Due to their high efficiency and flexibility, aeroderivative gas turbines were often considered as a development basis for intercooled engines, thus providing better efficiency and larger power output. Those machines, originally studied for natural gas, are here considered as the power section of gasification plants for coal and heavy fuels. This paper investigates the matching between intercooled gas turbine, in complex cycle configurations including combined and HAT cycles, and coal gasification processes based on entrained-bed gasifiers, with syngas cooling accomplished by steam production or by full water-quench. In this frame, a good level of integration can be found (i.e. re-use of intercooler heat, availability of cool, pressurized air for feeding air separation units, etc.) to enhance overall conversion efficiency and to reduce capital cast. Thermodynamic aspects of the proposed systems are investigated, to provide an efficiency assessment, in comparison with mare conventional IGCC plants based on heavy-duty gas turbines. The results outline that elevated conversion efficiencies can be achieved by moderate-size intercooled gas turbines in combined cycle, while the HAT configuration presents critical development problems. On the basis of a preliminary cost assessment, cost of electricity produced is lower than the one obtained by heavy-duty machines of comparable size.
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ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
June 2–5, 1997
Orlando, Florida, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7869-9
PROCEEDINGS PAPER
Intercooled Advanced Gas Turbines in Coal Gasification Plants, With Combined or “HAT” Power Cycle
Paolo Chiesa,
Paolo Chiesa
Politecnico di Milano, Milan, Italy
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Giovanni Lozza
Giovanni Lozza
Politecnico di Milano, Milan, Italy
Search for other works by this author on:
Paolo Chiesa
Politecnico di Milano, Milan, Italy
Giovanni Lozza
Politecnico di Milano, Milan, Italy
Paper No:
97-GT-039, V002T05A006; 13 pages
Published Online:
December 24, 2014
Citation
Chiesa, P, & Lozza, G. "Intercooled Advanced Gas Turbines in Coal Gasification Plants, With Combined or “HAT” Power Cycle." Proceedings of the ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations. Orlando, Florida, USA. June 2–5, 1997. V002T05A006. ASME. https://doi.org/10.1115/97-GT-039
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