Modeling a Thermoelectric Generator Applied to Diesel Automotive Heat Recovery

被引：142

作者：

Espinosa, N. ^{[1
,2
]}

Lazard, M. ^{[3
]}

Aixala, L. ^{[2
]}

Scherrer, H. ^{[1
]}

机构：

[1] Phys Mat Lab, Nancy, France

[2] Renault Trucks SAS, St Priest, France

[3] GIP InSIC, St Die, France

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2010年 / 39卷 / 09期

关键词：

Thermoelectric generator; modeling; EES; heat recovery; truck diesel engine;

D O I：

10.1007/s11664-010-1305-2

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：

Thermoelectric generators (TEGs) are outstanding devices for automotive waste heat recovery. Their packaging, lack of moving parts, and direct heat to electrical conversion are the main benefits. Usually, TEGs are modeled with a constant hot-source temperature. However, energy in exhaust gases is limited, thus leading to a temperature decrease as heat is recovered. Therefore thermoelectric properties change along the TEG, affecting performance. A thermoelectric generator composed of Mg2Si/Zn4Sb3 for high temperatures followed by Bi2Te3 for low temperatures has been modeled using engineering equation solver (EES) software. The model uses the finite-difference method with a strip-fins convective heat transfer coefficient. It has been validated on a commercial module with well-known properties. The thermoelectric connection and the number of thermoelements have been addressed as well as the optimum proportion of high-temperature material for a given thermoelectric heat exchanger. TEG output power has been estimated for a typical commercial vehicle at 90A degrees C coolant temperature.

引用

页码：1446 / 1455

页数：10

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