Flaresim for Windows, case

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QUALITY ASSURANCE CONTROL SHEET

Check Code
Calculations By
Date
Time
Calculations Approved by
Date
Time

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Calculation Options


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

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


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	Stack 1	Minimum Length	1.00 m	Maximum Length	200.00 m
Sizing Wind Direction	0.00 °	Sizing Wind Speed	16.000 m/s	Calculated Size	70.32 m

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 1 - Active

Atmosphere
Pressure	1.100 bar	Temperature	23.6 C	Humidity	74.00 %
Wind Speed	16.000 m/s	Wind Direction	0.00 °


Background
BackGround Noise	60.0 dB	Solar Radiation	1.000 kW/m2
Inc. Background Noise	Active	Inc. Solar Radiation	Active


Transmissivity
Method	Calculated	Min Value	0.725	Max Value	0.805

9/24/2022 6:46:42 PM	Flaresim 2021.2.55	Page 3
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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	70.32 m

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

Fluid Data


Fluid: Blocked Outlet flow


Input Data

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


LHV	12470.39 kJ/kg	Tc	-28.5 C	LEL	7.40 %
Fluid Temperature	360.0 C	Pc	81.149 bar	Saturation	100.00 %
Molecular Weight	13.140	Cp/Cv	1.373	Ref. Pressure	1.100 bar


Composition in mole fraction
Methane	0.004600	Hydrogen	0.488451	Carbon monoxide	0.151685
Water	0.294171	Carbon dioxide	0.051695	Argon	0.000200
Nitrogen	0.009199

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Results

Flue to Feed Volume Ratio	1.009		Stoichiometric O2	0.329
Enthalpy @ 25°C	675.63 kJ/kg		Enthalpy @ Fluid Temp.	1478.97 kJ/kg

Stoichiometric Flue Gas Composition
Carbon Dioxide	0.20608 mole/mole	Water	0.78460 mole/mole	Oxygen	0.00000 mole/mole
Nitrogen	0.00912 mole/mole	Sulphur Dioxide	0.00000 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	5.00 m	Tip Diameter	2956.49 mm	Tip Opening	100.00 %
Seal Type	Molecular 1	Diameter Basis	Stack


Fluids
Fluid	Blocked Outlet flow	LP Fluid		Assist Fluid
Fluid Mass Flow	510000.000 kg/h	LP Mass Flow	0.000 kg/h	Assist Mass Flow	0.000 kg/h
Fluid Mole Flow	10.782 kgmole/s	LP Mole Flow	0.000 kgmole/s


Pressure Drop
Riser Diameter	2956.49 mm	Tip Outlet Pressure	1.100 bar	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	1714.0 C
Flame Length Method	Brzustowski
Radiation Method	Global	Flame Element Count	1	Element Position	50.00 %


Noise
Noise Method	Low Noise Reference
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

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Tip: Tip 1 - Results


General
Flame Length	87.64 m	Heat Release	1766633.7 kW	Tip End - Northing	0.00 m
API Flame Length	86.35 m	Frac.Heat Radiated	0.190	Tip End - Easting	0.00 m
Exit Temperature	360.0 C	Actual Volume Flow	1857492.744 m3/h	Tip End - Elevation	75.32 m
Assist Fluid Mass Flow	-----	Assist Fluid Flow Ratio	-----	Wind Speed At Tip	16.000 m/s


Velocities and Pressure Drop
Exit Velocity	75.160 m/s	Tip Outlet pres.	1.100 bar	Total Outlet pres.	1.108 bar
Sonic Velocity	741.771 m/s	Tip Backpres.	1.100 bar	Total Backpres.	1.108 bar
Exit Mach Number	0.101	Seal Backpres.	1.101 bar	Total Backpres.	1.109 bar
Contraction Coeff.	1.000	Stack Backpres.	1.103 bar	Total Backpres.	1.111 bar
		Tip Pressure Drop	0.000 bar	Tip Total Pressure Drop	0.000 bar
		Seal Pressure Drop	0.001 bar	Seal Total Pressure Drop	0.001 bar
		Stack Pressure Drop	0.002 bar	Stack Total Pressure Drop	0.002 bar


Flame Shape Points
	X	Y	Z

0.00 m

75.32 m

-77.08 m

0.00 m

101.66 m


3D Flame Shape Chart

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2D Flame Shape Chart, Northing-Easting


2D Flame Shape Chart, Northing-Elevation

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2D Flame Shape Chart, Easting-Elevation


Noise Results
Peak sound pressure
Distance	30.00 m	Sound pressure	95.3 dB


Noise Spectrum Results

Frequency Hz	Total PWL dB	Combustion PWL dB	Jet PWL dB
31.3	126.7	126.7	85.7
62.5	131.7	131.7	80.0
125.0	129.7	129.7	74.0
250.0	127.7	127.7	68.0
500.0	122.7	122.7	62.0
1000.0	120.7	120.7	56.0
2000.0	115.7	115.7	50.0
4000.0	111.7	111.7	44.0
8000.0	110.7	110.7	38.0
16000.0	107.7	107.7	31.9

9/24/2022 6:46:42 PM	Flaresim 2021.2.55	Page 8
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Noise Spectrum


