| 摘要 |
In one embodiment, an electrical current generating system consists of a fue l cell, and an oxygen gas delivery system. The fuel cell includes an anode channel having a n anode gas inlet for receiving a supply of hydrogen gas, a cathode channel having a cathode g as inlet and a cathode gas outlet, and an electrolyte in communication with the anode and cathode channel for facilitating ion exchange between the anode and cathode channel. The oxygen gas delivery system is coupled to the cathode gas inlet and delivers oxygen gas to the cathode channel. The electrical current generating system also includes gas recirculation means coupled to the cathode gas outlet for recirculating a portion of cathode exhaust gas exhausted from the cathode gas outlet to the cathode gas inlet. In another embodiment, an electrical curren t generating system consists of a fuel cell, an oxygen gas delivery system, and a hydrogen gas delivery system. The oxygen gas delivery system is coupled to the cathode gas inlet and delivers oxygen gas to the cathode channel. The hydrogen gas delivery system includes a hydrogen gas inlet for receiving a first hydrogen gas feed from the anode gas outlet, and a hydrogen gas outlet coupled to the anode gas inlet for delivering hydrogen gas to the anode channel with increased purity from the first hydrogen gas feed. |
