Tuesday, December 28, 2010
In the system, liquid refrigerant under high pressure flows from liquid receiver to pressure reducing valve (expansion valve) and into evaporator. Here pressure is greatly reduced. Liquid boils and absorbs heat from evaporator. Now a vapor refrigerant, flows back to compressor and is compressed to high pressure. Its temperature is greatly increased. In the condenser, heat is transferred to the surrounding air and the refrigerant cools, becoming liquid again. It flows back into the liquid receiver and the cooling cycle is repeated.