Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Prediction of Gas Leakage in the Piston-Cylinder Clearance of Reciprocating Compressors
Submission Author:
Vitor de Melo Braga , SC
Co-Authors:
Cesar Deschamps
Presenter: Vitor de Melo Braga
doi://10.26678/ABCM.ENCIT2016.CIT2016-0035
Abstract
The leakage of gas through the piston-cylinder clearance of reciprocating compressors can significantly reduce the volumetric and isentropic efficiencies, especially in low-capacity compressors. This paper presents a model based on the compressible Reynolds equation to predict such a leakage, which is then coupled with a model that simulates the compression cycle. Some geometric parameters of the cylinder and the piston velocity are investigated in order to determine their effects on the gas leakage and volumetric and isentropic efficiencies. The results reveal that the piston velocity plays an important role in gas leakage, an aspect that was not observed in previous incompressible flow models available in the literature.
Keywords
Refrigeration compressor, Reciprocating compressor, Piston-cylinder clearance, Leakage
