Author : Prashant D. Chaudhari, Shubham G. Chordiya, Shyam S. Borade, Pankaj B. Adsul and Prof. R. S. Patil

Now-a-days IC engines are widely used. 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, resulting in to entropy rise and serious environmental pollution, so it is required to utilize waste heat into useful work. Waste heat is the heat which is generated in a process by a fuel consumption and released into the environment, though it can be used for economical and some useful purpose. Some power of IC engine is used to run alternator which reduces the mileage. The Stirling engine is used to remove the electrical load from the IC engine and thereby increasing the fuel efficiency of the engine. It works on the principle of temperature difference. This paper investigates recovery of the exhaust waste heat using a Stirling engine with internal combustion engine for the automobiles to increase the fuel economy, the useful power, and the environment safety. A Stirling engine requires only an external heat source as wasted heat for its operation. Because the exhaust gas temperature may reach 200 to 700∘C, Stirling engine will work effectively.

Keywords: Fuel efficiency, IC engine, Stirling engine, Waste heat recovery