| 摘要 |
<p>A keep-warm system for a fuel cell power plant (10), typically of the proton exchange membrane (PEM) type. The keep-warm system prevents freeze-sensitive portions of the power plant, such as the cell stack assembly (CSA) (12) and the water management system (28, 30), from freezing under extreme cold external temperatures, during extended periods of 7 days or more. The system uses pre-stored and pressurized fuel, typically hydrogen (25), as fuel for a catalytic oxidation reaction at a catalytic burner (66). The hydrogen or other suitable fuel is catalytically reacted with an oxidant, such as air, to produce heated gas that convectively passes in heat exchange relation with the freeze sensitive portions (12, 28, 30) of the power plant (10).</p> |
