Design and optimization of automotive thermoelectric generators for maximum fuel efficiency improvement

被引：86
|
作者：
Kempf, Nicholas [1 ]
Zhang, Yanliang [1 ]
机构：
[1] Boise State Univ, Dept Mech & Biomed Engn, 1910 Univ Dr, Boise, ID 83725 USA
来源：
ENERGY CONVERSION AND MANAGEMENT | 2016年 / 121卷
关键词：
Automotive fuel efficiency; Thermoelectric generator; Waste heat recovery; Heat exchanger optimization; FIGURE-OF-MERIT; HALF-HEUSLER; TEMPERATURE; ENHANCEMENT; PERFORMANCE; PROGRESS; SYSTEM;
D O I：
10.1016/j.enconman.2016.05.035
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Automotive fuel efficiency can be increased by thermoelectric power generation using exhaust waste heat. A high-temperature thermoelectric generator (TEG) that converts engine exhaust waste heat into electricity is simulated based on a light-duty passenger vehicle with a 4-cylinder gasoline engine. Strategies to optimize TEG configuration and heat exchanger design for maximum fuel efficiency improvement are provided. Through comparison of stainless steel and silicon carbide heat exchangers, it is found that both the optimal TEG design and the maximum fuel efficiency increase are highly dependent on the thermal conductivity of the heat exchanger material. Significantly higher fuel efficiency increase can be obtained using silicon carbide heat exchangers at taller fins and a longer TEG along the exhaust flow direction when compared to stainless steel heat exchangers. Accounting for major parasitic losses, a maximum fuel efficiency increase of 2.5% is achievable using newly developed nanostructured bulk half-Heusler thermoelectric modules. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：224 / 231
页数：8
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