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

Kotaro Tanaka

doi:10.1299/kikaib.65.301

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

Kotaro Tanaka

Research output: Contribution to journal › Article

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 language	English
Number of pages	1
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	65
Issue number	629
DOIs	https://doi.org/10.1299/kikaib.65.301
Publication status	Published - 1999 Jan 1

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Keywords

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

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

Cite this

Tanaka, K. (1999). Experimental evaluation on electrode conversion efficiency of alkali metal thermal to electric converter. Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, 65(629). https://doi.org/10.1299/kikaib.65.301

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Access to Document

10.1299/kikaib.65.301