Real gas model for an electric swashplate refrigeration compressor

被引：2

作者：

Arqam, Mohammad ^{[1
]}

Dao, Dzung Viet ^{[1
]}

Jahangiri, Amir ^{[2
]}

Mitchell, Mark ^{[2
]}

Woodfield, Peter ^{[1
]}

机构：

[1] Griffith Univ, Sch Engn & Built Environm, Brisbane, Qld, Australia

[2] Unicla Int Ltd, Ormeau, Qld, Australia

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION | 2020年 / 118卷

关键词：

Real gas model; Refrigerant compressor; Swashplate; Volumetric efficiency; RECIPROCATING-COMPRESSORS; THERMODYNAMIC ANALYSIS;

D O I：

10.1016/j.ijrefrig.2020.05.025

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A real-gas, restricted-flow valve model is compared with an ideal-gas, ideal-valve model for a 10-cylinder swashplate refrigeration compressor. Real gas properties of R134a are evaluated using the NIST standard reference database. A minor-loss discharge-coefficient approach is used to model the refrigerant flow rate through reed valves while the ideal-valve model requires no pressure difference to open the valve. In contrast with the ideal model, the discharge temperature, refrigerant mass flow rate and volumetric efficiency as a function of rotational speed are predicted well by including real-gas properties and flow restriction on the inlet valve. The ideal-gas model significantly overpredicts the discharge temperature and shows no dependence on rpm. Heat transfer to and from the cylinder wall during compression and expansion is found to have only a small effect on predictions of compressor performance. The valve model for the suction side has the largest influence on compressor performance predictions as a function of rpm. (C) 2020 Elsevier Ltd and IIR. All rights reserved.

引用

页码：210 / 219

页数：10

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