Flame Temperature and Species Calculations with an Excel/VBA Computer Code

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Title Flame Temperature and Species Calculations with an Excel/VBA Computer Code
Creator Lilley, David G.
Date 2013-09-25
Spatial Coverage Kauai, Hawaii
Subject AFRC 2013 Industrial Combustion Symposium
Description Paper from the AFRC 2013 conference titled Flame Temperature and Species Calculations with an Excel/VBA Computer Code by David G. Lillley
Abstract As a contribution to applied combustion calculations with and without dissociation of H2O and CO2, a simple, easy-to-use calculation procedure has been developed that permits rapid generation of general fuel-air and fuel-oxygen combustion with many parameter variations. Many fuels and mixtures, including municipal solid wastes, plastic and nonplastic, may be easily handled in the developed computer code. It is written in Excel/VBA and the program calculations are with immediate graphics of the parameter effects on the results, thus permitting an extensive range of parameter effects to be quickly investigated and assessed. The very-general fuel is specified by way of its C-H-O-N-S content. Over 100 standard fuels are in the data base for immediate calculations. Percentages of these may be specified easily so that several of them (and/or new fuels added by the user) are combined for a single calculation. Additional water content is easily specified by the user. The "air" is specified by way of the volume percent of oxygen, and the other component of "air" (nitrogen and/or carbon dioxide) is specified by the user. So also is the temperature of each inlet, the inlet fuel and "air" streams. The methodology and computer code takes as input also the equivalence ratio. A computer code is described which calculates the adiabatic flame temperature under the following user choices:  Type of fuel (CHONS amounts and heating value on a mass basis specified)  Different equivalence ratios  Type of oxidant (air or oxygen)  With and without limited dissociation of CO2 and H2O, and more detailed dissociation reactions  With "air" as the oxidant, the volume fraction of oxygen is specified  The inlet temperatures of the fuel and oxidant streams individually are specified Two types of results are generated: (a) the adiabatic flame temperature with the equilibrium product species both with and without dissociation; and (b) with the products temperature specified then the heat transfer inside the combustor is calculated, on the basis of products both with and without dissociation. In both these cases, the calculation automatically includes combustion in "air" and oxygen alone. The computer code is very user friendly, with automatic nested loops for parameter variation and automatic generation of graphs, which are particularly useful in assessing the particular process under consideration.
Type Event
Format application/pdf
Rights No Copyright issues
OCR Text Show
ARK ark:/87278/s6tn08b9
Setname uu_afrc
Date Created 2014-10-14
Date Modified 2014-10-14
ID 14376
Reference URL https://collections.lib.utah.edu/ark:/87278/s6tn08b9
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