EXPERIMENTAL INVESTIGATIONS ON PASSIVE DEVICES IN A VCR SYSTEM WITH R600a REFRIGERANT

Vapour compression system the process of throttling is isenthalpic, which means that the kinetic energy produced during the pressure reduction is dissipated and eventually wasted. Through the action of passive devices (diffuser and nozzle), the compression section pressure higher than it would be in standard cycle and increases flow of the refrigerant. In domestic refrigerator the power consumption increases with increase in compression load. The diffuser provides additional compression to the refrigerant which reduces the mechanical work required for the compressor and reduces vibrations in system, nozzle provides increase in flow which provides more refrigeration effect.