A Review on Waste Heat Recovery and Utilization from Exhaust Gas of I.C Engine

In many applications I.C engine is used as primary power source. Out of the total heat supplied to the I.C engine in the form of fuel 30-40% heat is converted into useful work and remaining 60-70 % as a part of waste heat as friction, exhausts gas and engine cooling system. Through the exhaust of engine 30-40 % of heat is lost to the environment. Rapid economy development results in increasing energy demand, consequently fuel consumption and fuel prices which results in environmental pollution. This attracts the researchers to find more energy efficient techniques and concentrates on hard work on investigation of suitable waste heat recovery system. Waste heat utilization reduces the fuel (fossil fuel) consumption and reduces the amount of waste heat and greenhouse gases. A significant waste heat recovery systems or methods have been developed to recover the heat from exhaust gas of I.C engine. This article shows the Benefits of waste heat recovery, the available waste heat from I.C engine, Amount of heat carried away by exhaust gas and possible techniques to recover the heat from exhaust gas of I.C. engine. Waste heat recovery system is the best solution to recover waste heat to reduce waste heat, fuel consumption and pollution.