Effect of Leg Topologies on Thermal Reliability of Thermoelectric Generators Systems

Mutabe Aljaghtham, Emrah Celik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Increasing the temperature gradient across thermoelectric (TE) devices improves the TE power output significantly. However, enhanced thermal gradients lead to high thermal stresses and these stresses must be taken into consideration in the design process to develop TE systems with enhanced thermal reliability. The shape of TE leg plays a major role on the performance of these systems. Conventional prismatic TE leg structure has been the preferred leg topology commonly utilized in TE devices due to its simplicity and high thermoelectric performance. Other leg topologies have also been considered in the literature to quantify their effects on TE performance. This current study investigates the thermal reliability of a several TE leg topologies such as trapezoidal leg, butterfly leg, vertical and horizontal cross-shaped leg, X-leg, Y-leg, I-leg according to the construction of each shape. 3D numerical model is presented to quantify the Von Mises stresses of these configurations and compared to conventional rectangular TE leg shape. The vertical cross-shaped and butterfly configurations generate 36% and 27% TE power higher than the conventional rectangular TE leg, respectively. On the other hand, the conventional TE leg has the lowest thermal stress compared to other TE leg topologies.

Original languageEnglish (US)
Title of host publicationEnergy
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791885635
DOIs
StatePublished - 2021
Externally publishedYes
EventASME 2021 International Mechanical Engineering Congress and Exposition, IMECE 2021 - Virtual, Online
Duration: Nov 1 2021Nov 5 2021

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume8A-2021

Conference

ConferenceASME 2021 International Mechanical Engineering Congress and Exposition, IMECE 2021
CityVirtual, Online
Period11/1/2111/5/21

Keywords

  • TE leg configuration
  • TEG thermal stress. TE simulation
  • Thermoelectric generator

ASJC Scopus subject areas

  • Mechanical Engineering

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