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Influence of Thermoelectric Properties and Parasitic Effects on the Electrical Power of Thermoelectric Micro-Generators

Author

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  • Soufiane El Oualid

    (Institut Jean Lamour, UMR 7198 CNRS-Université de Lorraine, 2 Allée André Guinier-Campus ARTEM, BP 50840, CEDEX, 54011 Nancy, France)

  • Francis Kosior

    (Institut Jean Lamour, UMR 7198 CNRS-Université de Lorraine, 2 Allée André Guinier-Campus ARTEM, BP 50840, CEDEX, 54011 Nancy, France)

  • Gerhard Span

    (Mahle Thermoelektronik GmbH, 47059 Duisburg, Germany
    Present address: SAM GmbHandCoKG, Himmelreichweg 4, A-6112 Wattens, Austria.)

  • Ervin Mehmedovic

    (Mahle Thermoelektronik GmbH, 47059 Duisburg, Germany
    Present address: STAUFFEN Quality Engineers GmbH, Blumenstraße 5, 73257 Köngen, Germany.)

  • Janina Paris

    (Mahle Thermoelektronik GmbH, 47059 Duisburg, Germany
    Present address: RBH Logistics GmbH, Talstraße 12, 45966 Gladbeck, Germany.)

  • Christophe Candolfi

    (Institut Jean Lamour, UMR 7198 CNRS-Université de Lorraine, 2 Allée André Guinier-Campus ARTEM, BP 50840, CEDEX, 54011 Nancy, France)

  • Bertrand Lenoir

    (Institut Jean Lamour, UMR 7198 CNRS-Université de Lorraine, 2 Allée André Guinier-Campus ARTEM, BP 50840, CEDEX, 54011 Nancy, France)

Abstract

Heat recovery systems based on thermoelectric micro-generators (µ-TEGs) can play a significant role in the development of wireless, energetically autonomous electronics. However, to date, the power density recovered for low temperature differences using µ-TEGs is limited to a few micro-watts or less, which is still insufficient to power a wide-range of wireless devices. To develop more efficient µ-TEGs, material, device and system requirements must be considered simultaneously. In this study, an innovative design of an in-plane µ-TEG integrating bismuth telluride forming sinusoidal-shaped trenches is reported. Using 3D numerical modelling, the influence of boundary conditions, parasitic effects (electrical and thermal contact resistances), and transport properties of thermoelectric materials on the output power of these µ-TEGs are investigated in detail for a small temperature difference of 5 K between the hot and cold sources. Compared to wavy-shaped trenches, this novel shape enables enhancing the output power. The results show that either the thermal conductivity or the Seebeck coefficient of the active n- and p-type semiconductors is the key parameter that should be minimized or maximized, depending on the magnitude of the parasitic effects.

Suggested Citation

  • Soufiane El Oualid & Francis Kosior & Gerhard Span & Ervin Mehmedovic & Janina Paris & Christophe Candolfi & Bertrand Lenoir, 2022. "Influence of Thermoelectric Properties and Parasitic Effects on the Electrical Power of Thermoelectric Micro-Generators," Energies, MDPI, vol. 15(10), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3746-:d:819520
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    References listed on IDEAS

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    2. We, Ju Hyung & Kim, Sun Jin & Cho, Byung Jin, 2014. "Hybrid composite of screen-printed inorganic thermoelectric film and organic conducting polymer for flexible thermoelectric power generator," Energy, Elsevier, vol. 73(C), pages 506-512.
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