4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 1
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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QUALITY ASSURANCE CONTROL SHEET

Check Code
Calculations By
Date
Time
Calculations Approved by
Date
Time


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 2
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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Calculation Options

General
Method Brzustowski Nbr Flame Elem. 1 Calculation mode Sizing
Element Position 50 Active Environment Environment 2 Noise Method Spectrum
Liquid Buoyancy 0.030 m/s Pipe Buoyancy 3.048 m/s Sonic Buoyancy 4.572 m/s

Options
Expert Mode Ignored Windchill Ignored Noise Attenuation Active
Jet Dispersion Ignored Gaussian Dispersion Active
Run Dynamics False Run Case Studies True

Heat Transfer Coef. in W/m2/K Temperature Rise Calculations
HTC = 1.25 * WindSpeed^ 1.00 + 4.54 Wind speed below 4.572 m/s Exposure Time 900.0 s
HTC = 3.18 * WindSpeed^ 0.75 + 0.00 For higher wind speeds Nbr of Steps 90

Emission Data
NOX Basis Mass/Heat Release CO Basis Mass/Heat Release HC Basis Mass/Heat Release
NOX Rate 0.02923 kg/GJ CO Rate 0.15900 kg/GJ HC Rate 0.06016 kg/GJ

Fitting Data
Fitting Tip Fitting Point <All Active>
Fitting Result ----- Fitting Error -----

Sizing Information
Stack to be sized None Minimum Length 5.00 m Maximum Length 100.00 m
Sizing Wind Direction ----- Sizing Wind Speed ----- Calculated Size -----

Pressure Profile
Pressure Tolerance 0.000 bar Tip Elements 4 Riser Elements 40

Dispersion Data
Jet Disp. Averaging Short Jet Disp. Stop Conc. 0.00001 mole/mole

Environmental data

Environment: Environment 2 - Active

Atmosphere
Pressure 1.013 bar Temperature 15.6 C Humidity 10.00 %
Wind Speed 2.000 m/s Wind Direction 0.00 °

Background
BackGround Noise 60.0 dB Solar Radiation 0.800 kW/m2
Inc. Background Noise Active Inc. Solar Radiation Active

Transmissivity
Method Calculated Min Value 1.000 Max Value 1.000


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 3
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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Wind Rose Calculations
Wind Speed Array Ignored Wind Speed vs Direction Ignored

Dispersion Data
Stability Class PasquillD Terrain Class Rural Surface Roughness 0.20 m
Wind Reference Height 10.00 m Correct Wind Speed False

Stack Configuration Data

Stack: Stack 1 - Active

Input Data

Base point name Stack 1 (Base) Base refers to Origin
Base - Northing 0.00 m Base - Easting 0.00 m Base - Elevation 0.00 m
Base - Angle from North 0.00 ° Base - Angle to Horizontal 0.00 ° Base - Radius 0.00 m
Stack
Rotation from North 0.00 ° Angle to Horizontal 90.00 ° Stack Length 100.00 m

Sterile Area
Elevation 0.00 m Noise Basis Noise Run SA Calcs False

Fluid Data

Fluid: Fluid 1

Input Data

Thermo Method Flaresim
Use Temp Corr. False Use RK ZFactor True

LHV 48964.54 kJ/kg Tc -70.3 C LEL 4.69 %
Fluid Temperature 15.6 C Pc 47.062 bar Saturation 100.00 %
Molecular Weight 17.486 Cp/Cv 1.302 Ref. Pressure 1.013 bar

Composition in mole fraction
Methane 0.900000 Ethane 0.090000 Hydrogen sulphide 0.010000


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 4
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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Results

Flue to Feed Volume Ratio 3.170 Stoichiometric O2 2.130
Enthalpy @ 25°C 583.47 kJ/kg Enthalpy @ Fluid Temp. 563.34 kJ/kg

Stoichiometric Flue Gas Composition
Carbon Dioxide 0.34069 mole/mole Water 0.65615 mole/mole Oxygen 0.00000 mole/mole
Nitrogen 0.00000 mole/mole Sulphur Dioxide 0.00315 mole/mole

Tip Data

Tip: Tip 1 - Active

Input Data

General
Tip Type Pipe Located on stack Stack 1 Nbr of Burners 1
Angle to Horizontal 90.00 ° Angle to North 0.00 °
Tip Length 0.00 m Tip Diameter 488.94 mm Tip Opening 100.00 %
Seal Type None Diameter Basis Tip

Fluids
Fluid Fluid 1 LP Fluid Assist Fluid
Fluid Mass Flow 20000.000 kg/h LP Mass Flow 0.000 kg/h Assist Mass Flow 0.000 kg/h
Fluid Mole Flow 0.318 kgmole/s LP Mole Flow 0.000 kgmole/s

Pressure Drop
Riser Diameter 488.94 mm Tip Outlet Pressure ----- Contraction Coeff. 1.000
Roughness 0.02500 mm Exit Loss 1.000

Flame and Radiation
F Factor Method Generic Pipe
Combustion Air Ratio 1.000 Flame Temperature 1999.9 C
Flame Length Method Brzustowski
Radiation Method Global Flame Element Count 1 Element Position 50.00 %

Noise
Noise Method Acoustic Eff. Comb. Efficiency 0.00010 % Peak Frequency 500 Hz
Jet Noise Method Flaresim

Purge Gas
Purge Gas Fluid Nitrogen Purge Area Basis Stack Purge Fixed Velocity 0.060 m/s
Purge Fixed Volume Flow 0.283 m3/h Purge HUSA O2 6.00 % Purge HUSA Height 7.62 m

Emission Data
NOX Basis Mass/Heat Release CO Basis Mass/Heat Release HC Basis Mass/Heat Release
NOX Rate 0.02923 kg/GJ CO Rate 0.15900 kg/GJ HC Rate 0.06016 kg/GJ


