Performance evaluation of a novel thermoelectric module with BiSbTeSe-based material

Luo, Ding; Wang, Ruochen; Yu, Wei; Zhou, Weilin

doi:10.1016/j.apenergy.2019.01.139

Cited by 41 publications

(20 citation statements)

References 36 publications

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“…Consequently, the influences of the leg height ( h ), the leg cross‐sectional area ( A ), the height ( h ce ) and thermal conductivity ( λ ce ) of ceramic plates, and the natural convection heat transfer coefficient ( h a ) on the power output and thermal‐to‐electric conversion efficiency are studied in this section. In addition, we found that the load resistance at the highest output power ( R max_P ) is larger than its internal resistance in our previous study 40 . Here, the reasons for this phenomenon and its influencing factors are investigated, taking the TE couple as the research object.…”

Section: Comprehensive Analysis Of a Conventional π‐Type Te Couplementioning

confidence: 78%

“…Additionally, TE couples with different TE materials may have different optimum S p / S n values, and four typical materials (Figure S2) are selected for simulation, including BiTe‐based 29 alloys ( T h = 500 K, T c = 300 K), p‐type 30 and n‐type 31 PbTe‐based alloys ( T h = 700 K, T c = 350 K), p‐type 32 and n‐type 33 SiGe‐based alloys ( T h = 1000 K, T c = 500 K), p‐type NbFeSb‐based half‐Heusler alloys, 34 and n‐type CoSb‐based half‐Heusler alloys 35 ( T h = 1000 K, T c = 500 K). Here, the representative data of the Seebeck coefficient, electrical resistivity, and thermal conductivity are selected from the above literature, and these data are obtained by a polynomial fitting method 40,41 . Among these references, some studies only refer to one kind of material; other studies refer to various materials due to the difference in doping concentration and elements, and the better one was adopted in this research.…”

Section: Structural Optimization and Performance Investigation For Thmentioning

confidence: 99%

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Parametric study of asymmetric thermoelectric devices for power generation

Luo

Wang

et al. 2020

Int J Energy Res

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Summary Thermoelectric devices are considered a promising technique for recycling waste heat. In the present work, a three‐dimensional numerical model is developed to study the output performance of thermoelectric devices. A comprehensive analysis is performed based on a conventional π‐type thermoelectric couple. The results indicate that the maximum power of thermoelectric devices generally increases with a decrease in height and an increase in cross‐sectional area; the maximum efficiency exhibits the opposite trends. The best way to reduce heat losses is by using ceramic plates with higher thermal conductivity. Moreover, the parasitic internal resistance exists in the thermoelements, and its influencing factors are studied. To minimize electric losses, an asymmetric structure is proposed for thermoelectric devices. The results exhibit that the optimal cross‐sectional area ratio of the p‐type and n‐type legs (Sp/Sn) is mainly contingent upon the thermoelectric material parameters; the greater the differences in the parameters of p‐type and n‐type thermoelectric materials, the greater the gains provided by the asymmetric structure. Furthermore, the experimental data present great consistency with the numerical results. The research results may help guide the design of thermoelectric devices with relatively lower power losses.

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Section: Comprehensive Analysis Of a Conventional π‐Type Te Couplementioning

confidence: 78%

Section: Structural Optimization and Performance Investigation For Thmentioning

confidence: 99%

Parametric study of asymmetric thermoelectric devices for power generation

Luo

Wang

et al. 2020

Int J Energy Res

Self Cite

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“…It is well known that TE power is maximized when the external load is slightly higher than the internal resistance of TE systems. 38 Using this concept, power is calculated by a range of external resistance values, and the TE power is reported where the external load resistance matches the internal resistance. In ANSYS numerical model, three-dimensional, 20-node coupling element SOLID226 was used to simulate TEG system, and a general circuit element, CIRCU124, was selected to define the load resistance similar to the reference study.…”

Section: Numerical Simulations For Thermoelectric Energy Conversionmentioning

confidence: 99%

Numerical analysis of energy conversion efficiency and thermal reliability of novel, unileg segmented thermoelectric generation systems

Aljaghtham

Çelik

2021

Int J Energy Res

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Despite their great potential to recover waste heat, thermoelectric generators (TEGs) find limited usage since thermoelectric materials are only efficient within a limited temperature range. Using multiple materials in segmented TEGs can significantly enhance the overall energy conversion efficiency. However, thermal reliability is questionable in these systems especially at elevated temperatures and in annular configurations. This study explores the feasibility of utilizing unileg (single material) segmented TEG configuration as a remedy for the thermal stress problem. This study introduces the concept of unileg, segmented thermoelectric configurations (flat and annular) for the first time, and three-dimensional finite element simulations are conducted to investigate the thermoelectric performance and thermal reliability analysis in comparison with the conventional unicouple (dual material) systems. Results indicate that thermal stresses are significantly lowered in unileg systems compared to the unicouple configuration. In addition to the enhanced thermal reliability, power generation and thermoelectric conversion efficiency are higher in unileg systems since the material with higher performance is used solely eliminating the need of poorly performing, second thermoelectric leg material.

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“…Several mathematical models of thermoelectric modules are proposed such as standard simplified models, improved simplified models and complex TE models. 3 Based on the employed models, researchers tend to account 6,15,[17][18][19]31 or neglect 5,8,[12][13][14]29,38,39 the Thomson effect in their investigations. In this regard, the influence of Thomson effect on the present model is also investigated to see the impact of this term on power output of the module.…”

Section: Influence Of Thomson Effect On Performance Of Tegmentioning

confidence: 99%

“…Three dimensional models have also been used to obtain the optimum geometrical characteristics of thermoelectric generators 28,29 . But this application is not very common and most studies utilize the three‐dimensional model for performance evaluations 30,31 . Meng et al 28 established a multi‐physics three‐dimensional model to study the performance of TEG modules and also compared the results with the classic thermal resistance model solutions.…”

Section: Introductionmentioning

confidence: 99%

A hybrid analytical‐computational method for three dimensional modeling of thermoelectric generators

2020

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Summary A hybrid analytical‐computational method is developed to calculate the temperature distribution and electrical performance of thermoelectric generators (TEG). The geometrical complexities of thermo‐elements in real modules are ignored and the TEG is assumed to be made of five distinct layers. The power output is obtained by algebraic expressions and considered as a heat sink expression in the energy equation. The coupling of thermoelectric and energy equations is handled by developing user defined functions (UDF) in the numerical solution procedure. Accordingly, the heat flow is divided into two parts accounting for the thermoelectric phenomena and the Fourier conduction in the thermoelectric layer. The model is validated and the accuracy of the results is examined against two detailed simulations as well as the available experimental data. It is shown that the model is accurate with an average deviation of 8% to 10% compared to the experiments which is only 4% to 5% higher than the detailed rigorous numerical solutions. The influence of Thomson effect is also found to be around 1%. Moreover, the effect of element numbers with a certain amount of material is investigated and it is revealed that the appropriate number of elements depends on the module temperature due to the Thomson effect.

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Performance evaluation of a novel thermoelectric module with BiSbTeSe-based material

Cited by 41 publications

References 36 publications

Parametric study of asymmetric thermoelectric devices for power generation

Parametric study of asymmetric thermoelectric devices for power generation

Numerical analysis of energy conversion efficiency and thermal reliability of novel, unileg segmented thermoelectric generation systems

A hybrid analytical‐computational method for three dimensional modeling of thermoelectric generators

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