Effect of geometric dimensions on thermoelectric and mechanical performance for Mg2Si-based thermoelectric unicouple

被引：21
作者：
Mu, Yu [1 ]
Chen, Gang [1 ]
Yu, Rui [1 ]
Li, Guodong [1 ]
Zhai, Pengcheng [2 ]
Li, Peng [2 ]
机构：
[1] Wuhan Univ Technol, Dept Engn Struct & Mech, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2014年 / 17卷
基金：
中国国家自然科学基金;
关键词：
Mg2Si; TE unicouple; TE performance; Mechanical performance; Finite element method; THERMAL-STRESS ANALYSIS; RELIABILITY EVALUATION; GENERATOR; OPTIMIZATION; DESIGN; MG2SI;
D O I：
10.1016/j.mssp.2013.08.009
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The generating efficiency of thermoelectric generation (TEG) depends not only on the thermoelectric (TE) performance of TE device, but also on its mechanical performance. And choosing suitable TE materials and geometric dimension can improve the working performance of TE device. Mg2Si is one of the most promising TE materials in the medium temperature range, and Mg2Si-based TE devices have broad application prospects. In this paper, a three-dimensional finite model of the Mg2Si-based TE unicouple used for recovering vehicle exhaust waste heat is constructed for the performance analysis. The TE performance and mechanical performance of the Mg2Si-based TE unicouple under the influence of different geometric dimensions are investigated, respectively. The curves of the output power, the power conversion efficiency and the thermal stress distribution varying with different geometric dimensions are discussed in detail. The calculated result would be helpful for further understanding of the TE and mechanical properties of the Mg2Si-based TE unicouple, and it can also provide guidance for further strength check and optimum geometric design of TE unicouples in general. (C) 2013 Elsevier Ltd. All rights reserved.
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页码：21 / 26
页数：6
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