Thermoelectric generator (TEG) technologies and applications

Jouhara, Hussam; Żabnieńska–Góra, Alina; Khordehgah, Navid; Doraghi, Qusay; Ahmad, Lujean; Norman, Les; Axcell, Brian; Wrobel, L.C.; Dai, Sheng

doi:10.1016/j.ijft.2021.100063

Cited by 260 publications

(124 citation statements)

References 65 publications

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“…Lately, there has been much research on harvesting higher energy from the TEG by dropping lattice thermal conductivity to improve ZT, which is done by working on the material. Research has gone so far in improving the materials, such as silicon-nanowire of high power TEG, nanotechnology [36], or nanostructures [132]. Over the recent period, a promising technology renowned as nano-inclusion, which is the formation of nano-composite, is proved to enhance the power factor electrical or thermal conductivity [133], where merging inorganic-organic nano-materials conquer the limitation of mono-phase TEG to attain higher ductile strength and manageable Seebeck coefficients in nanocomposite materials [134].…”

Section: Low Thermal Conductivity (κE)mentioning

confidence: 99%

Thermoelectric Power Generators: State-of-the-Art, Heat Recovery Method, and Challenges

et al. 2021

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Electricity plays a significant role in daily life and is the main component of countless applications. Thus, ongoing research is necessary to improve the existing approaches, or find new approaches, to enhancing power generation. The thermoelectric generator (TEG) is among the notable and widespread technologies used to produce electricity, and converts waste energy into electrical energy using the Seebeck effect. Due to the Seebeck effect, temperature change can be turned into electrical energy; hence, a TEG can be applied whenever there is a temperature difference. The present paper presents the theoretical background of the TEG, in addition to a comprehensive review of the TEG and its implementation in various fields. This paper also sheds light on the new technologies of the TEG and their related challenges. Notably, it was found that the TEG is efficient in hybrid heat recovery systems, such as the phase change material (PCM), heat pipe (HP), and proton exchange membrane (PEM), and the efficiency of the TEG has increased due to a set of improvements in the TEG’s materials. Moreover, results show that the TEG technology has been frequently applied in recent years, and all of the investigated papers agree that the TEG is a promising technology in power generation and heat recovery systems.

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Section: Low Thermal Conductivity (κE)mentioning

confidence: 99%

Thermoelectric Power Generators: State-of-the-Art, Heat Recovery Method, and Challenges

et al. 2021

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“…They have no moveable materials; they are compact; they are noise-free; and they are suited quite well for solar energy and waste heat conversion to electricity using car exhausts [7], stoves and PV panels. The phenomena occurring in TEG and possible applications have been extensively discussed by H. Jouhara et al in [8].…”

Section: Introductionmentioning

confidence: 99%

“…It is understood that thermoelectric element (TE) modules are comparatively inefficient. Therefore, different studies have been performed to increase the working performance of the generators, including modifications in the structural properties [11], changes in the geometry of the legs [12], enhancing the figure of merit [13], and optimisation of the mechanical system and functioning temperatures [8]. Annular TE generators were implemented to enhance the operating performance of thermoelectric generators (TEGs) by altering its geometric structure and parameters, and Fraisse et al [14] stated that the variable segment had an effect on thermoelectric performance.…”

Section: Introductionmentioning

confidence: 99%

Investigation and Computational Modelling of Variable TEG Leg Geometries

et al. 2021

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In this work, computational modelling and performance assessment of several different types of variable thermoelectric legs have been performed under steady-state conditions and the results reviewed. The study conducted has covered geometries, not previously analysed in the literature, such as Cone-leg and Diamond-leg, based on the corresponding thermoelectric generator leg shape structure. According to the findings, it has been demonstrated that the inclusion of a variable cross-section can have an impact on the efficiency of a thermoelectric generator. It has been concluded that the Diamond configuration generated a slightly larger voltage difference than the conventional Rectangular geometry. In addition, for two cases, Rectangular and Diamond configurations, the voltage generated by a TEG module consisting of 128 pairs of legs was analysed. As thermal stress analysis is an important factor in the selection of TEG leg geometries, it was observed based on simulations that the newly implemented Diamond-leg geometry encountered lower thermal stresses than the traditional Rectangular model, while the Cone-shape may fail structurally before the other TEG models. The proposed methodology, taking into account the results of the simulation carried out, provides guidance for the development of thermoelectric modules with different forms of variable leg geometry.

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“…Therefore, it is easier to supply IoT devices from generators of this type, but mainly in the case of significant temperature gradient conservation between the outer surfaces of the thermocouple. In order to eliminate this discrepancy and to enhance the energetic efficiency of the TEG thermocouples, which are active at smaller temperature differences, various studies have been conducted on using alternative materials to construct the TEGs thermocouples [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Thermoelectric Generators Used as Energy Harvesters in a Water Consumption Meter Application

et al. 2021

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In this study, we present the results of measuring the performance of selected Peltier cells such as thermoelectric Peltier cooler modules (TEC), thermoelectric micro-Peltier cooler modules (TES), and thermoelectric Seebeck generator modules (TEG). The achieved results are presented in the form of graphs of powering system output voltage or power efficiency functions of the load impedance. Moreover, a technical solution is also presented that consists of designing a water consumption power supply system, using a renewable energy source in the form of a Peltier cell. The developed measuring system does not require additional batteries or an external power source. The energy needed to power the system was obtained from the temperature difference between two sides of a thermoelectric cell, caused by the measured medium which was flowing in a copper water pipe. All achieved results were investigated for the temperature difference from 1 to 10 K in relation to the ambient temperature.

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Thermoelectric generator (TEG) technologies and applications

Cited by 260 publications

References 65 publications

Thermoelectric Power Generators: State-of-the-Art, Heat Recovery Method, and Challenges

Thermoelectric Power Generators: State-of-the-Art, Heat Recovery Method, and Challenges

Investigation and Computational Modelling of Variable TEG Leg Geometries

An Investigation of Thermoelectric Generators Used as Energy Harvesters in a Water Consumption Meter Application

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