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Energies 2019, 12(1), 169; https://doi.org/10.3390/en12010169

Extraction of Temperature-Dependent Thermoelectric Material Parameters of a Thermoelectric Cooler by the Non-Linear Least Squares Method

1
The Institute of Optics And Electronics, The Chinese Academy of Science, Chengdu, Sichuan 610209, China
2
University of Chinese Academy of Science, Beijing 100149, China
*
Author to whom correspondence should be addressed.
Received: 4 December 2018 / Revised: 29 December 2018 / Accepted: 30 December 2018 / Published: 4 January 2019
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

This paper presents a method of extracting temperature-dependent parameters of thermoelectric material from the operating conditions of thermoelectric cooler (TEC). Based on the finite element method of calculating TEC’s performance, non-linear least squares method is used for extracting temperature-dependent material parameters including the seebeck coefficient, electrical resistivity and thermal conductivity (α, ρ, κ) as operating current, thermal load and hot end temperature are taken as inputs and cooling temperature is taken as output. To further improve the voltage calculation accuracy, the electric resistance error factor which includes electrical contact resistance and the calculation model error is extracted with the voltage being output on the basis of extracted material parameters. The cooling temperature and voltage of another TEC with the same thermoelectric material are recalculated by the extracted parameters and the exact parameters provided by manufacturer respectively. Compared with the experimental results, the extracted material parameters have the advantages of high accuracy, wide application ranges and easily implementing in evaluating TECs’ performance. View Full-Text
Keywords: Thermoelectric Material Parameters; Temperature-Dependent; non-linear least squares method; electric resistance error factor Thermoelectric Material Parameters; Temperature-Dependent; non-linear least squares method; electric resistance error factor
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Nie, S.; Wang, M.; Gao, X.; Liao, J. Extraction of Temperature-Dependent Thermoelectric Material Parameters of a Thermoelectric Cooler by the Non-Linear Least Squares Method. Energies 2019, 12, 169.

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