Evaluation of thermoelectric generators by I-V curves

Gao, Min ORCID: https://orcid.org/0000-0001-9591-5825, Singh, Tanuj, Garcia-Canadas, Jorge and Ellor, Robert 2016. Evaluation of thermoelectric generators by I-V curves. Journal of Electronic Materials 45 (3) , pp. 1700-1704. 10.1007/s11664-015-4180-z

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Abstract

A recent theoretical study proposes a new way to evaluate thermoelectric devices by measuring two I–V curves—one obtained under a constant temperature difference and the other obtained for a constant thermal input. We report an experimental demonstration of the feasibility of this novel technique. A measurement system was designed and constructed, which enables both types of I–V curves to be obtained automatically. The effective ZT values of a thermoelectric module were determined using this system and compared with those measured by an impedance spectroscopy technique. The results confirm the validity of the proposed technique. In addition, the capability of measuring ZT under a large temperature difference was also investigated. The results show that the ZTs obtained for a large temperature difference are significantly smaller than those for a small temperature difference, providing insights into the design and operation of thermoelectric modules in realistic applications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Publisher:	Springer
ISSN:	0361-5235
Funders:	EU
Date of First Compliant Deposit:	30 March 2016
Date of Acceptance:	24 October 2015
Last Modified:	23 May 2023 16:53
URI:	https://orca.cardiff.ac.uk/id/eprint/82186

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