Thermoelectric Power Generation in a Vacuum Cell of Decomposing Liquid Potassium-Ammonia Solutions

Kim, Jibeom; Shim, Kyuchol; Jeon, Joonhyeon

doi:10.3390/en6115960

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…However, the thermoelectric energy production from low-and medium-temperature sources is an active research field, in which innovative solutions are studied (see, for example [42]). Figure 1 shows a sketch of the whole device.…”

Section: Introductionmentioning

confidence: 99%

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

et al. 2014

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The conversion of heat into current can be obtained by a process with two stages. In the first one, the heat is used for distilling a solution and obtaining two flows with different concentrations. In the second stage, the two flows are sent to an electrochemical cell that produces current by consuming the concentration difference. In this paper, we propose such an electrochemical cell, working with water solutions of zinc chloride. The cell contains two electrodes, made respectively of zinc and silver covered by silver chloride. The operation of the cell is analogous to that of the capacitive mixing and of the "mixing entropy battery": the electrodes are charged while dipped in the concentrated solution and discharged when dipped in the diluted solution. The cyclic operation allows us to extract a surplus of energy, at the expense of the free energy of the concentration difference. We evaluate the feasibility of such a cell for practical applications and find that a power up to 2 W per m 2 of the surface of the electrodes can be achieved.

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Section: Introductionmentioning

confidence: 99%

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

et al. 2014

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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 properties and thermal stress simulation of pressureless sintered SiC/AlN ceramic composites at high temperatures

Besisa

Ewais

Shalaby

et al. 2018

Solar Energy Materials and Solar Cells

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Thermoelectric Power Generation in a Vacuum Cell of Decomposing Liquid Potassium-Ammonia Solutions

Cited by 3 publications

References 20 publications

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

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

Thermoelectric properties and thermal stress simulation of pressureless sintered SiC/AlN ceramic composites at high temperatures

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