Abstract
The dynamics of the flatter valves inside a hermetic reciprocating compressor used in household appliances is the most important factor concerning the gas dynamic behaviour of such a compressor. Hence for a good valve design and for a reliable simulation of the compressor the ability to predict the movement of the valves is indispensable. The present paper describes a methodology which allows the prediction of the valve dynamics. For the validation of the methodology the simulation results of the suction valve dynamics have been compared with experimental data obtained out of measurements with a Laser-Doppler-Vibrometer. Furthermore the method has been used for the variation of some suction valve parameters and their influence onto the overall compressor performance has been shown. The whole methodology has been implemented into a commercial available CFD code (FLUENT) as a user defined function (UDF).
Highlights
Efficiency is an important factor in the field of reciprocating compressors used in household appliances
The vaporized refrigerant enters the compressor through the suction pipe which interfuse the shell
From the shell the refrigerant is sucked into the suction muffler, the main aim of this muffler is to keep the superheating of the gas as low as possible while at the same time keeping the pressure loss during the suction process as low as possible
Summary
Efficiency is an important factor in the field of reciprocating compressors used in household appliances. From the shell the refrigerant is sucked into the suction muffler, the main aim of this muffler is to keep the superheating of the gas as low as possible while at the same time keeping the pressure loss during the suction process as low as possible. It consists of a combination of various chambers for the damping of selected acoustic frequencies. The valve is a flat plate of steel which is actuated by the forces induced by the acting pressures It is the most important part which affects the pressure loss during the suction phase of the reciprocating compressor.
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