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Show Table 1. Experimental conditions used for testing of the modified K988 burner in the BERL. Parameter Flame 1 Flame 2 Flame 3 Flame 4 Flame 5 Flame A Fuel Natural Gas V' V' V' V' V' 7% Propane/16% Hydrogen! V' n% Natural Gas Mixture (vol.) Fuel Distribution 50% V' V' V' V' V' 66% V' 2° Air/Fuel Ratio 1.3 v/v V' V' V' 2.6 v/v V' v' 1°/2° SR = 0.85 V' V' V' V' V' V' Furnace SR 1.1 V' V' V' V' v' 1.0 V' Aame A - nitrogen used In place of air diluent In actuality significantly more than five flame conditions were studied during this program. However, the variables adjusted were restricted to those indicated in Table 1. DIAGNOSTICS Descriptions of the type of diagnostic work conducted at the BERL can be found in the publication by A. Sayre, et. al. [9]. For the Selas burner study, both conventional and advanced diagnostic methods were used. The conventional diagnostics, listed below, were used to parametrically evaluate the burner performance and monitor furnace conditions. The parametric tests were conducted by maintaining process variables constant while changing a single process variable over a range of operating condition. The conventional diagnostics were also used to ensure reproducible and stable operation when conducting long term advanced diagnostic tests. The conventional diagnostics included the following: • Exhaust Gas Composition (02, C02, CO, HC, NOx, N02, NO), • Exhaust Gas Temperature, • Single Point Furnace Gas Temperature, • Radiant Heat Flux, • Furnace Floor Temperatures, • Furnace Refractory Wall Temperatures, and • Cooling Water Heat Extraction. 5 |