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

Shanjun Nie, Mingfu Wang, Xiaodong Gao and Jingyu Liao
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Shanjun Nie: The Institute of Optics And Electronics, The Chinese Academy of Science, Chengdu, Sichuan 610209, China
Mingfu Wang: The Institute of Optics And Electronics, The Chinese Academy of Science, Chengdu, Sichuan 610209, China
Xiaodong Gao: The Institute of Optics And Electronics, The Chinese Academy of Science, Chengdu, Sichuan 610209, China
Jingyu Liao: The Institute of Optics And Electronics, The Chinese Academy of Science, Chengdu, Sichuan 610209, China

Energies, 2019, vol. 12, issue 1, 1-16

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.

Keywords: Thermoelectric Material Parameters; Temperature-Dependent; non-linear least squares method; electric resistance error factor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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