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To improve fuel consumption, hybrid system, turbo-charged engine, and clean diesel engine vehicles have been developed. These new systems require additional heat exchangers which reduces air flow rate within the heat exchangers of an engine cooling module. Consequently, power of cooling fan is increased. CalsonicKansei (CK) has developed a new cooling module “SLIM” (Single Layer Integrated cooling Module). This consists of a current condenser which is air-cooled and a new water-cooled condenser. This water cooled condenser is specifically designed to bring superheated refrigerant vapor to saturated conditions. The water-cooled condenser is located inside of the sub-radiator tank. The operation of the sub-radiator is to provide cooling to charge air cooler (CAC) and to water-cooled condenser. The switch of the operation is done automatically without any valve and any actuator.