Large limits of electrical efficiency in hydrocarbon fueled SOFCs
| Autor: | W. Grover Coors, Roderick W. Sidwell |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Plug flow
Waste management Renewable Energy Sustainability and the Environment Thermodynamic equilibrium Chemistry Energy Engineering and Power Technology Electrolyte Steam reforming Chemical engineering Solid oxide fuel cell Partial oxidation Electrical and Electronic Engineering Physical and Theoretical Chemistry Electrical efficiency Syngas |
| Zdroj: | Journal of Power Sources. 143:166-172 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2004.12.004 |
| Popis: | This paper develops a model for the study of solid oxide fuel cell (SOFC) electrical efficiency. The chemically reacting flow model considers the coupled behavior of fluid mechanics, thermodynamic equilibrium, and transport of electroactive species through the electrolyte. Fuel cells are treated as plug flow tubular reactors with no upstream diffusion. Minimization of free energy is used to calculate gas composition along the length of the fuel channel without specifying a set of reactions. The model serves to place an upper bound on electrical efficiencies. The usefulness of the model is demonstrated by simulating SOFC electrical efficiency as a function of operating voltage for in situ reforming of four different fuel mixtures, including steam reforming and partial oxidation of CH 4 , syngas, and pure CH 4 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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