BibTeX:

@article{IJIRSTV1I11031,
     title={DESIGN AND ANALYSIS OF HEAT EXCHANGER FOR AUTOMOTIVE EXHAUST BASED THERMOELECTRIC GENERATOR [TEG]},
     author={ROHAN MATHAI CHANDY, RAKESH RAJEEV, RICHU LONAPPAN JOSE, THOMAS LUKOSE and NANDU S},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={1},
     number={11},
     pages={291--298},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV1I11031.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

In internal combustion engines the thermal efficiency is around 30 %, roughly 30% of the fuel energy is wasted in exhaust gases, and 30% in cooling water and 10% are unaccountable losses. Efforts are made to catch this 30 % energy of exhaust gases. If this waste heat energy is tapped and converted into usable energy, the overall efficiency of an engine can be improved. Thermoelectric modules which are solid state devices that are used to convert thermal energy to electrical energy from a temperature gradient and it work on principle of Seebeck effect. This paper demonstrates the potential of thermoelectric generation. A hot side heat exchanger as well as cold side heat exchanger was designed and analyzed. After certain analytical studies it is found that heat exchanger positioned between catalytic converter and muffler has higher surface temperature. Thermoelectric modules of Bismuth Telluride (Bi2Te3) were selected according to the temperature difference between exhaust gases side (between catalytic converter and muffler) and the engine air conditioner evaporator as cold side. A circular heat exchanger with fins was designed and the thermo electric modules were placed on the heat exchanger for performance analysis. The study showed that energy can be tapped from engine exhaust.

Seebeck Effect, Thermoelectric Generator, Heat Exchanger, Thermoelectric Materials and Bismuth Telluride