Titre du document / Document title

Fuel cell efficiency redefined : Carnot limit reassessed

Auteur(s) / Author(s)

JACOB K. T. ⁽¹⁾ ; JAIN Saurabh ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Metallurgy, Indian Institute of Science, Bangalore 560012, INDE

Résumé / Abstract

There are deficiencies in current definition of thermodynamic efficiency of fuel cells (η^c_th = ΔG/ΔH); efficiency greater than unity is obtained when AS for the cell reaction is positive, and negative efficiency is obtained for endothermic reactions. The origin of the flow is identified. A new definition of thennodynamic efficiency is proposed that overcomes these limitations. Consequences of the new definition are examined. Against the conventional view that fuel cells are not Carnot limited, several recent articles have argued that the second law of thermodynamics restricts fuel cell energy conversion in the same way as heat engines. This controversy is critically examined. A resolution is achieved in part from an understanding of the contextual assumptions in the different approaches and in part from identifying some conceptual limitations.

Revue / Journal Title

Proceedings - Electrochemical Society    ISSN  0161-6374 

Source / Source

Congrès
SOFC-IX : solid oxide fuel cells IX :   ( Volume 1, Cells, stacks, and systems. Volume 2, Materials : Quebec PQ, 15-20 May 2005 )
International symposium on solid oxide fuel cells N^o9, Quebec PQ , CANADA (15/05/2005)
2005  , vol. 7 (2)[Note(s) : XXIX, 1992 p., ] (10 ref.) ISBN 1-56677-465-9 ;  Illustration : Illustration ;

Langue / Language

Anglais

Editeur / Publisher

Electrochemical Society, Pennington, NJ, ETATS-UNIS  (19?) (Revue)
Electrochemical Society, Pennington NJ, ETATS-UNIS  (2005) (Monographie)

Mots-clés anglais / English Keywords

Energy conversion

;

Second law of thermodynamics

;

Performance

;

Solid oxide fuel cell

;

Mots-clés français / French Keywords

Conversion énergie

;

Deuxième principe thermodynamique

;

Performance

;

Pile combustible oxyde solide

;

Mots-clés espagnols / Spanish Keywords

Conversión energética

;

Segundo principio termodinámica

;

Rendimiento

;

Pila combustible oxido sólido

;

Localisation / Location

INIST-CNRS, Cote INIST : 22195, 35400012441979.0730