ULTRA SUPERCRITICAL. Pulverized Coal-Fired Steam Generators. Introduction. Q: What is Ultra Supercritical (USC)? A: Not universally defined, but generally can be considered to be >3800 psig and >1100 F final steam conditions Q: Why Consider Ultra Supercritical?
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Pulverized Coal-Fired Steam Generators
Q: What is Ultra Supercritical (USC)?
A: Not universally defined, but generally can be considered to be >3800 psig and >1100 F final steam conditions
Q: Why Consider Ultra Supercritical?
A: Dramatic Improvement in Plant Efficiency
CYCLE HEAT RATE IMPROVEMENT
Availability Data for Supercritical verses Subcritical Units (Europe)
Recent Activities Assessing Ultra Supercritical Designs and Materials
Ultra Supercritical: Current State-of-the-Art
Significant Issues with Ultra Supercritical Project Implementation
Above issues present risks to project costs, schedule, and performance which are significant in comparison to standard subcritical or supercritical cycles.
Austenetic alloys and nickel based superalloys
100,000 Creep-Rupture Stress for USC Boiler Materials
P.J. Maiasz, I.G. Wright, J.P Shingeldecker, T.B. Gibbons, and R.R. Romanosky, “Defining the Materials Issues and Research for Ultra-Supercritical Steam Turbines,” Proceedings to the Fourth International Conference on Advances in Materials Technology for Fossil Power Plants (Hilton Head, SC, Oct. 25-28, 2004). ASM-International, Materials Park, OH, 2005.
Beyond Advanced Steam Conditions