Air Conditioning System Drive by Engine Exhaust Heat

It is the established fact that only about 30% of heat supplied by the fuel is converted into useful work, in case of internal combustion (IC) engines and the rest is going waste to the atmosphere in the form of coolant losses (35%) and exhaust gas losses (35%).The conventional air conditioning system which most of the A/C vehicles use is the ‘vapor Compression refrigeration system’, in which the compressor needs mechanical work that is Higher-grade energy is then taken directly from the engine crankshaft. Thus, it ultimately reduces the brake power (B.P.) available and increasing brake specific fuel consumption. The ‘vapor absorption refrigeration system ‘utilizes the waste heat as it does not involve any compressor and hence not require great mechanical work instead of that it works directly on the heat energy i.e., low grade energy. Thus, by making proper use of lost heat (about 60–70% of total heat). The conventional air conditioning can be replaced with this system and the same effect can be experienced. The common vapor absorption refrigeration systems, which are in practice, are 1. Aqua Ammonia system, 2. Lithium Bromide water system