LTCC-based Y-type thermoelectric generator with an improved heat flow guide for automotive waste heat recovery

被引:3
作者
Jaziri, Nesrine [1 ,2 ,3 ]
Gutzeit, Nam [1 ]
Bartsch, Heike [1 ]
Boughamoura, Ayda [4 ]
Mueller, Jens [1 ]
Tounsi, Fares [2 ]
机构
[1] Tech Univ Ilmenau, Inst Micro & Nanotechnol MacroNano, Elect Technol Grp, Gustav Kirchhoff Str 1, D-98693 Ilmenau, Germany
[2] Univ Sfax, Ecole Natl Ingenieurs Sfax, Syst Integrat & Emerging Energies SI2E, Sfax 3038, Tunisia
[3] Univ Sousse, Ecole Natl Ingenieurs Sousse, Sousse 4023, Tunisia
[4] Univ Monastir, Lab Etud Syst Therm & Energet LESTE, Ecole Natl Ingenieurs Monastir, Monastir 5019, Tunisia
关键词
HUMAN-BODY HEAT; ENERGY; PERFORMANCE; SYSTEM; PLANAR; SIMULATION; EFFICIENCY; DESIGN;
D O I
10.1039/d2se00048b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Thermoelectric generators (TEGs) are essential devices that convert thermal energy into electrical energy. TEGs are well known for their reliability, environmental friendliness, and maintenance-free operation. The fabricated low-temperature co-fired ceramic (LTCC)-based silver/silver-palladium Y-type thermoelectric generator is designed to convert a vertical distribution of heat flow into voltage through 333 laterally oriented thermocouples. It is intended to be placed between the heat exchanger and the coolant channels in the exhaust system to harvest waste thermal energy. The novel design helps to minimize the overall internal electrical resistance of the generator, which leads to higher generated electrical power. We investigated the use of aluminum-plates with pillars as heat guides combined with LTCC built-in cavities to minimize heat losses and improve the thermal yield. This technique allows increasing the electrical power by 67% compared to flat heat guides. The paper presents both simulations, based on the finite element method, and experimental measurements to validate the proposed model's accuracy. Experiments gave an output voltage of 87.3 mV and a delivered power of 260 mu W (equivalent to 1.51 mu W K-1) at Delta T = 172 degrees C for the generator TEG without cavities, while these results were 94.1 mV and 306.3 mu W (equivalent to 1.78 mu W K-1) at the same temperature difference when cavities were added.
引用
收藏
页码:2330 / 2342
页数:13
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