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Thermoelectric generators are long-life electricity generators that operate according to the Seebeck thermoelectric effect and produce DC voltage by utilizing the temperature difference on hot and cold surfaces, without moving parts. The ability to generate electricity directly in any situation where the temperature difference between the surfaces of the thermoelectric modules arises makes it possible to generate electricity from the first time in the exhaust systems of the internal combustion engines. It is very important to examine the recovery of the thermoelectric generators in the heating process in the internal combustion engines due to the reduced generator efficiency at low revs. In this study, thermoelectric generators were used to provide exhaust heat recovery in heating process of an internal combustion gasoline engine, electrical gains obtained at three different temperature averages were investigated and experimental and simulated results were compared. A maximum ΔT = 165 °C temperature difference was obtained between the module surfaces. In the experiments performed, ΔT = 165 °C, RL = 10 Ω load resistance, maximum 6.75 V voltage, 0.65 A current is obtained. Experimental and simulation results are generally in coherence.

Termoelektrik jeneratörler, Seebeck termoelektrik etkisine göre çalışan, sıcak ve soğuk yüzeylerde sıcaklık farkından yararlanarak DC gerilim üreten, hareketli parçaları olmayan uzun ömürlü elektrik üreteçleridir. Termoelektrik modüllerin yüzeyleri arasında sıcaklık farkının meydana geldiği her durumda doğrudan elektrik üretebilmesi içten yanmalı motorların egzoz sistemlerinde ilk çalışmadan itibaren elektrik üretimini mümkün kılmaktadır. Düşük devirlerde alternatör veriminin azalması sebebiyle termoelektrik jeneratörlerin içten yanmalı motorlarda ısınma sürecinde geri kazanımının incelenmesi oldukça önemlidir. Bu çalışmada termoelektrik jeneratörler kullanılarak içten yanmalı benzinli bir motorun ısınma sürecinde egzoz atık ısı geri kazanımı sağlanmış, oluşan 3 farklı sıcaklık farkında elde edilen elektriksel kazanımlar incelenmiş, deneysel ve benzetim sonuçları karşılaştırılmıştır. Modül yüzeyleri arasında maksimum ∆T=165 °C sıcaklık farkı elde edilmiştir. Yapılan deneylerde ΔT=165 °C, RL=10 Ω yük direncinde maksimum 6.75 V gerilim, 0.65 A akım elde edilmiştir. Deneysel ve benzetim sonuçları genel olarak uyumludur.

Thermoelectric generators are long-life electricity generators that operate according to the Seebeck thermoelectric effect and produce DC voltage by utilizing the temperature difference on hot and cold surfaces, without moving parts. The ability to generate electricity directly in any situation where the temperature difference between the surfaces of the thermoelectric modules arises makes it possible to generate electricity from the first time in the exhaust systems of the internal combustion engines. It is very important to examine the recovery of the thermoelectric generators in the heating process in the internal combustion engines due to the reduced generator efficiency at low revs. In this study, thermoelectric generators were used to provide exhaust heat recovery in heating process of an internal combustion gasoline engine, electrical gains obtained at three different temperature averages were investigated and experimental and simulated results were compared. A maximum ΔT = 165 °C temperature difference was obtained between the module surfaces. In the experiments performed, ΔT = 165 °C, RL = 10 Ω load resistance, maximum 6.75 V voltage, 0.65 A current is obtained. Experimental and simulation results are generally in coherence. [ABSTRACT FROM AUTHOR]