The moisture level in biomass fuels potentially impacts efficiency in conversion to power. This paper examines the efficiency and net power output of a fluidized bed gasifier-combined cycle with flue gas drying for a range of as-received raw biomass moisture contents and levels of pregusification drying. Due to the lack of empirical data available, a modeling approach is used to simulate the effect of varying moisture content in the gasifier feed biomass. For a specified as-received biomass moisture content, drying prior to gasification increases overall efficiency, but the gains in efficiency decrease with increasing levels of drying. For a specified post-dryer gasifier feed moisture content, cycle efficiency and power output increase with decreasing as-received biomass moisture down to 30 percent, below which the change in cycle performance is negligible.

Issue Section:
Gas Turbines: Coal, Biomass, and Alternative Fuels
Topics:
Biomass, Fuels, Integrated gasification combined cycle power stations, Drying, Cycles, Flue gases, Fluidized beds, Fuel gasification, Modeling
1.
Consonni
S.
, and
Larson
E. D.
,
1996
, “
Biomass-Gasifier/Aeroderivative Gas Turbine Combined Cycles, Part A: Technologies and Performance Modeling, and Part B: Performance Calculations and Economic Assessment
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol.
118
, pp.
507
–
525
.
2.
Consonni, S., Lozza, G., Macchi, E., Chiesa, P., and Bombarda, P., 1991, “Gas-Turbine-Based Advanced Cycles for Power Generation. Part A: A Calculation Model,” Proceedings 1991 Yokohama International Gas Turbine Congress, Gas Turbine Society of Japan, Tokyo, pp. 201–210.
3.
Corman, J. C., 1995, “Gas Turbine Power Generation—Status and Environmental Considerations,” Proceedings, 1995 Cogen Turbo Power, ASME, New York, NY.
4.
Gomes, A., Alves, J., and Leite, H., 1996, “Teor de umidade da madeira emfuncao do tempo de secagem,” final report of Wood Drying Tests by COPENER for Companhia Hidro Electrica do Sao Francisco, Recife, Brazil.
5.
Hall, D. O., Rosillo-Calle, F., Williams, R. H., and Woods, J., 1993, “Biomass for Energy: Supply Prospects,” Renewable Energy: Sources for Fuels and Electricity, Johansson, Kelly, Reddy, and Williams, eds., Island Press, Washington D. C., pp. 595–651.
6.
Horlock
J. H.
,
1995
, “
Combined Power Plants—Past, Present, and Future
,”
Transactions of the ASME
, Vol.
117
, pp.
608
–
616
.
7.
Hulkkonen, S., Aijala, M., and Holappa, J., 1993, “Integration of a Fuel Dryer to a Gas Turbine Process,” ASME Cogen Turbo Power Book No. 100348, IGTI-Vol. 8, pp. 61–67.
8.
Hulkkonen, S., Raiko, M., and Ailala, M., 1991,“High Efficiency Power Plant Processes for Moist Fuels,” ASME Cogen-Turbo Book No. 100313, IGTI-Vol. 6, pp. 429–433.
9.
Larson, E. D., and Hughes, W. E. M., 1996, “Performance Modeling of Aeroderivative Steam-Injected Gas Turbines and Combined Cycles Fueled from Fixed or Fluid-Bed Biomass Gasifiers,” Paper No. 96-GT-89, American Society of Mechanical Engineers, New York, NY.
10.
Liu, Y., and Schmidli, J., 1996, “Experiments With a Gas Turbine Model Combustor Firing Blast Furnace Gas,” Paper No. 96-GT-52, American Society of Mechanical Engineers, New York, NY.
11.
Macchi
E.
,
Consonni
S.
,
Lozza
G.
,
Chiesa
P.
,
1995
, “
An Assessment of the Thermodynamic Performance of Mixed Gas-Steam Cycles: Part A—Intercooled and Steam Injected Cycles
,”
ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER
, Vol.
117
, pp.
489
–
498
.
12.
Palmer, C. A., Erbes, M. R., and Pechtl, P. A., 1993, “Performance Prediction of the LM2500 Gas Turbine Using Low Heating Value Fuels,” Proceedings of Cogen-Turbo ’93, ASME, New York, NY.
13.
Rahr, D. W., Sabla, P. E., Vinson, J. W., 1985, “Small Industrial Gas Turbine Combustor Performance With Low BTU Gas Fuels,” Paper No. 85-GT-125, ASME, New York, NY.
14.
Sabla, P. E., and Kutzko, G. G., 1985, “Combustion Characteristics of the GE LM2500 Combustor With Hydrogen-Carbon Monoxide-Based Low BTU Fuels,” Paper No. 85-GT-179, ASME, New York, NY.
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