Transcription of Calculating NOx Levels - Bloom Eng
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Calculating NOx Levels - Bloom Eng
Measured) O % - ( )- ( measured O % at ppm = O 3% at ppm222 Equation 1 Emission Levels are also expressed as pounds of NOX per million Btu or per hour. Common practice is to use theweight of NO2 for Calculating the NOX Levels with the following two equations:Equation 2 HHV X )O % measured - ( X 379 PFRS X NO ppm measured X 46 X = Btu /millionNO million X Btu /millionNO lb. = the United States, the fuel's higher heating value (HHV) is used in the calculations. Lower heating values (LHV) areused in many other countries. Average natural gas (1050 Btu/ SCF, HHV) at stoichiometric ratio produces dry SCF products of combustion per SCF of fuel. This volume varies with actual gas NOX emission data are expressed in ppm corrected to some standard oxygen level it DOES NOT necessarilymean that the fuel was actually burned with this amount of excess oxygen.
(20.99 - % O measured) (20.99 -3) ppm at 3% O = ppm at % O measured X 2 2 2 Equation 1 Emission levels are also expressed as pounds of NOX per million Btu or per hour. Common practice is to use the
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