Steinfeld Et Al

The unreacted H2 and CO flow to an oxidizer which operates at 761°C. The remaining 26% of the methane fuel is compressed and flows to the gas turbine combustor. The gas turbine compressor delivers air at 10 atm to a heat exchanger which heats the air to 589°C. The heated air then flows to the gas turbine combustor where it is heated further to 982°C before flowing through the turbine. Turbine exhaust containing 02 and C02 flows to the anode exhaust oxidizer. Exhaust from the anode exhaust oxidizer heats the compressed air in the heat exchanger before being recycled to the fuel cell cathode. Exhaust from the cathodes at u°""< 670°C flows to the steam bottoming

Figure 2. SYSTEM SCHEMATIC OF HYBRID system. The steam bottoming system POWER CYCLE: includes a Heat Recovery Steam

A Topping Cycle and a Steam Bottoming Cycle Generator (HRSG), steam turbine, condenser and condensate and boiler feed pumps. The steam turbine includes an extraction point for the steam to the fuel cell system. The HRSG includes a reheater for the fuel cell system steam, a superheater, and a boiler. The system also includes a condensate reheater and deaerator, not shown on the simplified schematic. Exhaust leaves the system at 62°C.

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PLANT PERFORMANCE - The performance of the 20 MW plant with a hybrid power cycle was analyzed using CHEMCAD™ system simulation software with an ERC developed fiiel cell model. The results are shown in Table 1. In the hybrid power cycle about 65% of the power is produced by the fuel cell

Table 1. 20MW HYBRID POWER CYCLE PERFORMANCE:

Overall Efficiency is 65%

Table 1. 20MW HYBRID POWER CYCLE PERFORMANCE:

Overall Efficiency is 65%

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