FATC 20 9. CONDENSER AND RECEIVER DRIER CONDENSER The condenser is a heat exchanger used to cool the hot vaporised refrigerant. Also the refrigerant changes its state from vapour to liquid. The condenser is placed behind the radiator. Cooling fan is placed behind the condenser to pull ambient air through radiator and condenser. CONDENSER SEALING DUCTS Sealing’s are used to guide the flow of the air to the condenser and also to avoid the hot air recirculating from the engine compartment to the condenser. RECEIVER DRIER (R.D) The receiver drier is integrated into the Condenser and has three main functions. 1. It absorbs the moisture in the refrigerant. 2. It allows only liquid (high pressure liquid) to pass through to the TXV. 3. It keeps a reserve of refrigerant to accommodate fluctuating refrigerant requirements. 10. CHILLER UNIT The chiller unit is heat exchanger and it is used to cool the coolant which is used for battery cooling. Chiller consist of plate type heat exchanger, Thermostatic Expansion vale (TXV) with inbuilt solenoid valve. After condenser, liquid refrigerant flows through TXV and refrigerant temperature drops. Low temperature refrigerant enters from chiller inlet (refrigerant channel) and come out from chiller outlet. Similarly high temperature coolant comes from battery and enters in the chiller (coolant channel). It gets cool inside chiller and low temperature coolant comes out from chiller. ON / OFF type inbuilt solenoid valve used to control refrigerant flow through the chiller. 11. COOLANT PUMP Coolant Pump is used to circulate coolant in the battery cooling system (BCS). It operates on low voltage and it gets signals from VCU. COOLANT PUMP Pump is used to circulate coolant in the battery cooling system (BCS). It operates on low voltage and its signals from VCU.
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