Engineering development of a coal-fired high performance power generating system
United Technologies Research Center is heading a team of seven research organizations to develop concepts and evaluate designs for a 300 MWe indirect fired combined cycle plant utilizing a 65% coal, 35% natural gas, fuel mix. The optimized design employs both radiative and convective air heaters to transfer the energy from coal combustion to the gas turbine working fluid. Because of present day materials limits, it is necessary to use a natural gas topping cycle to reach the appropriate turbine temperatures required for high efficiency. The following paper describes the preliminary investigations of repowering coal-fired stations using the next generation aeroderivative gas turbine in combined cycle and Humid Air Turbine (HAT) configurations. An 100 MW + industrialized version of the Pratt and Whitney 4000 aero engine is the basis of intercooled gas turbine cycles which use both coal and natural gas to heat the gas turbine combustion air. How the heat from the intercooler and the turbine exhaust is used in repowering depends on the desired steam conditions and power level. steam station sizes from 90 to 200 MW with steam conditions ranging from 1250 psi/950 F non-reheat to 2400 psi/1050 F/1050 F reheat were investigated. Efficiencies in the 42--47% range (HHV) are projected. The cost of electricity is application specific, but should be significantly less than the original station at emission levels which are one-quarter or less than current New Source Performance Standards.
- OSTI ID:
- 549960
- Report Number(s):
- CONF-961006-; ISBN 0-7918-1796-2; TRN: IM9753%%35
- Resource Relation:
- Conference: 1996 international joint power generation conference, Houston, TX (United States), 13-17 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 international joint power generation conference: Proceedings. Volume 2; PWR-Volume 30; Kielasa, L. [ed.] [Detroit Edison Co., MI (United States)]; Weed, G.E. [ed.] [Eastman Kodak Co., Rochester, NY (United States)]; PB: 936 p.
- Country of Publication:
- United States
- Language:
- English
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