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Extra resources for Fuel Cell Handbook. Hydrogen Power Electricity Electrical Electronics
Sample text
Efficiency will be about 57% (LHV). Operation is expected to begin in mid 2002. Plans are underway for a field test of a megawatt class fuel cell/gas turbine hybrid system on an Environmental Protection Agency site at Ft. Mead, Maryland. This system is expected to exhibit an efficiency of about 60 % (LHV) depending on the turbine and the inverter selected. Operation is expected in the second half of 2002. A 250 kilowatt system is planned for a site in Norway. The system will be operated by Norske Shell to demonstrate that CO2 can be economically recovered.
The main components in a SOFC APU are the fuel cell stack, the fuel processor, and the thermal management system. In addition there are several balance of plant components, which are listed in Figure 5. The relatively simple reformer design is possible because the SOFC stack operates at high temperatures (around 800°C) and is capable of utilizing both carbon monoxide and certain hydrocarbons as fuel. Since both the anode and cathode exhaust at temperatures of 600850°C, high temperature recuperators are required to maintain system efficiency.
All were produced in their Pittsburgh, Pennsylvania facility. The capacities of the systems are 220 kilowatts, 100 kilowatts, and 25 kilowatts. The most recent system is a 220 kilowatt fuel cell/gas turbine power plant operating at the University of California’s National Fuel Cell Research Center located in Irvine, California. 5 atmospheres in combination with a 20 kilowatt two-shaft gas turbine. The system was first run at the Pittsburgh facility and started operating at Irvine in June, 2000. Total run time until July, 2000 was 264 hours.