Modelling pressure cycle and interaction with reed valves in a reciprocating compressor

ISBN: 978-84-943928-3-2International audienceAutomatic reed valves (suction and discharge) in a reciprocating compressorare noise sources due to free vibrations and structure impacts on limiters and valve seatduring a pressure cycle. Understanding the noise source generation and propagation needsa well-modelled pressure cycle in the compressor. Modelling the pressure behaviour ina cylinder requires a robust thermodynamical/mechanical model in which both physicsinteract. A Piao-McLinden model is proposed here to simulate the behaviour of a real gaslike refrigerant. The motion of the valves is formulated as a one dimensional damped massspringsystem characterized by means of a Rayleigh method. Each model is comparedto experimental data before simulating the whole coupled system: compressor gas/reedvalve motion