Fundamental Study on the Electrodes for Alkali Metal Thermoelectric Converter (3rd Report, the Performance of Current Collection Structure with Porous Metal)

Kotaro Tanaka, Akira Negishi, Toshihisa Masuda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The alkali metal thermoelectric converter (AMTEC) is an efficient device for the direct conversion of heat to electricity. A new method to supply thermal energy to beta”-alumina solid electrolyte (BASE) tubes is proposed in this paper. Porous metal inserted between a high-temperature thermal source and the BASE tubes not only collects current generated from electrodes but also enhances the heat transfer. An experimental study has been conducted on the disturbance of vapor flow through the porous metal. Its effect on the AMTEC performance has been examined. The calculated results indicate that the sodium vapor flow resistance converted into temperatre difference is in the range from 20 K to 50 K and the expected increase of power density with porous metal current collection structure is ~50%. The influence of potential drop along the electrode is also discussed.

Original languageEnglish
Pages (from-to)1240-1245
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume58
Issue number548
DOIs
Publication statusPublished - 1992
Externally publishedYes

Fingerprint

Alkali metals
alkali metals
converters
Solid electrolytes
solid electrolytes
Electrodes
electrodes
Alumina
aluminum oxides
Metals
Vapors
metals
tubes
sodium vapor
flow resistance
electricity
Thermal energy
thermal energy
radiant flux density
disturbances

Keywords

  • Direct Energy Conversion
  • Energy Conversion
  • Heat Transfer Enhancement
  • Porous Media
  • Solid Electrolyte
  • Thermal Efficiency

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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abstract = "The alkali metal thermoelectric converter (AMTEC) is an efficient device for the direct conversion of heat to electricity. A new method to supply thermal energy to beta”-alumina solid electrolyte (BASE) tubes is proposed in this paper. Porous metal inserted between a high-temperature thermal source and the BASE tubes not only collects current generated from electrodes but also enhances the heat transfer. An experimental study has been conducted on the disturbance of vapor flow through the porous metal. Its effect on the AMTEC performance has been examined. The calculated results indicate that the sodium vapor flow resistance converted into temperatre difference is in the range from 20 K to 50 K and the expected increase of power density with porous metal current collection structure is ~50{\%}. The influence of potential drop along the electrode is also discussed.",
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AB - The alkali metal thermoelectric converter (AMTEC) is an efficient device for the direct conversion of heat to electricity. A new method to supply thermal energy to beta”-alumina solid electrolyte (BASE) tubes is proposed in this paper. Porous metal inserted between a high-temperature thermal source and the BASE tubes not only collects current generated from electrodes but also enhances the heat transfer. An experimental study has been conducted on the disturbance of vapor flow through the porous metal. Its effect on the AMTEC performance has been examined. The calculated results indicate that the sodium vapor flow resistance converted into temperatre difference is in the range from 20 K to 50 K and the expected increase of power density with porous metal current collection structure is ~50%. The influence of potential drop along the electrode is also discussed.

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