Characterization of thermal contacts between heat exchangers and a thermoelectric module by impedance spectroscopy
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Other documents of the author: Beltrán-Pitarch, Braulio; Vidan-Falomir, Francisco; García-Cañadas, Jorge
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7034
comunitat-uji-handle3:10234/8619
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Title
Characterization of thermal contacts between heat exchangers and a thermoelectric module by impedance spectroscopyDate
2019Publisher
ElsevierISSN
1359-4311Bibliographic citation
BELTRÁN-PITARCH, Braulio; VIDAN, Francisco; GARCÍA-CAÑADAS, Jorge. Characterization of thermal contacts between heat exchangers and a thermoelectric module by impedance spectroscopy. Applied Thermal Engineering, 2019, p. 114361Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/submittedVersionSubject
Abstract
Heat to electricity energy conversion efficiency of a thermoelectric (TE) device is not only influenced by the TE materials properties, but it also depends on the temperature difference between both sides of the TE ... [+]
Heat to electricity energy conversion efficiency of a thermoelectric (TE) device is not only influenced by the TE materials properties, but it also depends on the temperature difference between both sides of the TE legs. Keeping this temperature difference as close as possible to the temperature difference between the heat sink and the heat source is crucial to maximize the TE device performance. However, achieving this is quite difficult, mainly due to the thermal contact resistance at the interfaces between the TE module and the heat sink/source. In this study, it is analyzed the effect of this thermal contact resistance on the impedance spectroscopy response of a TE module that is thermally contacted by two aluminum blocks, which act as heat exchangers. A new theoretical model (equivalent circuit) that takes into account the thermal contact resistance is developed, which includes two new elements that depend on this parameter. The equivalent circuit is tested with experimental impedance measurements where the thermal contact is varied. It is demonstrated that using this equivalent circuit the thermal contact resistivity can be easily determined, which opens up the possibility of using impedance spectroscopy as a tool to quantify and monitor this crucial property for the TE device performance. [-]
Is part of
Applied Thermal Engineering, 2019Investigation project
Generalitat Valenciana; Universitat Jaume I: UJI-A2016-08; European Social Fund: ACIF/2018/233;Agencia Estatal de Investigación: RYC-2013-13970Rights
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