Development Of Thermoelectric Power Generator (TEG) Based Hi-Z Thermoelectric Modules For Automotive Waste Heat Recovery

Mohamad Firdaus, Sukri and Nur Rashid, Mat Nuri and Shafizal, Mat and Mohd Afzanizam, Mohd Rosli (2011) Development Of Thermoelectric Power Generator (TEG) Based Hi-Z Thermoelectric Modules For Automotive Waste Heat Recovery. Project Report. UTeM. (Submitted)

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Abstract

In automobiles, coolant system is one of the systems that producing waste heat. This waste heat is a form of energy. It is neither created nor destroyed. but it is transformed. Therefore by using TEG, it is possible to transform waste beat from engine coolant to electricity. A lot of researches have been done to investigate the potential of exhaust systems as a source of heat for TEG compared to other components. In coolant systems, lack of research in this system is due to the low temperature of the coolant itself. Nevertheless, there is no detail investigation has been done yet. The advantage of TEG being installed in this system is it can reduce work done by the engine in cooling down the coolant temperature, thus more power produce by the engine can be used for other vehicle operations. Therefore, in this project, it is proposed to investigate the potential of this system as a source of heat for TEG. ln this project, a model of coolant based-TEG with eight of HZ-20 thermoelectric modules are developed and fabricated for 4G 13 SOHC Mitsubishi engine. Experimental investigations are done by using thermocouples and SF-902 Engine Dynamometer. In this research, the maximum power produced by the TEG is 1.36 W (theory) and 0.82 W (experiment) at engine rpm of 4000 rpm. The efficiency of this TEG at this point is 60%. It is due to highest operating temperature of the coolant and the TEG itself providing highest temperature to hot side area of the TEG.

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