AHAT (Advanced Humid Air Turbine System)
The AHAT cycle has thermal efficiency as high as combined cycle, even though it has no steam turbine.
Schematic diagram of AHAT system
Thermal efficiency of AHAT system
Features
- Water atomization cooling system
- Compression work reduction
- Regeneration & Humidification
- Output and efficiency increase
- Humid air combustion with the cluster nozzle burner
- Low NOx emission
- Water recovery system
- Water recycling operation
4MW class AHAT pilot plant
150kW MHAT (Micro humid air turbine System)
Single Crystal Gas Turbine Brade
Nickel based single crystal super alloy developed with the aid of the d-electrons concept has excellent features.
- Creep strength: Temperature capability is 30K-40K higher than that of the 2nd generation superalloy
- Stable microstructure without TCP phases
- Single Crystal castability: Higher Ta and lower Re contents result in an excellent castability
- Excellent fatigue strength similar to the 2nd generation
- Oxidation resistance is superior to the 3rd generation super alloy and comparable to the 2nd generation
- Excellent hot corrosion resistance
- Density : 8.8g/cm3
Single Crystal model bucket (170mm)
This super alloy was jointly developed by the below organizations,
- Kansai Electric Power Co. Inc.
- Nagoya University
- Hitachi, Ltd.
and reported at IGTC (International Gas Turbine Conference) held in December 2007, Japan.
