Advance Physics Letter ________________________________________________________________________________ ISSN (Print) : 2349-1094, ISSN (Online) : 2349-1108, Vol_1, Issue_1, 2014 53 Exhaust Waste Heat Recovery System Neha Tiwari 1 , Appu Kumar Singh 2 1 Assistant Professor, Department of Mechanical Engineering, Bhilai Institute of Technology, Raipur, India 2 U. G. Student, Department of Mechanical Engineering, Bhilai Institute of Technology, Raipur, India Email: 1 nehu.tiwari@gmail.com, 2 appusingh94242@gmail.com, Abstract. The current worldwide trend of rapid economy development and increasing energy demand in transportation sector are one of many segments that is responsible for growing share of fossil fuel usage. Supply and demand for fuel is accelerating prices and eventually will affect availability. The selected contemporary paper will address on how a prototype stirling engine capable of harnessing waste heat spilling out of typical engine exhaust and to fight against the tyranny of inefficiency. Stirling engine systems are fuel flexible with respect to source of thermal energy and unprocessed waste heat that resulting in entropy rise can be harvested to power ancillaries and increase overall efficiency. The preliminary prototype design and methodology follows process, heat to mechanical energy and latter to electrical energy. Experimental verification of analytical data was carried out and presented here. Shortcomings of these methods are highlighted and an alternative approach to solve particulars suggested. Keywords:Fossil Fuel,Waste Heat, Stirling Engine, Harnessing,Efficiency, Electrical Energy INTRODUCTION Any physical activity in this world whether by human beings or by nature is caused due to flow of energy in one form or the other. Energy is most basic infrastructure input required for economic growth and development of a country. Also, energy has been life blood for continual progress of human civilization. Thus, with an increase in living standard of human beings, energy consumption also accelerated. Per capita consumption of a country is an index of standard of living [2]. In an era of expensive fuel and concern, automobile has come under increasing scrutiny with consumers looking for ways to extend mileage. Also, the automotive world is on the verge of a major shift in paradigm, essaying a revival of end of the 19 th century where electric vehicles were rule rather than exception. Oil prices shot up four folds causing severe energy crisis the world over. This result in spiraling price rise of various commercial energy sources leading to global inflation. It’s hardly a revolutionary number, until being considered that world consumes 85 billion barrels of oil a day [2]. In fact, reducing global impacts of conventional energy resources and meeting the growing energy demand had motivated considerable research attention in a wide range of engineering application of energy.In general within an automobile, two-thirds of the fuel used is emitted as waste heat. In total, about 30% of the energy supplied is converted into useful work; about 30% is lost as exhaust heat and some energy is lost in friction, compression and direct rejection. The rest of the energy about 30%, has to be removed by cooling system [1]. Less attention has been put until recently on recovery of waste heat in vehicle. The use of turbo-charger is also a way of recovering a portion of exhaust gas energy, although the deployment of such device may be problematic, especially for petrol engines [1].BMW researchers in Munich, Germany, have utilized steam technology to harness the wasted heat energy in the exhaust system of their cars [3]. Fig.1 Heat balance for a typical engine Stirling engines could be utilized as possible alternative viable approach to recover waste heat.A stirling engine is a heating engine operating by cyclic compression and expansion of air or other gas. However, stirling engine unique feature that, if ideal stirling thermosynamic cycle were practically realizable the efficiency of a frictionless stirling engine would be the same as that of a Carnot cycle engine,i.e., the maximum theoretically attainable in any heat engine [1,3].