Project CFB was initiated at the University of North Dakota Energy and Environmental Research Center (EERC) in May 1988. Specific goals of the project were to 1) construct a circulating fluidized-bed combustor (CFBC) facility representative of the major boiler vendors' designs with the capability of producing scalable data, 2) develop a database for use in making future evaluations of CFBC technology, and 3) provide a _ facility for evaluating fuels, free of vendor bias, for use in the energy industry. Five coals were test-burned in the 1-M_Wthunit: North Dakota and Asian lignites, a Wyoming subbituminous, and Colorado and Pennsylvania bituminous coals. A total of 54 steadystate test periods were conducted, with the key test parameters being the average combustor temperature, excess air, superficial gas velocity, calcium-to-sulfur molar ratio, and the primary air-to-secondary air split.
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