Patent ID: 7943260

Claim:
A system for delivering an input fluid stream through a fuel cell stack to generate electrical current and discharge an unused fluid stream, the system comprising: a fluid supply adapted to produce a supply fluid stream; an ejector configured to receive the supply fluid stream and the unused fluid stream, combine the supply fluid stream and the unused fluid stream to generate the input fluid stream, and control the flow of the input fluid stream to the fuel cell stack; an inlet of the fuel cell stack adapted to receive the input fluid stream, the fuel cell stack being adapted to drive a device with the electrical current; a blower positioned between the ejector and the fuel cell stack and configured to control the flow of the unused fluid stream to the ejector; a bypass valve positioned between the ejector and the fuel cell stack, the bypass valve is configured to control the flow of the unused fluid stream to the blower and to the ejector; an inlet of the bypass valve receives the unused fluid stream from the fuel cell stack; a first outlet of the bypass valve delivers the unused fluid stream to the blower; and a second outlet of the bypass valve delivers the unused fluid stream to the ejector.