Step response analysis of phosphoric acid fuel cell (PAFC) cathode through a transient model
| Autor: | J. Rangarajan, Raghunathan Rengaswamy, Suman Roy Choudhury, Suhasini Roy Choudhury |
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| Rok vydání: | 2005 |
| Předmět: |
Tafel equation
Transient state Steady state Renewable Energy Sustainability and the Environment Chemistry Analytical chemistry Energy Engineering and Power Technology Cathode law.invention chemistry.chemical_compound Chemical engineering law Transient (oscillation) Transient response Electrical and Electronic Engineering Physical and Theoretical Chemistry Diffusion (business) Phosphoric acid |
| Zdroj: | Journal of Power Sources. 140:274-279 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2004.07.035 |
| Popis: | Transient state response analysis of phosphoric acid fuel cell (PAFC) cathode is important to understand various competitive processes like diffusion, reaction and product back diffusion occurring at various layers of the composite cathode. A two-dimensional unsteady state model for simulating PAFC cathode is developed as an extension of the previously developed steady-state model [S. Roy Choudhury, M.B. Deshmukh, R. Rengaswamy, A two-dimensional steady-state model for phosphoric acid fuel cells (PAFC), J. Power sources 112 (2002) 137–152]. The transient model is solved to study the impact of various parameters such as Tafel slope, diffusivity etc on the step response of the fuel cell. The effect of partial pressure variation in bulk gas for large sized PAFC cathode is also analysed. Trend analysis based on the model output is also experimentally verified using a small unit cell setup. The effect of various parameters on the settling time of the cathode, as revealed in this study, suggests possible development of a diagnostic tool employing such transient model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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