Principal Parts of a Simple Vapour Compression System

Principal Parts of a Simple Vapour Compression System Points : Principal Parts of a Simple Vapour Compression System, Evaporator, Suction Line, Compressor, Discharge Line, Condenser, Liquid Receiver, Liquid Line, Expansion valve Are briefly described in the following lines: 1. Evaporator Its function is to provide a heat transfer surface through which heat can pass from the refrigerated space into the vaporizing refrigerant. 2. Suction Line It carries the low pressure vapour from the evaporator to suction in let of the compressor. 3. Compressor The function of the compressor is to draw refrigerant vapour from the evaporator and to raise It temperature and pressure to such a print to that it may be easily condensed with normally available condensing media. It also maintains a continuous flow of the refrigerant through the system. 4. Discharge Line It conveys the high pressure and high temperature refrigerant from the compressor to the condenser. 5. Condenser The function of the condenser is to provide a heat transfer surface through which heat passes from the refrigerant to the condensing medium which is either water or air. 6. Liquid Receiver It acts as, a reservoir which stores the liquid refrigerant coming from the condenser and supplies it to the evaporator according to the requirement. 7. Liquid Line It carries the liquid refrigerant from the receiver and conveys it to the expansion valve. 8. Expansion valve Its function is to Supply a proper amount of refrigerant to the evaporator after reducing its pressure considerably so that the refrigerant may take sufficient amount of heat from the refrigerating space during evaporation.