Module Geometry and Contact Resistance of Thermoelectric Generators Analyzed by Multiphysics Simulation |
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Authors: | D Ebling K Bartholomé M Bartel M Jägle |
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Affiliation: | (1) Imec, Kapeldreef 75, 3001 Leuven, Belgium |
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Abstract: | Thermoelectric device performance is determined by not only the properties of the thermoelectric material but also the geometrical
design and thermal matching of the materials. Leg length and contact quality strongly influence thermoelectric generator efficiency.
Experimental results for contact properties are compared with the latest performance measurements on modules manufactured
from Bi2Te3 compounds. Module performance is related to the obtained contact resistance and thermoelectric material properties. The different
influences are studied using thermoelectric multiphysics finite-element modeling of examples where, in addition to the thermoelectric
field equations, further effects such as convection and radiation as well as the temperature dependency of the material properties
are taken into account. Extensive thermoelectric device modeling is used to understand the experimental findings with respect
to contact properties and geometry. |
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Keywords: | |
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