The Influence of Leg Shape on Thermoelectric Performance Under Constant Temperature and Heat Flux Boundary Conditions

Şişik, Bengisu; LeBlanc, Saniya

doi:10.3389/fmats.2020.595955

Cited by 36 publications

(17 citation statements)

References 34 publications

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“…This design requirement will provide mechanical rigidity to the device and thus the heat source and the sink demands minimum engineering efforts. [87][88] However, with the pre defined operating temperature range and material properties which include both thermoelectric and contact material, the performance of the flat geometry and bulk thermoelectric devices is dictated by the geometric factor which includes configuaratrion and organization of thermoelectric legs, i. e. area ratio of the n-and p-type leg, cross-sectional area of the individual legs, gap between the adjacent thermoelements and the length of the legs. Theoretical stimulations were carried out extensively as a guide for designing the actual thermoelectric generators.…”

Section: Flat Plate Cuboidal Thermoelectric Devicementioning

confidence: 99%

“…This step is highly crucial due to the geometrical requirement of the thermoelectric legs which are typically in milimeters and only a few micrometer difference in height is permissible. This design requirement will provide mechanical rigidity to the device and thus the heat source and the sink demands minimum engineering efforts [87–88] …”

Section: Structural Design Of Thermoelectric Devicesmentioning

confidence: 99%

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Thermoelectric Modules: Key Issues in Architectural Design and Contact Optimization

Basu

2023

ChemNanoMat

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Interplay between the phonons and electrons makes thermoelectric engineering enigmatic.In recent years, substantial improvement in the performance of thermoelectric materials has drawn considerable attention in experimenting their prospective applications in the thermoelectric technology. It serves as a bond between the thermoelectric alloys/materials and the modules/devices and so needs to be meticulously planned, engineered and integrated to gratify the performance of the thermoelectric products either for cooling or power generation. Here, the principle of thermo-electricity has been discussed along with the different feasible architectures and synthesis methodologies. In addition, the review also discusses the role of contact engineering, as the reliability of the thermoelectric devices depends on the overall assemblage. Moreover, thermoelectric applications are limited to niche markets wherever the need of reliability surpasses the requirement of conversion efficiency. Thus, contact issues which includes thermomechanical stresses at the interface, bonding strength and resistance at the interface are also discussed.

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Section: Flat Plate Cuboidal Thermoelectric Devicementioning

confidence: 99%

Section: Structural Design Of Thermoelectric Devicesmentioning

confidence: 99%

Thermoelectric Modules: Key Issues in Architectural Design and Contact Optimization

Basu

2023

ChemNanoMat

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“…The group of Professor LeBlanc explored several leg shapes and their influence on the power output of TEGs. Although some of the shapes are difficult to realize experimentally, their work confirmed the importance of leg geometry on optimized TEGs. , A thorough review on this topic brought a compilation of results, in which device geometries are correlated with the thermoelectric efficiency and power output …”

Section: Introductionmentioning

confidence: 96%

“…Therefore, the heat flux parameter calculated in our modeling protocol considers the Thomson effect, validating the use of eq to calculate the overall device efficiency. Several strategies have been reported to increase the efficiency (η TE ), ranging from synthesizing new materials to producing hybrid devices. , The most common route, however, is still the search for new materials and composites with high ZT values. − Nonetheless, it is known that the overall device geometry can play an important role on the properties of electrical and thermal systems. − Of great interest here is the optimization of the geometry of the thermoelectric legs . For instance, when reducing the length of the thermoelectric legs to about 55% of their original size, there was a 10% increase in the conversion efficiency and a 48% increase in the output efficiency .…”

Section: Introductionmentioning

confidence: 99%

Geometry Optimization for Miniaturized Thermoelectric Generators

et al. 2023

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Thermoelectric materials capable of converting heat into electrical energy are used in sustainable electric generators, whose efficiency has been normally increased with incorporation of new materials with high figure of merit (ZT) values. Because the performance of these thermoelectric generators (TEGs) also depends on device geometry, in this study we employ the finite element method to determine optimized geometries for highly efficient miniaturized TEGs. We investigated devices with similar fill factors but with different thermoelectric leg geometries (filled and hollow). Our results show that devices with legs of hollow geometry are more efficient than those with filled geometry for the same length and cross-sectional area of thermoelectric legs. This behavior was observed for thermoelectric leg lengths smaller than 0.1 mm, where the leg shape causes a significant difference in temperature distribution along the device. It was found that for reaching highly efficient miniaturized TEGs, one has to consider the leg geometry in addition to the thermal conductivity.

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“…The laboratory-scale thermoelectric module showed a 75% increase in power generation compared with the module having cuboid legs. More leg shapes were modeled to determine their electrical potential and power output using the finite element method 51 . These include cuboid, trapezoid, hourglass, Y-shaped, and hollow legs and different arrangements of these legs.…”

Section: Introductionmentioning

confidence: 99%

Optimizing thermocouple’s ZT through design innovation

Zhang

2021

Preprint

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In this work, we demonstrate that in parallel with the one existed at high doping concentration, there also exists an optimal combination of the transport properties of a thermoelectric material at low doping concentration as the curve of the relationship between electrical conductivity and doping concentration is rigidly shifted toward lower doping concentration without disturbing the Seebeck coefficient and the thermal conductivity. Based on this finding, a new concept for thermocouple design is developed to improve the thermocouple’s efficiency and power output. The analytical model developed for the new thermocouple indicated that its efficiency and power output can be more than tripled as compared to those of the original design. A single thermocouple made of Silicon semiconductors was simulated numerically using different sets of input parameters. The results showed that the new thermocouple’s efficiency and power output can be improved significantly.

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The Influence of Leg Shape on Thermoelectric Performance Under Constant Temperature and Heat Flux Boundary Conditions

Cited by 36 publications

References 34 publications

Thermoelectric Modules: Key Issues in Architectural Design and Contact Optimization

Thermoelectric Modules: Key Issues in Architectural Design and Contact Optimization

Geometry Optimization for Miniaturized Thermoelectric Generators

Optimizing thermocouple’s ZT through design innovation

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