Revisiting the temperature dependence in material properties and performance of thermoelectric materials

Ju, Chengjian; Dui, Guansuo; Zheng, Helen Hao; Xin, Libiao

doi:10.1016/j.energy.2017.02.020

Cited by 39 publications

(14 citation statements)

References 32 publications

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“…Since the TE properties of SnSe have a complex temperature dependence, 8 th and 9 th order polynomial fits were used for fitting the material properties. Conventionally, perturbation solution is obtained using Taylor or Maclaurin series [25][26][27] expansion and this very fact makes the solution convergent. Consequently, these traditional methods require parameterization and complicated analytical computation [38].…”

Section: B Calculation Of the Exact Temperature Profile Through Integ...mentioning

confidence: 99%

“…Apart from CPM, there are also simplified models based on assuming different analytical formulations for the T dependencies of the material properties [16,[22][23][24] and/or different mathematical functions for 𝑇(𝑥) [25][26][27]. For example, recently, Ryu et al [24] suggested an interesting model based on the exact theory, with linear assumption of 𝛼(𝑇) and 𝜅𝜌(𝑇) which holds good for most of the thermoelectric materials.…”

Section: Introductionmentioning

confidence: 99%

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Using the constant properties model for accurate performance estimation of thermoelectric generator elements

2020

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Section: B Calculation Of the Exact Temperature Profile Through Integ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using the constant properties model for accurate performance estimation of thermoelectric generator elements

2020

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“…If the properties are treated as temperature-dependent, then the exact analytical solution of Equation (11) cannot be obtained. Several works focus on this aspect [46][47][48][49][50], thereby providing interesting findings. However, the predicted results with constant properties provide comprehensive predictions.…”

Section: Discussion On the Heat Flux Predictionmentioning

confidence: 99%

Compact Water-Cooled Thermoelectric Generator (TEG) Based on a Portable Gas Stove

Lv¹,

Zheng

et al. 2018

Energies

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A compact water-cooled thermoelectric generator (TEG) based on a portable gas stove was designed and analyzed to supply electricity in off-grid scenarios. The TEG incorporates a newly designed heat collector, eight thermoelectric (TE) modules, and a radiator to ensure its portability (5.9 kg) and sufficiency of electric power (12.9 W). Detailed measurements and discussions on power load feature and TE efficiency are presented. Experiments showed that the power generation capability of the proposed TEG is compromised by its compactness over previous water-cooled TEGs. A theoretical model incorporated with heat leaks from various origins has been developed to illustrate that the designed TEG exerts the potential of every TE module, and to reveal the proportion of various heat fluxes. The predicted electric power, various heat fluxes, and TE efficiency agree well with experimental data. The limitations of TE efficiency and the nonlinearity caused by Joule heat are discussed quantitatively.

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“…Wee [29] developed a theoretical analysis to solve the differential equations governing the thermoelectric devices based on the assumption of the linear variation of the temperature over P-N couples, but he neglected real physical phenomena such as temperature mismatching conditions. Ju et al [30] performed a similar investigation considering only a linear variation of the Seebeck coefficient and electrical resistivity; no mismatching conditions were considered in the analysis. Therefore, current models neglect the combined effect of physical phenomena like thermal dependence of properties and the mismatching boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Thermoelectric Generators under Mismatching Conditions

2021

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Due to the wide usability of thermoelectric generators (TEG) in the industry and research fields, it is plausible that mismatching conditions are present on the thermal surfaces of a TEG device, which induces negative-performance effects due to uneven surface temperature distributions. For this reason, the objective of this study is to characterize numerically the open-circuit electric output voltage of a TEG device when a mismatching condition is applied to both the cold and hot sides of the selected N and P-type semiconductor material Bi0.4Sb1.6Te3. A validated numerical simulation paired with a parametric study is conducted using the Thermal-Electric module of ANSYS 2020 R1, for which different thermal boundary and mismatching conditions are applied while considering the temperature-dependent thermoelectrical properties of the N and P-type material. The results show an inverse relationship between the open-circuit voltage and the mismatching temperature difference. When a mismatching condition is applied on the hot side of the TEG device, the temperature-dependent electrical resistance has lower values, deriving in higher voltage results (linear tendency) compared to a mismatching condition applied to the cold side (non-linear tendency).

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Revisiting the temperature dependence in material properties and performance of thermoelectric materials

Cited by 39 publications

References 32 publications

Using the constant properties model for accurate performance estimation of thermoelectric generator elements

Using the constant properties model for accurate performance estimation of thermoelectric generator elements

Compact Water-Cooled Thermoelectric Generator (TEG) Based on a Portable Gas Stove

Evaluation of Thermoelectric Generators under Mismatching Conditions

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