This package has 3 programs:
Heat loss through multi-layered
insulation/refractory
Circular stack/duct wall temperature,heat
loss calculations
Acid dew point calculations
Heat
loss through multi-layered Insulation/refractory
Heat loss through multi-layered insulation/refractory(up to 6 layers)
and intermediate layer temperatures in circular or rectangular ducts can
be computed by this program.You can create your own list of insulation/refractory-up
to 35 names by inputting their temperature vs k values at four different
points.The program comes with AP Green insulation/refractory data
but they can be easily altered to include your own list.Program runs in
both British and Metric units.
Example:A 2 layered refractory in a flat plate has a hot face
temperature of 1900 F.The first layer is 4 in thick and made of AP Green
ks4 and the second layer is 3 in thick of castable block mix. The ambient
temperature is 90 F,wind velocity =120 ft/min,casing emissivity=0.9.
Input/output from the program
Data
project - sample units- British surface-flat hot face temperature-1900 F ambient temperature-90 F wind velocity-120 ft/min casing emissivity-0.9 layer1 -ks4 - 4 in layer2-cbm -3 in |
Results
project-sample units-British layer name thick temp in temp out in F F 1 ks4-2550 4 1902 1626 2 cbm-1600 3 1626 225 amb temp-F=90 hot face-F=1900 wind vel-fpm=120 emiss=.9 heat loss-Btu/ft2h=428 max heat loss-(no insuln)-Btu/ft2h=53940 |
Stack/Duct
temperature calculations
This program predicts the exit gas temperature,heat loss,wall temperatures
of circular ducts/stacks.Wall temperatures give an idea if corrosion is
likely to occur.Program runs in both British and Metric units.
Example:78,000 lb/h or boiler flue gases at 400 F enter a circular
stack of diameter 36 in.Gas pressure is 14.5 psia,stack wall thickness=1.5
in,stack height=45 ft.Gas analysis:% vol co2=8,h2o=18,n2=71,o2=3. Ambient
temperature=80F and wind velocity=440 ft/min.Deterine the stack wall temperatures,heat
loss and exit gas temperature.
Inputs/outputs from the program are shown below.
Data
project - sample units-British ambient temperature-F=80 wind velocity-ft/min=440 gas pressure-psia=14.5 gas inlet temperature-F=400 stack diameter-in=36 stack thickness-in=1.5 stack height-ft=45 % vol co2=8 h2o=18 n2=71 o2=3 |
Results
heat loss from stack-Btu/ft2h=752 stack inner wall temperature-F=253 stack outer wall temperature-F=249 gas heat transfer coefficient-Btu/ft2hF=5.83 exit gas temperature-F=384 stack gas velocity-ft/min=4084 gas mol wt=27.6 |
Example:A flue
gas at 14.5 psia contains in % volume-water vapor-12,hydrochloric acid
vapor-1,so2=1.% conversion of so2 to so3 is 2. Determine the dew points
of the vapors.Note that we could also have inputted % volume of hrdrobromic
and nitric acid vapors and their dew points would be computed.
Data
project-sample units-British gas pressure-14.5 psia % vol h2o-12 hbr- hcl-1 hno3- so2-1 % conversion-2 |
Results
wat vap dew pt -123 F Hcl dew pt - 146 F Hbr dew point- Hno3 dew pt- ppm so3-160 h2so4 dew pt-336 F |
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