Determination of the oil distribution in a hermetic compressor using numerical simulation

10th International Conference on Compressors and their Systems

Posch, S.^1 ; Hopfgartner, J.^1 ; Berger, E.^1 ; Zuber, B.^1 ; Almbauer, R.^1 ; Schöllauf, P.^2

Graz University of Technology, Graz

8010, Austria^1

Secop Austria GmbH, Fürstenfeld

8280, Austria^2

关键词: Compressor shells;    Hermetic compressors;    Hermetic reciprocating compressor;    Input parameter;    Model validation;    Oil distributions;    Software ANSYS;    Steady-state condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/232/1/012009/pdf
DOI  :  10.1088/1757-899X/232/1/012009

来源: IOP

【 摘 要 】

In addition to the reduction of friction the oil in a hermetic compressor is very important for the transfer of heat from hot parts to the compressor shell. The simulation of the oil distribution in a hermetic reciprocating compressor for refrigeration application is shown in the present work. Using the commercial Computational Fluid Dynamics (CFD) software ANSYS Fluent, the oil flow inside the compressor shell from the oil pump outlet to the oil sump is calculated. A comprehensive overview of the used models and the boundary conditions is given. After reaching steady-state conditions the oil covered surfaces are analysed concerning heat transfer coefficients. The gained heat transfer coefficients are used as input parameters for a thermal model of a hermetic compressor. An increase in accuracy of the thermal model with the simulated heat transfer coefficients compared to values from literature is shown by model validation with experimental data.