Page 56 - Handbook of Energy Engineering Calculations
P. 56

You can also estimate excess air from oxygen readings. Use the relation,
               EA = (constant from list below)(O )/(21 − O ).
                                                         2
                                                                     2
                          Constants for Excess-Air Calculations























               If the percent volume of oxygen measured is 3 on a dry basis in a natural-gas
               (methane) fired boiler, the excess air, EA = (90)[3/(21 – 3)] = 15 percent.
                  This  procedure  is  the  work  of  V.  Ganapathy,  Heat  Transfer  Specialist,

               ABCO Industries.
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