Computer simulation of the thermodynamic cycle of the cylinder process of compressors provides valuable information for compressor engineers. For example, the valve losses and the gas pulsation losses can be estimated from the simulation results. In general, the results of the computer simulation suggest that increasing the discharge port area always reduces the related valve loss and thus helps improve the efficiency of the compressor. However, in reciprocating compressors, a larger discharge port area tends to increase the clearance volume which may adversely affect the efficiency. Therefore, changing the discharge port area may sometimes give an unexpected result. In this work, a design procedure is proposed to determine the optimum discharge port area which balances these two conflicting effects by utilizing computer simulation program. A possible experimental method is also suggested to obtain empirical parameters necessary to use the proposed design procedure.
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