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Show 19 ~ ~ ~ ~ Concentration LL. a: (ppm) <10,000 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 110,000 120,000 Figure 19 Predicted and Measured CO Concentrations for the New Arrangement CONCLUSIONS When coupled with equipment design experience and a fundamental understanding of the underlying physical processes, mathematical modeling can be a valuable tool for designing air staging systems. The proof of the tool's success is in the numerous field demonstrations of system designs. The model applications discussed in this paper were representative of a wide variety of fuels and firing arrangements. In each case, B&W's mathematical models accurately predicted the field performance of the staged systems. This validation increases confidence in the day-to-day use of the models and supports the expanding role that modeling will play in the development of new low emission technologies. Each case proves the power of modeling to scale up new technologies, to sort options, and to cost effectively design commercially successful 10w-NOx combustion systems. ACKNOWLEDGMENTS The contributions of Mr. Larry J. Chaney, Mr. Robert F. Gansman, Dr. Richard A. Wessel, and Dr. Woodrow A. Fiveland to the modeling of overfire air systems are acknowledged. Project participants in the CCT NOxlS02 Emission Control Program include the U.S. Department of Energy (DOE), Public Service Company of Colorado, Babcock & Wilcox (B&W), Electric Power Research Institute (EPRI), Noell, Inc., Fossil Energy Research Corporation, Stone & Webster Engineering Corporation, Western Research Institute, and Colorado School of Mines. Project participants in the CCT Cyclone Coal Reburn Demonstration Program include DOE, Wisconsin Power & Light Company, B&W, EPRI, State of Illinois Department of Natural Resources, Allegheny Power System, Atlantic Electric, Associated Electric, Baltimore Gas & Electric, Basin Electric Power |