Optimization of the TIEC/AMTEC cascade cell for high efficiency

M. A.K. Lodhi; V. R. Malka

doi:10.1016/j.jpowsour.2005.05.090

Optimization of the TIEC/AMTEC cascade cell for high efficiency

M. A.K. Lodhi, V. R. Malka

Physics

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A mathematical modeling of a system consisting of a cascade of a thermionic energy conversion (TIEC) device and an alkali metal thermal to electric converter (AMTEC) device has been performed to optimize the efficiency of the cell. The TIEC is heated by electronic bombardment, which converts heat partially into electricity and rejects the remaining heat. The AMTEC utilizes the rejected heat of the TIEC. Cascading these two cells provides lots of advantages. A mathematical model for the cascade converter has been developed to analyze the effects of key parameters such as power level, heat fluxes and temperatures. In this effort, a 12-node system of non-linear simultaneous equations has been constructed which is solved by MATCAD and a locally optimized efficiency has been derived. Thus, efficiency of the cascaded cell is improved, so that it is greater than the highest efficiency among the TIEC and AMTEC and lower than the sum of their individual efficiencies.

Original language	English
Pages (from-to)	685-691
Number of pages	7
Journal	Journal of Power Sources
Volume	156
Issue number	2
DOIs	https://doi.org/10.1016/j.jpowsour.2005.05.090
State	Published - Jun 1 2006

Keywords

AMTEC
Cascade
Efficiency
Optimization
TIEC

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10.1016/j.jpowsour.2005.05.090

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title = "Optimization of the TIEC/AMTEC cascade cell for high efficiency",

abstract = "A mathematical modeling of a system consisting of a cascade of a thermionic energy conversion (TIEC) device and an alkali metal thermal to electric converter (AMTEC) device has been performed to optimize the efficiency of the cell. The TIEC is heated by electronic bombardment, which converts heat partially into electricity and rejects the remaining heat. The AMTEC utilizes the rejected heat of the TIEC. Cascading these two cells provides lots of advantages. A mathematical model for the cascade converter has been developed to analyze the effects of key parameters such as power level, heat fluxes and temperatures. In this effort, a 12-node system of non-linear simultaneous equations has been constructed which is solved by MATCAD and a locally optimized efficiency has been derived. Thus, efficiency of the cascaded cell is improved, so that it is greater than the highest efficiency among the TIEC and AMTEC and lower than the sum of their individual efficiencies.",

keywords = "AMTEC, Cascade, Efficiency, Optimization, TIEC",

author = "Lodhi, {M. A.K.} and Malka, {V. R.}",

note = "Funding Information: This work was supported in part by the Texas Higher Education Coordinating Board Grant No. 003644-091. ",

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AU - Lodhi, M. A.K.

AU - Malka, V. R.

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AB - A mathematical modeling of a system consisting of a cascade of a thermionic energy conversion (TIEC) device and an alkali metal thermal to electric converter (AMTEC) device has been performed to optimize the efficiency of the cell. The TIEC is heated by electronic bombardment, which converts heat partially into electricity and rejects the remaining heat. The AMTEC utilizes the rejected heat of the TIEC. Cascading these two cells provides lots of advantages. A mathematical model for the cascade converter has been developed to analyze the effects of key parameters such as power level, heat fluxes and temperatures. In this effort, a 12-node system of non-linear simultaneous equations has been constructed which is solved by MATCAD and a locally optimized efficiency has been derived. Thus, efficiency of the cascaded cell is improved, so that it is greater than the highest efficiency among the TIEC and AMTEC and lower than the sum of their individual efficiencies.

KW - AMTEC

KW - Cascade

KW - Efficiency

KW - Optimization

KW - TIEC

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JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 2

ER -

Optimization of the TIEC/AMTEC cascade cell for high efficiency

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Keywords

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