Comparison of different fluid-thermal-electric multiphysics modeling approaches for thermoelectric generator systems

Luo, Ding; Wang, Ruochen; Yan, Yuying; Sun, Zeyu; Zhou, Weiqi; Ding, Renkai

Abstract

This work proposes a novel fluid-thermal-electric multiphysics numerical model to predict the performance of thermoelectric generator systems applied to fluid waste heat recovery, with the consideration of multiphysics coupling effects of fluid, thermal, and electric fields. The comprehensive numerical simulations of the thermoelectric generator system are performed via COMSOL coupled solver. Besides, the effect of the neglect of parasitic heat on the output performance is investigated through the comparison with numerical results predicted by ANSYS and COMSOL separate solver, wherein the fluid-thermal field is computed first, then the thermal-electric field. The results show that the output power predicted by COMSOL separate solver is 8.52% lower than that predicted by COMSOL coupled solver at the inlet air temperature of 550 K and inlet air velocity of 30 m/s due to the neglect of parasitic heat. The output performance of the TEG system predicted by ANSYS is less affected by inlet air boundary conditions than that predicted by COMSOL. Finally, the experimental results show that the fluid-thermal-electric multiphysics model solved by the COMSOL coupled solver shows the lowest output power deviation of 2.81%. The proposed model can guide the numerical modeling of the thermoelectric generator system applied to fluid waste heat recovery.

Citation

Luo, D., Wang, R., Yan, Y., Sun, Z., Zhou, W., & Ding, R. (2021). Comparison of different fluid-thermal-electric multiphysics modeling approaches for thermoelectric generator systems. Renewable Energy, 180, 1266-1277. https://doi.org/10.1016/j.renene.2021.09.033

• Journal Article Type: Article
• Acceptance Date: Sep 6, 2021
• Online Publication Date: Sep 8, 2021
• Publication Date: 2021-12
• Deposit Date: Sep 20, 2021
• Publicly Available Date: Sep 9, 2022
• Journal: Renewable Energy
• Print ISSN: 0960-1481
• Electronic ISSN: 1879-0682
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 180
• Pages: 1266-1277
• DOI: https://doi.org/10.1016/j.renene.2021.09.033
• Keywords: Renewable Energy, Sustainability and the Environment
• Public URL: https://nottingham-repository.worktribe.com/output/6292163
• Publisher URL: https://www.sciencedirect.com/science/article/abs/pii/S0960148121013318
• Additional Information: This article is maintained by: Elsevier; Article Title: Comparison of different fluid-thermal-electric multiphysics modeling approaches for thermoelectric generator systems; Journal Title: Renewable Energy; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.renene.2021.09.033; Content Type: article; Copyright: © 2021 Elsevier Ltd. All rights reserved.