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International Heat Transfer Conference 15

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

Design Optimization of Automobile Exhaust Thermoelectric Generator for Waste Heat Recovery

DOI: 10.1615/IHTC15.tel.008789
pages 8021-8032

Zhiqiang Niu
State Key Laboratory of Engines, Tianjin University, 92 Weijin Rd, Tianjin, China, 300072

Qianshan Li
State Key Laboratory of Engines, Tianjin University, 92 Weijin Rd, Tianjin, China, 300072

Wangbo He
State Key Laboratory of Engines, Tianjin University, 92 Weijin Rd, Tianjin, China, 300072

Yongzhan Huo
State Key Laboratory of Engines, Tianjin University, 92 Weijin Rd, Tianjin, China, 300072

Kui Jiao
State Key Laboratory of Engines, Tianjin University, 92 Weijin Rd, Tianjin, China, 300072


KEY WORDS: Thermoelectric devices, Heat transfer enhancement, three-dimensional model, heat and mass transfer characteristics, performance

Abstract

The exhaust of automobile engine contains considerable amount of waste heat, which can be potentially recovered by thermoelectric generator (TEG). Nowadays, it becomes critically important to recover such waste heat for improving the overall energy conversion efficiency due to the increasing demand on energy saving. Moreover, the heat transfer processes need to be optimized to improve the waste heat recovery efficiency. In this study, a three-dimensional model for automobile exhaust thermoelectric generator module (AETEM) system is developed. The heat and fluid flow in exhaust flow field, heat transfer in TEG module, and electron generation and transport are all coupled in this numerical model. The performance and heat and mass transfer characteristics with two designs of the exhaust flow channel are investigated based on this three-dimensional model. It is found that proper design optimization, such as placing fastigiate bafflers in flow channel, can improve the performance of TEG module significantly.

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