Hi, I am a final year B.Tech student in ME. As a part of the seminar presentation I want to create ppt on waste heat recovery from IC Engine using TEG. And I find it difficult to get one. I hope you guys can help me.
-Regards
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The demand for more fuel-efficient vehicles has been steadily growing and will only continue to increase given the volatility in the commodity market of oil resources. The internal combustion engine (IC) uses about one-third of the chemical energy released during combustion. The remaining two-thirds are rejected from the engine through cooling and exhaust systems. Significant improvements in fuel conversion efficiency are possible through the capture and conversion of these residual energy flows. Promising residual heat recovery (WHR) techniques include turbocharging, turbo mixing, Rankine engine composition and thermoelectric generators (TE). These techniques have shown increases in thermal engine efficiencies ranging from 2% to 20%, depending on system design, power recovery quality, component efficiency and implementation. The purpose of this paper is to provide a comprehensive review of advances in waste heat recovery methods; Thermoelectric generators (TEG) and Rankine cycles for electricity generation, which have occurred over the last 10 years, as these two techniques have been at the forefront of current research for their untapped potential.
The IC engine is approximately one-third efficient in converting energy into fuel to mechanical work. The remaining energy is lost through the waste heat that is predominantly rejected from the engine through the cooling and exhaust systems. To improve fuel economy in cars with IC engines, various techniques are being investigated to recover this residual thermal energy. Two of the most promising techniques to be discussed in this article are the thermoelectric generators and the Rankine cycle. Depending on the operating conditions, engine type and location of temperature measurement, exhaust gas temperatures range from 500 C to 600 C, with maximum values up to 1000 C while coolant temperatures range from 100 C and 130 C. The thermal energy in the exhaust gas varies from 4.6 to 120 kW and from 9 to 48 kW for the cooling system.
