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Three-dimensional modeling of pressure effect on operating characteristics and performance of solid oxide fuel cell
- Source :
- International Journal of Hydrogen Energy. 43:20059-20076
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- A three-dimensional (3-D) model for planar, anode-supported, solid oxide fuel cell (SOFC) is developed to investigate the effect of operating pressure on cell characteristics. The results show that the elevated operating pressure can improve cell performance by increasing open circuit voltage and reducing activation overpotential, and enhance the electrochemical reaction in the vicinity of electrolyte. Besides, the high pressure can also change the distributions of species and internal reforming reactions. Compared to the case using syngas as fuel, the operating pressure has more significant effects on temperature gradient along flow direction when partly pre-reformed gas is supplied. In addition, efficient control of cell temperature could be achieved by decreasing fuel utilization in the case of partly pre-reformed gas, but this is achieved at the expense of cell efficiency, especially under high pressure condition. Another way to reduce the temperature gradient is to adopt higher air ratio. Moreover, when partly pre-reformed gas is used, the counter-flow configuration has a better performance due to the higher overall temperature.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Open-circuit voltage
05 social sciences
Energy Engineering and Power Technology
02 engineering and technology
Electrolyte
Overpotential
021001 nanoscience & nanotechnology
Condensed Matter Physics
Electrochemistry
Temperature gradient
Fuel Technology
Planar
Chemical engineering
0502 economics and business
Solid oxide fuel cell
050207 economics
0210 nano-technology
Syngas
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........d589b98d604c6a1539cda437b48e3e51