Numerical simulation of thermoelectric performance of linear-shaped thermoelectric generators under transient heat supply

Jia, Xiaodong; Wang, Zhengliang; Gao, Yuanwen

doi:10.1016/j.energy.2017.04.072

Cited by 22 publications

(9 citation statements)

References 35 publications

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“…Thermoelectric (TE) generator is a new type of energy conversion device. Based on the electronic transport of TE functional materials [1], it can directly realize the mutual conversion between thermal energy and electrical energy, with the advantages of small size, light weight, no moving parts, no noise, no pollution, long service life, high reliability [2][3][4][5]. It has broad application prospects in space exploration, solar energy, automobile industry, medical treatment and many other fields [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of Thermoelectric Generators with Application on Aerodynamic Heat Recovery

et al. 2021

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Based on thermoelectric generators (TEGs), an aerodynamic heat energy recovery system for vehicle is proposed. A mathematical model describing the energy conversion law of the system is established, and the integrated calculation method which combined aerodynamic heating and thermoelectric (TE) conversion is given. Furthermore, the influences of the typical flight Mach number, flight altitudes and the length of TE legs on the energy conversion behavior of energy recovery systems are investigated. The performance of the energy recovery system is analyzed and evaluated. The results show that, the decrease of flight altitude and the increase of Mach number will obviously improve the performance of the heat energy recovery system with TEGs. The increase of leg length will increase the temperature of the hot end of TEGs and reduce the heat absorbed at the hot end. When the external load, Mach number and flight altitude is fixed, there exists an optimal length of legs corresponding to the maximum output power and maximum conversion efficiency of the system. The results will have significant positive impact on thermal protection and management of supersonic/hypersonic vehicles.

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Section: Introductionmentioning

confidence: 99%

Performance Assessment of Thermoelectric Generators with Application on Aerodynamic Heat Recovery

et al. 2021

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“…With the development of thermoelectric materials (TEMs) [1,2], the thermoelectric generator (TEG) began to be widely used in waste heat recovery [3,4]. The TEG is usually applied to convert thermal energy into electrical energy by exploiting the Seebeck effect [5,6]. This is based on the temperature gradient between the hot and cold sides of thermoelectric elements, which results in heat flux through these elements, a small percentage of which is converted into electrical power [7,8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Nonlinear Transient Energy Effect on Thermoelectric Energy Storage Structure

Zhu

Kong

et al. 2020

Materials

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In complex flight conditions, due to the large amount of unusable heat generated by aerodynamic heating, the thermal protection system of an aircraft needs to withstand a large temperature shock, which brings great challenges to the design of the structure. In order to effectively utilize the irregular aerodynamic heat, and improve structural heat conduction, a composite structure is formed by using phase change energy storage materials on the basis of the thermoelectric structure, which transforms the aerodynamic waste heat into stable electric energy for the internal system. Through the study of the response of nonlinear transient energy, it is found that the thermoelectric and mechanical properties of the new structure can be improved by adding phase change energy storage materials. Under actual flight conditions, the new structure can reduce the maximum temperature by 180 K and the maximum thermal stress by 110 Mpa. The mechanical properties of the structure are effectively improved, the service life of the structure is prolonged, and the waste heat can be converted into stable electrical energy output to improve the thermoelectric output performance. On the premise of ensuring conversion efficiency, the output power of the new structure has been improved by 64.8% through structural optimization under actual flight conditions.

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“…For better accuracy, two‐dimensional models are also proposed for TEG modules 8‐10 . In the same manner as the one‐dimensional modeling, these approaches tend to both account or neglect some certain effects.…”

Section: Introductionmentioning

confidence: 99%

“…For better accuracy, two-dimensional models are also proposed for TEG modules. [8][9][10] In the same manner as the one-dimensional modeling, these approaches tend to both account or neglect some certain effects. Jia et al 9 proposed a two-dimensional model with temperature dependent properties, while neglecting heat losses as well as contact resistances.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10] In the same manner as the one-dimensional modeling, these approaches tend to both account or neglect some certain effects. Jia et al 9 proposed a two-dimensional model with temperature dependent properties, while neglecting heat losses as well as contact resistances. Besides, Kim 10 developed a model which accounts all thermoelectric effects as well as thermal and electrical resistances.…”

Section: Introductionmentioning

confidence: 99%

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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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Numerical simulation of thermoelectric performance of linear-shaped thermoelectric generators under transient heat supply

Cited by 22 publications

References 35 publications

Performance Assessment of Thermoelectric Generators with Application on Aerodynamic Heat Recovery

Performance Assessment of Thermoelectric Generators with Application on Aerodynamic Heat Recovery

Analysis of Nonlinear Transient Energy Effect on Thermoelectric Energy Storage Structure

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

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