A system is defined as a group of units, objects, or items so combined as to form a whole and to operate in unison. In the case of a fuel cell, the system includes all the components needed to operate a fuel cell stack and deliver electrical current. A fuel cell stack is obviously the heart of a fuel cell system; however, without the supporting equipment the stack itself would not be very useful. The fuel cell system typically involves the following subsystems:
• Oxidant supply (oxygen or air)
• Fuel supply (hydrogen or hydrogen rich gas)
• Heat management
• Water management
• Power conditioning
• Instrumentation and controls
Depending on the available or chosen fuel and oxidant, the fuel cell systems may be ...