Experimental evaluation on electrode conversion efficiency of alkali metal thermal to electric converter

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1 Citation (Scopus)

Abstract

The alkali metal thermal to electric converter (AMTEC) system which utlizes the sodium ion conductivity of beta"-alumina solid electrolyte (BASE) is expected to have high conversion efficiency above 30% including practical heat loss. However, the achieved experimental efficiency- have been around 15%. In this paper, current-voltage characteristics and heat and mass transfer processes on a single cell have been examined experimentally and thermal electrode conversion efficiency has been discussed. Measured electrode conversion efficiency without thermal losses showed that it was about 40% at a power density of 0.3 W/cm2 A theoretical analysis on the thermal losses has also been conducted and these losses are estimated 0.3 W/cm2 in a practical tube type cell, so it is obtained that the actual cell system efficiency of 30% will be expected.

Original languageEnglish
Pages (from-to)301
Number of pages1
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume65
Issue number629
Publication statusPublished - 1999
Externally publishedYes

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Electric converters
Alkali metals
alkali metals
Conversion efficiency
converters
Electrodes
electrodes
evaluation
cells
thermodynamic efficiency
Solid electrolytes
solid electrolytes
Current voltage characteristics
Heat losses
mass transfer
radiant flux density
Alumina
Mass transfer
aluminum oxides
heat transfer

Keywords

  • Direct energy conversion
  • Energy conversion
  • Heat transfer
  • Solid electrolyte
  • Thermal efficiency
  • Thermoelectric conversion

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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title = "Experimental evaluation on electrode conversion efficiency of alkali metal thermal to electric converter",
abstract = "The alkali metal thermal to electric converter (AMTEC) system which utlizes the sodium ion conductivity of beta{"}-alumina solid electrolyte (BASE) is expected to have high conversion efficiency above 30{\%} including practical heat loss. However, the achieved experimental efficiency- have been around 15{\%}. In this paper, current-voltage characteristics and heat and mass transfer processes on a single cell have been examined experimentally and thermal electrode conversion efficiency has been discussed. Measured electrode conversion efficiency without thermal losses showed that it was about 40{\%} at a power density of 0.3 W/cm2 A theoretical analysis on the thermal losses has also been conducted and these losses are estimated 0.3 W/cm2 in a practical tube type cell, so it is obtained that the actual cell system efficiency of 30{\%} will be expected.",
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author = "Kotaro Tanaka",
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journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
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AU - Tanaka, Kotaro

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N2 - The alkali metal thermal to electric converter (AMTEC) system which utlizes the sodium ion conductivity of beta"-alumina solid electrolyte (BASE) is expected to have high conversion efficiency above 30% including practical heat loss. However, the achieved experimental efficiency- have been around 15%. In this paper, current-voltage characteristics and heat and mass transfer processes on a single cell have been examined experimentally and thermal electrode conversion efficiency has been discussed. Measured electrode conversion efficiency without thermal losses showed that it was about 40% at a power density of 0.3 W/cm2 A theoretical analysis on the thermal losses has also been conducted and these losses are estimated 0.3 W/cm2 in a practical tube type cell, so it is obtained that the actual cell system efficiency of 30% will be expected.

AB - The alkali metal thermal to electric converter (AMTEC) system which utlizes the sodium ion conductivity of beta"-alumina solid electrolyte (BASE) is expected to have high conversion efficiency above 30% including practical heat loss. However, the achieved experimental efficiency- have been around 15%. In this paper, current-voltage characteristics and heat and mass transfer processes on a single cell have been examined experimentally and thermal electrode conversion efficiency has been discussed. Measured electrode conversion efficiency without thermal losses showed that it was about 40% at a power density of 0.3 W/cm2 A theoretical analysis on the thermal losses has also been conducted and these losses are estimated 0.3 W/cm2 in a practical tube type cell, so it is obtained that the actual cell system efficiency of 30% will be expected.

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KW - Energy conversion

KW - Heat transfer

KW - Solid electrolyte

KW - Thermal efficiency

KW - Thermoelectric conversion

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