A novel class of power plants for clean conversion of coal into power has been recently proposed, based on the concept of partial coal gasification and fluidized-bed combustion of unconverted char from gasification. This paper focuses on the thermodynamic aspects of these plants, in comparison with full gasification cycles, assessing their performance on the basis of a common advanced power plant technology level. Several plant configurations are considered, including pressurized or atmospheric fluidized-bed, air- or steam-cooled, with different carbon conversion in the gasifier. The calculation method, used for reproducing plant energy balances and for performance prediction, is described in the paper. A complete second-law analysis is carried out, pointing out the efficiency loss breakdown for both technologies. Results show that partial gasification plants can achieve efficiencies consistently higher than IGCC, depending on plant configuration and carbon conversion, making this solution a viable and attractive option for efficient coal utilization.
Issue Section:
Gas Turbines: Coal, Biomass, and Alternative Fuels
1.
Bohn, G. H., et al., 1993, “Optimizing a PFBC Combined Cycle With Gas Turbine Topping Cycle,” ASME Paper No. 93-GT-390.
2.
Chiesa, P., Consonni, S., Lozza, G., and Macchi, E., 1993, “Predicting the Ultimate Performance of Advanced Power Cycles Based on Very High Temperature Gas Turbine Engines,” ASME Paper No. 93-GT-223.
3.
Consonni, S., 1992, “Performance Prediction of Gas/Steam Cycles for Power Generation,” MAE Dept. Ph.D. Thesis No. 1893-T, Princeton University, Princeton, NJ.
4.
Consonni, S., et al., 1991, “Gas-Turbine-Based Advanced Cycles for Power Generation. Part A: Calculation Model,” Proc. 1991 Yokohama Int’l Gas Turbine Congress, pp. III-201–210.
5.
Dawkins, R. P., et al., 1985, “Cost and Performance of Kellogg Rust Westinghouse-Based Gasification Combined Cycle Plants,” Final Report EPRI AP-4018, Project 2029-4, Electric Power Research Institute, Palo Alto, CA.
6.
delaMora, J. A., et al., 1985, “Evaluation of the British Gas Corporation/Lurgi Slagging Gasifier in Gasification-Combined-Cycle Power Generation,” Final report EPRI AP-3980, Electric Power Research Institute, Palo Alto, CA.
7.
Foster-Pegg, R. W., and Fraas, A. P., 1993, “A Coal Fired Combined Cycle With High Efficiency,” Proc. 7th ASME Cogen Turbo Power, ASME IGTI-Vol. 8, pp. 119–126.
8.
Klosek, J., Sorenson, J. C., and Wong, M., 1993, “Air vs Oxygen for Gasification Combined Cycle Power,” in: Buggenum IGCC Demonstration Plant, VGB Lecture TB216, edited by VGB, Essen, Germany.
9.
Lozza, G., 1990, “Bottoming Steam Cycles for Combined Gas-Steam Power Plants: a Theoretical Estimation of Steam Turbine Performance and Cycle Analysis,” Proc. 4th ASME Cogen-Turbo, pp. 83–92.
10.
Lozza, G., 1993, “Steam Cycles for Large-Size High-Gas-Temperature Combined Cycles,” Proc. 7th ASME Cogen-Turbo Power, pp. 435–444.
11.
Lozza, G., Chiesa, P., and Consonni, S., 1993, “Theoretical Modelization of Integrated Coal Gasification Combined Cycles,” Proc. of the VII National Congress Combined Cycles: Technical and Economic Perspectives, pp. 287–312 [in Italian].
12.
Macchi, E., et al., 1991, “Gas-Turbine-Based Advanced Cycles for Power Generation. Part A: Calculation Model; Part B: Performance Analysis of Selected Configurations,” Proc. 1991 Yokohama International Gas Turbine Congress, pp. III-201–219.
13.
Macchi
E.
1994
, “An Assessment of the Thermodynamic Performance of Mixed Gas-Steam Cycles. Part A: Intercooled and Steam-Injected Cycles; Part B: Water-Injected and HAT Cycles
,” ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol. 117
, pp. 489
–508
.14.
Matchak, T. A., et al., 1984, “Cost and Performance for Commercial Applications of Texaco-Based Gasification-Combined-Cycle Plants,” Final report EPRI AP-3486, Electric Power Research Institute, Palo Alto, CA.
15.
Maude, C., 1993, “Advanced Power Generation—A Comparative Study of Design Options for Coal,” published by IEA Coal Research, IEACR/55, London, United Kingdom.
16.
Minchener, A. J., et al., 1993, “Development of the CRE Gasifier for Use in Integrated Partial Gasification Combined Cycle Systems,” Proc. of the Twelfth EPRI Conference on Gasification Power Plants, San Francisco, CA.
17.
Moore, T., 1993, “Brighter Future for PFBC,” EPRI Journal, Dec.
18.
Newby
R. A.
Bannister
R. L.
1994
, “Advanced Hot Gas Cleaning System for Coal Gasification Processes
,” ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol. 116
, pp. 338
–344
.19.
Oganowski, G., 1987, “LM5000 and LM2500 Steam Injection Gas Turbines,” Proc. 2nd Tokyo Int’l Gas Turbine Congress, pp. III-393–397.
20.
Rao, A. D., et al., 1993, “HP Integrated vs. Non-integrated ASU in Destec IGCC,” Proc. of the Twelfth EPRI Conference on Gasification Power Plants, San Francisco, CA.
21.
Reynolds, W. C., 1986, “The Element Potential Method for Chemical Equilibrium Analysis: Implementation in the Interactive Program STANJAN—version 3,” Dept. of Mech. Eng., Stanford University, Stanford, CA.
22.
Robertson, A., et al., 1993, “The Advanced PFB Process: Pilot Plant Results and Design Studies,” Proc. of the Twelfth EPRI Conference on Gasification Power Plants, San Francisco, CA.
23.
Robertson
A.
Bonk
D.
1994
, “Effect of Pressure on Second-Generation Pressurized Fluidized Bed Combustion Plants
,” ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol. 116
, pp. 345
–351
.24.
Soothill, C., and Brown, D., 1993, “The Department of Trade and Industry’s Topping Cycle Working Party—Final Report,” Contractor Report No. Coal R011 to the British Dept. of Trade and Industry.
25.
Webb, H. A., Parsons, E. l., and Bajura, R. A., 1993, “Advanced Turbine Systems Program and Coal Application,” ASME Paper No. 93-GT-356.
This content is only available via PDF.
Copyright © 1996
by The American Society of Mechanical Engineers
You do not currently have access to this content.
