Thermoelectric generator performance analysis: Influence of pin tapering on the first and second law efficiencies

Yilbaş, Bekir Sami; Ali, Haider

doi:10.1016/j.enconman.2015.05.005

Cited by 38 publications

(14 citation statements)

References 17 publications

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“…Therefore, overall effective Seebeck coefficient (Eqs. (15)e (17)) and effective conductance of the thermoelectric generator change. This modifies the heat transfer characteristics in the thermoelectric generator.…”

Section: Resultsmentioning

confidence: 97%

“…and a n;eff : ¼ a n;1 k n;eff : k n;1 x ln 1 þ xm n À x=2 1 À x=2 þ a n;2 k n;eff : (16) And the overall effective Seebeck Coefficeint of whole thermoelectric power generator can be written as: a eff : ¼ a p;eff : À a n;eff : (17) Eq. (14) becomes:…”

Section: Mathematical Analysismentioning

confidence: 99%

“…Although thermal performance of the segmented thermoelectric electric generators were studied previously [17], the influence of the thermoelectric pin configuration on the thermal performance was left for a future study. Therefore, in the present study, thermal analysis of the segmented thermoelectric generator is introduced and the influence of the pin geometric configuration on the device performance is examined.…”

Section: Introductionmentioning

confidence: 99%

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Segmented thermoelectric generator: Influence of pin shape configuration on the device performance

Ali

Yilbaş

Al‐Sulaiman

2016

Energy

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Section: Resultsmentioning

confidence: 97%

Section: Mathematical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Segmented thermoelectric generator: Influence of pin shape configuration on the device performance

Ali

Yilbaş

Al‐Sulaiman

2016

Energy

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“…They introduced 2 new thermoelectric generators: (1) a compact thermoelectric generator and (2) thermoelectric generator with optimized dimensions. Yilbas et al examined the configuration of pins on the TEG efficiency under different working conditions. It was shown that the pin configuration had a significant effect on the TEG performance.…”

Section: Introductionmentioning

confidence: 99%

A hybrid TEG/wind system using concentrated solar energy and chimney effect

2018

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This paper investigates a novel hybrid system combining thermal electrical generators (TEGs) and a wind turbine. The mathematical model of the system is derived and solved to investigate the performance of the proposed system. In the proposed system, solar energy is converted to heat by an absorber plate. Some portion of this heat is converted to electricity using TEG, while another portion of the heat is used to heat up air flowing in an inclined duct placed underneath the absorber plate. Heating the air inside the system enhances the current speed because of the effect of buoyancy. A wind turbine is placed inside the duct parallel to air flow before it exits to the atmosphere. The wind current is accelerated before passing through the turbine by using venture effect. The TEGs are exposed to the concentrated solar radiation. This can be obtained using a compound parabolic concentrator. The proposed configuration has multiadvantages: (1) the wind is used to drive a wind turbine; (2) air cools the rear surfaces of TEGs to increase the temperature difference between the opposite surfaces, thus generates more electrical power; and (3) it uses buoyancy effect to increase the wind stream speed, thus enhancing the power generated from turbine. It is found that the solar concentration ratio is the most important factor contributing to enhancing the TEG efficiency. The buoyancy effect leads to turbine power boost at high wind speeds more than at low wind speeds.

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“…During the past 20 years, thermoelectric devices were widely used to convert waste-heat energy from power plants and power localized autonomous sensors, to collect waste energy from the exhaust of automotive vehicles, and to cool the electronic devices with high heat flux being used in aerospace systems [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Non-Uniform High Heat Flux on Thermal Stress of Thermoelectric Power Generator

et al. 2015

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Abstract:A thermoelectric generator (TEG) device which uses solar energy as heat source would achieve higher efficiency if there is a higher temperature difference between the hot-cold ends. However, higher temperature or higher heat flux being imposed upon the hot end will cause strong thermal stress, which will have a negative influence on the life cycle of the thermoelectric module. Meanwhile, in order to get high heat flux, a Fresnel lens is required to concentrate solar energy, which will cause non-uniformity of heat flux on the hot end of the TEG and further influence the thermal stress of the device. This phenomenon is very common in solar TEG devices but seldom research work has been reported. In this paper, numerical analysis on the heat transfer and thermal stress performance of a TEG module has been performed considering the variation on the power of the heat flux being imposed upon the hot-end; the influence of non-uniform high heat flux on thermal stress has also been analyzed. It is found that non-uniformity of high heat flux being imposed upon the hot end has a significant effect on the thermal stress of TEG and life expectation of the device. Taking the uniformity of 100% as standard, when the heating uniformity is 70%, 50%, 30%, and 10%, respectively, the maximum thermal stress of TEG module increased by 3%, 6%, 12%, and 22% respectively. If we increase the heat flux on the hot end, the influence of non-uniformity on the thermal stress will be more remarkable.

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Thermoelectric generator performance analysis: Influence of pin tapering on the first and second law efficiencies

Cited by 38 publications

References 17 publications

Segmented thermoelectric generator: Influence of pin shape configuration on the device performance

Segmented thermoelectric generator: Influence of pin shape configuration on the device performance

A hybrid TEG/wind system using concentrated solar energy and chimney effect

The Influence of Non-Uniform High Heat Flux on Thermal Stress of Thermoelectric Power Generator

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