||General Electric Corporate Research and Development, Schenectady, N.Y.;National Aeronautics and Space Administration, Washington, D.C.;Environmental Protection Agency, Washington, D.C.;Tennessee Valley Authority, Chattanooga.;Energy Research and Development Administration, Washington, D.C.
A study was performed to estimate the technical/economic characteristics of a steam power plant (3500 psig, 1000 F/1000 F) with a coal-burning radiant furnace and a wet lime stack gas scrubber to control sulfur emissions. Particulate emissions were controlled by an electrostatic precipitator operating at 300 F. The stack gas from the scrubber was reheated from 125 F to 250 F as a base case, and from 125 F to 175 F as an alternate case. The study was performed on a basis consistent with the General Electric ECAS Phase II evaluation of advanced energy conversion system for electric utility baseload applications using coal or coal-derived fuels. A conceptual design of the power plant was developed, including the on-site calcination of limestone to lime and the provision of sludge ponds to store the products of flue gas scrubbing. From this design, estimates were derived for power plant efficiency, capital cost, environmental intrusion characteristics, natural resource requirements, and cost of electricity at an assumed capacity factor of 65%. An implementation assessment was performed where factors affecting applicability of the conceptual design power plant in electric utility generation systems were appraised. At 250 F and 175 F stack gas temperatures respectively, the plants showed a cost of electricity of 39.8 and 37.0 mills/kWh and overall plant efficiencies of 32% and 34%.