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.
|ジャーナル||Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|出版ステータス||Published - 1999|
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering