Investigation of the Thermodynamic Process of the Refrigerator Compressor Based on the m- ? Diagram

Tao Wang, Zhilong He, Jun Guo and Xueyuan Peng
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Tao Wang: School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Zhilong He: School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Jun Guo: Nanjing Engineering Institute of Aircraft Systems, Shuige Road 33, Nanjing 211106, China
Xueyuan Peng: School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2017, vol. 10, issue 10, 1-14

Abstract: The variation of refrigerant mass in the cylinder of refrigerator compressor has a great influence on the compressor’s thermodynamic process. In this paper, the m- ? diagram, which represents the variation of refrigerant mass in compressor cylinder (m) and the crank angle ( ? ), is proposed to investigate the thermodynamic process of the refrigerator compressor. Comparing with the traditional pressure-Volume (p-V) indicator diagram, the refrigerant’s backflow trigged by the delayed closure of valve can be clearly expressed in the m- ? diagram together with the mass flow rate. A typical m- ? diagram was obtained by experimental and theoretical investigations. To improve the thermodynamic model of the compressor, a 3D fluid-structure interaction (FSI) FEA model has been introduced to find out the effective flow area of the valves. Based on the m- ? diagram, the effect of rotating speed on the backflow through the valve, which depends on the movement of the valve, has been investigated. Specific to the compressor used in this study, the maximum backflow through the suction valve and discharge valve occur at 3500 r·min ?1 and 5500 r·min ?1 , respectively.

Keywords: thermodynamic model; m- ? diagram; mass flow rate; rotation speed; refrigerator compressor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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