A key to achieving efficient, environmentally acceptable electric power from combustion of low Btu coal gas is through an advanced design, combined gas turbine-steam turbine cycle system, integrated with a low Btu gasifier. A conceptual design of a commercial size plant of this concept is presented. It consists of a modularized system built around commercially available, pressurized fixed-bed gasifiers, hot-fuel gas cleanup and desulfurization, an advanced 3000 F (1649 C) heavy-duty gas turbine, and a conventional steam system. The turbine subsystem, with extensive test background on petroleum fuels, utilizes transpiration-air-cooling to maintain moderate metal temperatures and to protect the components from the aggressive environment. Emphasis in the design of the power plant is placed on earliest possible commercialization.
High Temperature Turbine Technology Program: Phase I. Topical report. Low Btu fuel combined cycle reference design, 750 kW electric power plant with integrated low Btu fuel gas plant