Coal-fired gas turbine power cycles with steam injection
Abstract
Two proposed coal-fired gas turbine power cycles using steam injection have been studied via a parametric cycle analysis. The steam-injected cycles are configured to achieve the following: direct and environmentally acceptable use of coal as a fuel; no contact between hostile combustion products and the turbine expander; high efficiency without need for a bottoming cycle; and modest operating temperatures compatible with current gas turbine technology. The parametric analysis considers a typical range for pressure ratio (8, 12, 16), turbine inlet temperature (1500, 1750, 2000 F), steam injection rate, and turbine blade cooling flows, and shows the steam-injected cycles to be a significant improvement over the baseline configuration: a small (50 MW) conventional steam plant using fluidized bed combustion and wet cooling towers. The water use benefits and associated water treatment costs for the steam-injected cycles are also examined.
- Publication:
-
13th Intersociety Energy Conversion Engineering Conference
- Pub Date:
- 1978
- Bibcode:
- 1978iece.conf..300F
- Keywords:
-
- Coal Utilization;
- Gas Turbines;
- Power Efficiency;
- Steam Turbines;
- Thermodynamic Cycles;
- Combustion Chambers;
- Cost Analysis;
- Liquid Cooling;
- Systems Analysis;
- Thrust Augmentation;
- Working Fluids;
- Thermodynamics and Statistical Physics