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

Automatic reed valves (suction and discharge) in a reciprocating compressor are noise sources due to free vibrations and structure impacts on limiters and valve seat during a pressure cycle. Understanding the noise source generation and propagation needs a well-modelled pressure cycle in the compressor. Modelling the pressure behaviour in a cylinder requires a robust thermodynamical/mechanical model in which both physics interact. A Piao-McLinden model is proposed here to simulate the behaviour of a real gas like refrigerant. The motion of the valves is formulated as a one dimensional damped massspring system characterized by means of a Rayleigh method. Each model is compared to experimental data before simulating the whole coupled system: compressor gas/reed valve motion