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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

EFFECTS OF HEATING AND COOLING CHARACTERISTICS ON THERMOELECTRIC GENERATOR PERFORMANCE

Feng Wang
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, College of Power Engineering, Chongqing University, Chongqing 400030, P. R. China; College of Power Engineering, Chongqing University, Chongqing 400030, P. R. China

Penglai Li
College of Power Engineering, Chongqing University, Chongqing 400030, P. R. China

Long Wang
College of Power Engineering, Chongqing University, Chongqing 400030, P. R. China; College of Mechanical Engineering, Chongqing University, Chongqing 400030, P. R. China; China Construction Science & Technology Group Co., Ltd, Shenzhen, Guangdong 518000, P. R. China

Bohong Chen
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, College of Power Engineering, Chongqing University, Chongqing 400030, P. R. China

Ling Yao
College of Power Engineering, Chongqing University, Chongqing 400030, P. R. China

DOI: 10.1615/IHTC16.mpe.023296
pages 6081-6087


KEY WORDS: Thermoelectric devices, Energy efficiency, waste heat, heat source

Abstract

Heating and cooling characteristics are very important on thermoelectric generator (TEG) performance. In this study, effects of heating and cooling characteristics on thermoelectric module performance were investigated through experiments. Results showed that, open-circuit voltage of thermoelectric module was proportional to the cold and hot side temperature difference, the rule is U=0.035ΔT. Output power was proportional to heating source temperature. With the increasing of heating temperature from 120°C to 260°C, output power increased from 3W to 10.5W. TEG Power generating efficiency increased from 4.16% at 200°C to 4.34% at 260°C. Variation of thermoelectric maximum power with current was obtained. With the increasing of cooling flow rate from 0.2L/min to 0.6L/min, generating efficiency increased from 5.3W to 6.8W, it stabilized at flow rate of 1.2L/min. Cold side temperature decreased and temperature difference between cold and hot side of the thermoelectric module increased with the increasing flow rate.

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