Parametric study of a thermoelectric generator system for exhaust gas energy recovery in diesel road freight transportation

被引：71
作者：
Vale, S. [1 ,2 ]
Heber, L. [1 ]
Coelho, P. J. [2 ]
Silva, C. M. [3 ]
机构：
[1] German Aerosp Ctr DLR, Inst Vehicle Concepts, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
[2] Univ Lisbon, Inst Super Tecn, IDMEC, P-1699 Lisbon, Portugal
[3] Univ Lisbon, Fac Ciencias, Inst Dom Luiz, P-1699 Lisbon, Portugal
来源：
ENERGY CONVERSION AND MANAGEMENT | 2017年 / 133卷
关键词：
Energy recovery; Thermoelectric generator; Exhaust gas heat transfer; Diesel vehicles for freight transport; HEAT-EXCHANGERS; PERFORMANCE; MODEL; OPTIMIZATION;
D O I：
10.1016/j.enconman.2016.11.064
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A parametric study and optimization approaches of a thermoelectric generator (TEG) for the recovery of energy from the exhaust gas in Diesel vehicles used in freight transport is reported. The TEG is installed in the tailpipe of a commercial vehicle (3.5 tonnes) and a heavy-duty vehicle (40 tonnes). The exhaust gas is used as the heat source and the cooling water as the heat sink. Two different heat exchanger configurations are considered: plain fins and offset strip fins. The influence of the height, length and spacing of the fins on the electrical and net power is analysed for the fixed width and length of the TEG. The influence of the length and width of the TEG and of the height of the thermocouple legs is also investigated. According to the criteria used in this study, plain fins are the best choice, yielding a maximum electrical power of 188 W for the commercial vehicle and 886 W for the heavy-duty vehicle. The best recovery efficiency is about 2%, with an average thermoelectric material efficiency of approximately 4.4%, for the light-duty vehicle. Accordingly, there is significant room for further improvement and optimisation based on the thermoelectric modules and the system design. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：167 / 177
页数：11
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