Tuesday, April 1, 2008 - 10:50 AM
The effect of higher operating voltages on hydrogen production in solid oxide electrolysis system
The necessity for highly efficient production of hydrogen is increasing as the hydrogen economy emerges as a promising answer for tomorrow's energy woes. Hydrogen production through high temperature solid oxide electrolysis is more efficient compared to other electrolysis processes. The most important parameter that affects the operation of solid oxide electrolysis cell is the operating voltage. This paper investigates the effects of operation of solid oxide electrolysis cell at high operating voltages. At higher operating voltages, especially above thermoneutral voltage, heat generated because of exothermic reaction can be used to achieve a high operating temperature as opposed to using other sources of heat. This can significantly increase the efficiency of hydrogen production. Both hydrogen production and the associated operational costs are also expected to be comparatively high in these conditions. A mathematical model is created to predict the effects of high operating voltages on SOEC parameters and to identify the optimum operating voltage for a given set of operating conditions.
Manuscript
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Back to The NHA Annual Hydrogen Conference 2008 (March 31-April 4 2008)
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Back to The NHA Annual Hydrogen Conference 2008 (March 31-April 4 2008)