New high efficiency low capital coal fueled combined cycle using existing CFBs and large gas turbines
Advanced Coal Power Technologies (IGCC, PFBII, and HIPPS) despite over two decades of technical development, have seen a disappointing lack of commercial (unsubsidized) utilization. Pulverized coal (PC) steam cycles still dominate because of the intrinsic high capital cost of advanced coal technologies. Recent studies have shown that partial gasification combined cycles yield higher efficiencies than full gasification IGCC cycles. They also show that atmospheric CFB combustors suffer little or no efficiency penalty versus pressurized combustors (and have substantially lower capital costs) because turbine exhaust heat can be fully recovered as the combustion air supply for atmospheric combustors. One new atmospheric partial gasification combined cycle is particularly promising from both a capital cost and efficiency basis. It integrates existing coal atmospheric CFB boiler technology with conventional simple cycle high temperature gas turbines. The CFB boiler also supplies hot bed material to an inexpensive raw coal devolatilizer riser tube which produces a medium-high BTU turbine fuel gas without the need for an expensive power robbing oxygen plant.
- Research Organization:
- Rohrer Technologies, Inc., York, ME (US)
- OSTI ID:
- 20006842
- Resource Relation:
- Conference: 1999 International Joint Power Generation Conference, Burlingame, CA (US), 07/25/1999--07/28/1999; Other Information: PBD: 1999; Related Information: In: Proceedings of the 1999 international joint power generation conference (FACT-vol. 23). Volume 1: Fuels and combustion technologies; Gas turbines; and Nuclear engineering, by Penfield, S.R. Jr.; Moussa, N.A. [eds.], 651 pages.
- Country of Publication:
- United States
- Language:
- English
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