Energy Conversion (EC) Systems

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Energy Conversion (EC) Systems Integrated Gasification Combined Cycle Fuel Cell Magnetohydrodynamics The first-generation version of most of these systems is either commercially available or under demonstration today. Descriptions Pressurized Fluidized-Bed Combustion This coal fired combustion system reduces sulfur and nitrogen pollutants inside the boiler, eliminating the need for expensive add-on equipment. The hot, high-pressure gases produced by pressurized fluidized-bed combustors can power a "combined cycle" arrangement of gas and steam turbines. First-generation systems, with 40 to 42 percent efficiencies, are being commercially demonstrated. More advanced concepts are expected to boost efficiencies between 45 percent and 50 percent. These advanced systems will be capable of reducing sulfur dioxide by 95 percent and nitrogen oxides by 85 percent. Indirectly Fired Cycle The combustion gases created by burning coal in this high performance power system are prevented from contacting a gas turbine. Instead, they transfer heat to an impurity free gas that

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