Parametric study on the thermoelectric conversion performance of a concentrated solar-driven thermionic-thermoelectric hybrid generator

Xiao, Lan; Wu, Shuang–Ying; Yang, Shiling

doi:10.1002/er.3849

Cited by 28 publications

(12 citation statements)

References 29 publications

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“…The disadvantages of the radiator are large thermal resistance, low convective heat transfer coefficient on the surface and high temperature at the hot end, which leads to low cooling efficiency [109]. The finned heat sink is widely used in many fields [111,112], such as the studied waste heat recovery of the solar system using TE modules. The finned heat sink is used for cooling the cold side of TE modules by natural convection air.…”

Section: Finned Heat Sinkmentioning

confidence: 99%

“…Considering the cost and specific heat, water is the most used fluid. This type of heat exchanger is more effective and has a lower thermal resistance (example thermal resistance of 0.108 K/W [125]) The finned heat sink is widely used in many fields [111,112], such as the studied waste heat recovery of the solar system using TE modules. The finned heat sink is used for cooling the cold side of TE modules by natural convection air.…”

Section: Fluid-airmentioning

confidence: 99%

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A Comprehensive Review of Strategies and Approaches for Enhancing the Performance of Thermoelectric Module

Song

Qian

et al. 2020

Energies

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In recent years, thermoelectric (TE) technology has been emerging as a promising alternative and environmentally friendly technology for power generators or cooling devices due to the increasingly serious energy shortage and environmental pollution problems. However, although TE technology has been found for a long time and applied in many professional fields, its low energy conversion efficiency and high cost also hinder its wide application. Thus, it is still urgent to improve the thermoelectric modules. This work comprehensively reviews the status of strategies and approaches for enhancing the performance of thermoelectrics, including material development, structure and geometry improvement, the optimization of a thermal management system, and the thermal structure design. In particular, the influence of contact thermal resistance and the improved optimization methods are discussed. This work covers many fields related to the enhancement of thermoelectrics. It is found that the main challenge of TE technology remains the improvement of materials’ properties, the decrease in costs and commercialization. Therefore, a lot of research needs to be carried out to overcome this challenge and further improve the performance of TE modules. Finally, the future research direction of TE technology is discussed. These discussions provide some practical guidance for the improvement of thermoelectric performance and the promotion of thermoelectric applications.

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Section: Finned Heat Sinkmentioning

confidence: 99%

Section: Fluid-airmentioning

confidence: 99%

A Comprehensive Review of Strategies and Approaches for Enhancing the Performance of Thermoelectric Module

Song

Qian

et al. 2020

Energies

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“…The heat sink covering on the cold side of TEG subsystem is considered as the same area as the TEG subsystem. Generally speaking, the heat flow ( Q L) released into the surroundings is assumed to obey Newton's law, namely

Q_{L} = {UF}_{3} ((), T_{6} - T_{0})

…”

Section: The Description Of the Concentrated Solar‐driven Tic/amtec/tmentioning

confidence: 99%

Conceptual design and performance analysis of concentrated solar-driven TIC/AMTEC/TEG hybrid system

Zhang

Xiao

2018

Int J Energy Res

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Summary Three kinds of static thermal to electrical conversion devices thermionic converter (TIC), alkali metal thermal electric converter (AMTEC), and thermoelectric generator (TEG) are incorporated into a novel thermoelectric hybrid system‐TIC/AMTEC/TEG hybrid system, driven by concentrated solar. To evaluate the performance of concentrated solar‐driven TIC/AMTEC/TEG hybrid system accurately, a comprehensive theoretical model based on the first law of thermodynamics has been established for the first time. The effects of load parameters (voltage output of TIC subsystem V1, electrode current density of AMTEC subsystem J2, dimensionless current of TEG subsystem i) and dimensionless geometric parameters (the ratio of total electrode area of AMTEC subsystem to emitter area of TIC subsystem r, the ratio of TEG subsystem area to total electrode area of AMTEC subsystem c) on the conversion efficiency of TIC/AMTEC/TEG hybrid system (ηALL) were discussed. Furthermore, in order to demonstrate the contribution of the hybrid system, the comparisons with two‐stage hybrid systems and subsystems were explored. The results show that both V1 and i make a positive effect on ηALL; however, V1 is of greater importance for ηALL. ηALL increases first and then decreases under the influence of J2 and r. Smaller c can sometimes achieve better ηALL. The comparison results reveal that the TIC/AMTEC/TEG hybrid system is outstanding in most cases.

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“…These include segmented thermoelements' geometrical configurations and investigations on maximum power and efficiency deliverances . There are also alternative studies on thermionic and thermoelectric hybrid generators, alkali‐metal thermoelectric converters, and thermoelectric coolers . However, to date, there are no studies or systematic reviews presented on the emerging progresses as well as the perceptions of past and present growing research trends of thermoelectric generators over the last years.…”

Section: Introductionmentioning

confidence: 99%

Methodological reviews and analyses on the emerging research trends and progresses of thermoelectric generators

2018

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Summary Thermoelectric generator is among the earliest initiated electricity‐harvesting methods. It is a very potential power harvester that can convert wasteful thermal energy into electricity. However, it often suffers from low energy conversion rate due to its inconsistent heat source, inefficient thermoelectric material (or thermoelement) performance, and incompetent structural issues. Progressively for the first time, detailed methodological surveys and analyses are made for bulk, thick, and thin films in this review. This is in order to accommodate better insights and comprehensions on the emerging trends and progresses of thermoelectric generators from 1989 to 2017. The research interests in thermoelectric generators have started back in 1989, and have continuously experienced emerging progresses in the number of studies over the last years. The methodological reviews and analyses of thermoelectric generator showed that almost 46.6% of bulk and 46.1% of thick and thin film research works, respectively, are actively progressed in 2014 to 2017. Nearly 86.2% of bulk and 44.1% of thick and thin film thermoelectric generators are realizing in between 0.001 and 4 μW cm−2 K−2, while 43.1% of thick and thin films are earning among 10−6 to 0.001 μW cm−2 K−2. The highest achievement made until now is 2.5 W cm−2 at a temperature difference of 140 K and thermoelectric efficiency factor of 127.55 μW cm−2 K−2. This achievement remarked positive elevation for the field and interest in thermoelectric power generation. Consecutively, the research trends of fundamental devices' structure, thermoelement, fabrication, substrate, and heat source characteristics are analyzed too, along with the desired improvement highlights for the applications of thermoelectric generators.

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Parametric study on the thermoelectric conversion performance of a concentrated solar-driven thermionic-thermoelectric hybrid generator

Cited by 28 publications

References 29 publications

A Comprehensive Review of Strategies and Approaches for Enhancing the Performance of Thermoelectric Module

A Comprehensive Review of Strategies and Approaches for Enhancing the Performance of Thermoelectric Module

Conceptual design and performance analysis of concentrated solar-driven TIC/AMTEC/TEG hybrid system

Methodological reviews and analyses on the emerging research trends and progresses of thermoelectric generators

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