Water Cooling System Using Engine Exhaust Heat

Many new technologies are emerging and developing in automobile sector and moreover it has proven its importance in human life time to time. For the human comfort air conditioning is provided in vehicle. In automobile air conditioning normally vapour compression refrigeration cycle is used. The cycle run on engine power and consumes around 10% of the total power produced by the engine and thereby increases the fuel consumption. To avoid this fuel consumption, the same air conditioning effect can be achieved by using vapour adsorption system without using engine power. The work presented in this paper gives the overall idea about design, development & implementation of water cooling system by using exhaust of the engine with same condenser & evaporator unit. The exhaust is feed to adsorber bed which is filled with carbon activated charcoal & R134a as a refrigerant. This refrigerant get evaporated and passed through the stainless steel coil which acts as an evaporator. The normal temperature water is passed through this evaporator coil. For primary stage this concept is implemented on two wheeler engine. This concept will be implement on four wheeler for air conditioning purpose. The water cooling system is powered by exhaust heat using two control valve with same condenser and evaporator unit. The cooling capacity for 2 liter water is estimated 0.28kW. A system has been designed and developed. A cooling effect of 0.28kW can be obtained. The expected COP of the system is in the range of 0.2 to 0.25. The dimensions of the system are compact. It can be easily accommodated on a domestic two wheeler. The total weight of the system for a cooling capacity of 0.28 kW is 5kg. The heating time required to achieve the cooling effect will be around 15 minutes. Total time to complete cycle will be around 45 minutes. Keywords: Absorber bed, Ammonia, Evaporation, R134a, Refrigeration System.