Abstract: A system and method are disclosed for high temperature protection of combustor and other components by controlling the temperature of combustion chamber gases in a fuel cell system tail gas burner using a nozzle or plurality of nozzles to inject water or water vapor upstream, downstream or directly into the combustion chamber. A variable speed pump, actuated valve or other flow metering device regulates the supply of water or water vapor to the nozzles. For the case of water vapor, an evaporator is required between the pump and nozzles. Flow regulation is effected by a control algorithm that reacts to combustor temperature, changes in the power production of the fuel cell system and/or other related system parameters.

Abstract: A hybrid fuel cell-gas turbine system and method efficiently generates power using a combination of separate power generating components. The system includes a turbine system having an air compressor and a turbine, and a fuel cell. By-product waste heat from the fuel cell is used within the fuel cell to heat the cathode air.

Abstract: An electric power generation system is provided which comprises (i) a reactor means, such as a CPOX or steam reformer reactor, for converting a hydrocarbon fuel (e.g., a logistic fuel, natural gas, etc.) at least partially into a syngas comprising hydrogen gas; (ii) a turbocharger comprising a compressor for compressing an oxygen-containing gas and which is mechanically coupled to a turbine; and (iii) a fuel cell subsystem, such as a SOFC, for reacting the syngas and the oxygen at an elevated pressure to produce electric power and an exhaust gas, wherein the exhaust gas flows through the turbine of the turbocharger, driving the compressor.

Abstract: A fuel cell system comprises a compressor and a fuel processor downstream of the compressor. A fuel cell stack is in communication with the fuel processor and compressor. A combustor is downstream of the fuel cell stack. First and second turbines are downstream of the fuel processor and in parallel flow communication with one another. A distribution valve is in communication with the first and second turbines. The first and second turbines are mechanically engaged to the compressor. A bypass valve is intermediate the compressor and the second turbine, with the bypass valve enabling a compressed gas from the compressor to bypass the fuel processor.