COMBUSTION
CALCULATIONS USING GAS TURBINE EXHAUST
The
following are the results from the program on combustion calculations using
gas turbine exhaust.120,000 lb/h of Turbine exhaust at 900 F is heated
to 1200 F using a natural gas duct burner.The program computes the fuel
input and the exhaust gas analysis,once the fuel analysis is given. It
shows 10.56 MM Btu/h on LHV basis is required. The exhaust oxygen is reduced
to 13.45 % volume.Based on known content of NOx and CO in the incoming
gas(10 lb/h) and contributions from the burner,which can be varied(0.1
lb/MM NOx and CO were used in this example),the program also computes the
emissions in ppmvd-15 % oxygen dry as reference in the final exhaust gases.It
is interesting to note that the actual NOx ppmvd in the exhaust gases after
combustion is less than that in the incoming gases.Note that the program
does not predict the burner emissions but converts suggested burner contributions
in lb/MM Btu fired to ppmvd basis.
Click
this link for the calculation procedure.
Click
here for information on the program
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