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 5
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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Tip: Tip 1 - Results

General
Flame Length 27.22 m Heat Release 272024.5 kW Tip End - Northing 0.00 m
API Flame Length 35.33 m Frac.Heat Radiated 0.236 Tip End - Easting 0.00 m
Exit Temperature 15.6 C Actual Volume Flow 27030.858 m3/h Tip End - Elevation 100.00 m
Assist Fluid Mass Flow ----- Assist Fluid Flow Ratio ----- Wind Speed At Tip 2.000 m/s

Velocities and Pressure Drop
Exit Velocity 39.991 m/s Tip Outlet pres. 1.013 bar Total Outlet pres. 1.019 bar
Sonic Velocity 422.277 m/s Tip Backpres. 1.013 bar Total Backpres. 1.019 bar
Exit Mach Number 0.095 Seal Backpres. 1.013 bar Total Backpres. 1.019 bar
Contraction Coeff. 1.000 Stack Backpres. 1.028 bar Total Backpres. 1.034 bar
Tip Pressure Drop 0.000 bar Tip Total Pressure Drop 0.000 bar
Seal Pressure Drop 0.000 bar Seal Total Pressure Drop 0.000 bar
Stack Pressure Drop 0.015 bar Stack Total Pressure Drop 0.015 bar

Flame Shape Points
X Y Z
1 0.00 m 0.00 m 100.00 m
2 -14.70 m 0.00 m 118.72 m

3D Flame Shape Chart


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 6
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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2D Flame Shape Chart, Northing-Easting

2D Flame Shape Chart, Northing-Elevation


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 7
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2D Flame Shape Chart, Easting-Elevation

Noise Results
Peak sound pressure
Distance 30.00 m Sound pressure 103.8 dB

Noise Spectrum Results

Frequency
Hz		 Total PWL
dB		 Combustion PWL
dB		 Jet PWL
dB
31.3 106.9 106.9 57.3
62.5 115.4 115.4 53.4
125.0 123.9 123.9 48.2
250.0 132.4 132.4 42.4
500.0 140.9 140.9 36.4
1000.0 138.1 138.1 30.4
2000.0 135.3 135.3 24.4
4000.0 132.5 132.5 18.4
8000.0 129.7 129.7 12.3
16000.0 126.9 126.9 6.3


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 8
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Noise Spectrum

Combustion Results General
Adiabatic Flame Temperature 2030.0 C Calculated Flame Temperature 1619.5 C

Combustion Gas Mass Flow
Carbon dioxide 53958.764 kg/h Water 42726.692 kg/h Oxygen 308.731 kg/h
Nitrogen 253800.590 kg/h Sulphur dioxide 732.743 kg/h Nitrogen monoxide 28.629 kg/h
Carbon monoxide 155.704 kg/h Methane 58.915 kg/h Argon 4171.230 kg/h

Combustion Gas Mole Flow
Carbon dioxide 0.341 kgmole/s Water 0.659 kgmole/s Oxygen 0.003 kgmole/s
Nitrogen 2.517 kgmole/s Sulphur dioxide 0.003 kgmole/s Nitrogen monoxide 0.000 kgmole/s
Carbon monoxide 0.002 kgmole/s Methane 0.001 kgmole/s Argon 0.029 kgmole/s

Purge Gas Results
Fixed velocity rate 47.932 kg/h Fixed volume velocity 0.000 m/s Fixed volume rate 0.334 kg/h
HUSA velocity 0.007 m/s Reduced HUSA velocity 0.007 m/s API velocity -----
HUSA rate 5.604 kg/h Reduced HUSA rate 5.604 kg/h API flow -----

Gaussian Dispersion

Gaussian Dispersion: Dispersion 1 - Active


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 9
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Input Data

Source FlaredFluid Type DownwindLine

Plane height 0 Line Origin Origin
Downwind
Minimum 100.00 m Maximum 10000.00 m Nbr. of Points 37

Pollutants
Methane Ignored Ethane Ignored Hydrogen sulphide Active

Down Wind Line Result Tables

Downwind Hydrogen sulphide .
m µg/m3 .
100.00 0.00000 .
375.00 0.00000 .
650.00 0.00013 .
925.00 0.12171 .
1200.00 2.29642 .
1475.00 10.51488 .
1750.00 25.31592 .
2025.00 43.58642 .
2300.00 61.91895 .
2575.00 78.17541 .
2850.00 91.46137 .
3125.00 101.66779 .
3400.00 109.07563 .
3675.00 114.11115 .
3950.00 117.21782 .
4225.00 118.79887 .
4500.00 119.19728 .
4775.00 118.69412 .
5050.00 117.51449 .
5325.00 115.83611 .
5600.00 113.79787 .
5875.00 111.50757 .
6150.00 109.04842 .
6425.00 106.48428 .
6700.00 103.86392 .
6975.00 101.22436 .
7250.00 98.59346 .
7525.00 95.99200 .
7800.00 93.43525 .
8075.00 90.93421 .
8350.00 88.49658 .
8625.00 86.12754 .
8900.00 83.83029 .
9175.00 81.60655 .
9450.00 79.45687 .
9725.00 77.38097 .
10000.00 75.37790 .


4/2/2022 5:33:30 PM Flaresim 2021.2.55 Page 10
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DataFile E:\Manuals\Tutorial\FLARE\Practice\Dispersion Example.fsw
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Downwind Hydrogen sulphide .
m µg/m3 .

Downwind Line Pollutant Concentration Chart

Messages

Level Message
Info: Calculations started at 4/2/2022 3:09:37 PM
Info: Calculating base case
Info: Calculations completed at 3:09:37 PM