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1. Fabrication of Skutterudite-Based Tubular Thermoelectric Generator

Author

Hanhwi Jang, Jong Bae Kim, Abbey Stanley, Suhyeon Lee, Yeongseon Kim, Sang Hyun Park, and Min-Wook Oh

Subjects
tubular thermoelectric generator (tteg), skutterudite, joining, specific contact resistance, power density, Technology
Abstract

The conversion efficiency of the thermoelectric generator (TEG) is adversely affected by the quality of thermal contact between the module and the heat source. TEGs with the planar substrate are not suitable for the curved heat sources. Several attempts have been made to tackle this issue by fabricating complex tubular-shaped TEGs; however, all efforts have been limited to low-temperature applications. Furthermore, the electrical contact resistance of the module is critical to achieving a high-power output. In this work, we developed the tubular TEG with significantly low specific contact resistance by optimizing the joining process. We show that the modified resistance welding (MRW) performed by spark plasma sintering (SPS) is an efficient joining method for the fabrication of the TE module, with high feasibility and scalability. This research seeks to suggest important design rules to consider when fabricating TEGs.

Published
2020
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2. Fabrication of Skutterudite-Based Tubular Thermoelectric Generator

Author

Sang Hyun Park, Jong Bae Kim, Min-Wook Oh, Yeongseon Kim, Abbey Stanley, Hanhwi Jang, and Suhyeon Lee

Subjects
Control and Optimization, Fabrication, Materials science, joining, Energy Engineering and Power Technology, Mechanical engineering, 02 engineering and technology, 010402 general chemistry, Electric resistance welding, 01 natural sciences, lcsh:Technology, Electrical and Electronic Engineering, Engineering (miscellaneous), Renewable Energy, Sustainability and the Environment, lcsh:T, skutterudite, Contact resistance, Energy conversion efficiency, Thermal contact, power density, 021001 nanoscience & nanotechnology, specific contact resistance, Electrical contacts, 0104 chemical sciences, Thermoelectric generator, Electricity generation, tubular thermoelectric generator (tteg), 0210 nano-technology, Energy (miscellaneous)
Abstract

The conversion efficiency of the thermoelectric generator (TEG) is adversely affected by the quality of thermal contact between the module and the heat source. TEGs with the planar substrate are not suitable for the curved heat sources. Several attempts have been made to tackle this issue by fabricating complex tubular-shaped TEGs, however, all efforts have been limited to low-temperature applications. Furthermore, the electrical contact resistance of the module is critical to achieving a high-power output. In this work, we developed the tubular TEG with significantly low specific contact resistance by optimizing the joining process. We show that the modified resistance welding (MRW) performed by spark plasma sintering (SPS) is an efficient joining method for the fabrication of the TE module, with high feasibility and scalability. This research seeks to suggest important design rules to consider when fabricating TEGs.

Published
2020

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