-0004-2
https://academic.hep.com.cn/fie/EN/Y2010/V4/I4/517

Fig.1 Schematic diagram of refrigerator-ejector

Fig.2 3D calculation grid of refrigerator-ejector

Fig.3 Fluid flow pressure distribution in refrigerator-ejector under four different primary fluid pressure
(a) 0.08851 MPa; (b) 0.07825 MPa; (c) 0.07195 MPa; (d) 0.06605 MPa

Fig.4 Two kinds of primary pressure (0.08851 MPa and 0.07825 MPa) distribution along the central axis of symmetry

Fig.5 Changes of entrainment ratio under different primary fluid pressures

Fig.6 Fluid flow pressure distribution in refrigerator-ejector under four different pressures of secondary fluid
(a) 0.05793 MPa; (b) 0.05061 MPa; (c) 0.04616 MPa; (d) 0.04202 MPa

Fig.7 Changes of entrainment ratio under different pressure of secondary fluid

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