Combustion Results General
Adiabatic Flame Temperature	1971.5 C	Calculated Flame Temperature	1686.6 C


Combustion Gas Mass Flow
Carbon dioxide	352631.100 kg/h	Water	552806.733 kg/h	Oxygen	2005.023 kg/h
Nitrogen	1341256.096 kg/h	Sulphur dioxide	0.000 kg/h	Nitrogen monoxide	185.930 kg/h
Carbon monoxide	1011.201 kg/h	Methane	382.617 kg/h	Argon	22043.898 kg/h


Combustion Gas Mole Flow
Carbon dioxide	2.226 kgmole/s	Water	8.524 kgmole/s	Oxygen	0.017 kgmole/s
Nitrogen	13.300 kgmole/s	Sulphur dioxide	0.000 kgmole/s	Nitrogen monoxide	0.002 kgmole/s
Carbon monoxide	0.010 kgmole/s	Methane	0.007 kgmole/s	Argon	0.153 kgmole/s


Purge Gas Results
Fixed velocity rate	1850.869 kg/h	Fixed volume velocity	0.000 m/s	Fixed volume rate	0.353 kg/h
HUSA velocity	0.097 m/s	Reduced HUSA velocity	0.097 m/s	API velocity	-----
HUSA rate	2994.245 kg/h	Reduced HUSA rate	2993.977 kg/h	API flow	-----

9/24/2022 6:46:42 PM	Flaresim 2021.2.55	Page 9
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Receptor Points


Receptor Point Summary

Name	Status	Northing	Easting	Elevation	Radiation	Avg. Noise	Noise	NoiseA	Temp.
		m	m	m	kW/m2	dB	dB	dB	C

Point 1

Active

-35.00

0.00

3.054

76.6

86.6

76.9

39.7


Receptor Point: Point 1 - Active


Input Data

Location		Properties		Sizing
Northing	-35.00 m	Emissivity	0.700	Max. Radiation	3.054 kW/m2
Easting	0.00 m	Absorbtivity	0.700	Observed Radiation	-----
Elevation	0.00 m	Mass per Area	24.0 kg/m2	Max. Noise	-----
Location rel. to	Origin	Area Ratio	2.000	Max. Average Noise	100.0 dB
Angle From North	180.00 °	Mass Cp	450.000 J/kg/C	Max.A Noise	-----
Angle To Horizontal	0.00 °	Initial Temp.	15.6 C	Max.Temp.	-----
Radius	35.00 m	Orientation	None
		Local Environment	Global
		Threshold TDU	290
		Threshold Temperature	373.15


Results

				Noise
Radiation	3.054 kW/m2	Temperature	39.7 C	Average Noise	76.6 dB
Concentration	-----	Local Wind Speed	16.000 m/s	Noise	86.6 dB
Time to TDU Limit	65.5 s	Time to Temp. Limit	Limit Not Reached	Noise A (*)	76.9 dB


Noise Spectrum Results

Frequency	Noise	*Noise A ()**

31.3 Hz

77.4 dB

38.0 dB

62.5 Hz

82.4 dB

56.2 dB

125.0 Hz

80.4 dB

64.3 dB

250.0 Hz

78.4 dB

69.8 dB

500.0 Hz

73.5 dB

70.3 dB

1000.0 Hz

71.6 dB

2000.0 Hz

66.9 dB

68.1 dB

4000.0 Hz

63.4 dB

64.4 dB

8000.0 Hz

61.9 dB

60.8 dB

16000.0 Hz

60.2 dB

53.6 dB


(*) Noise A = Noise weighted for human ear sensitivity

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Noise Chart


Time Dependent Curves


Time	Temp.	TDU	Time	Temp.	TDU
s	C	(kW/m2)4/3.s	s	C	(kW/m2)4/3.s

0.0

15.6

0.0

10.0

18.3

44.3

20.0

20.8

88.6

30.0

23.0

132.9

40.0

24.9

177.2

50.0

26.7

221.5

60.0

28.2

265.8

70.0

29.5

310.1

80.0

30.7

354.4

90.0

31.7

398.7

100.0

32.7

443.0

110.0

33.5

487.3

120.0

34.2

531.6

130.0

34.8

575.9

140.0

35.4

620.3

150.0

35.9

664.6

160.0

36.3

708.9

170.0

36.7

753.2

180.0

37.1

797.5

190.0

37.4

841.8

200.0

37.6

886.1

210.0

37.9

930.4

220.0

38.1

974.7

230.0

38.3

1019.0

240.0

38.4

1063.3

250.0

38.6

1107.6

260.0

38.7

1151.9

270.0

38.8

1196.2

280.0

38.9

1240.5

290.0

39.0

1284.8

300.0

39.1

1329.1

310.0

39.2

1373.4

320.0

39.2

1417.7

330.0

39.3

1462.0

340.0

39.3

1506.3

350.0

39.4

1550.6

360.0

39.4

1594.9

370.0

39.4

1639.2

380.0

39.5

1683.5

390.0

39.5

1727.8

400.0

39.5

1772.2

410.0

39.5

1816.5

420.0

39.5

1860.8

430.0

39.6

1905.1

440.0

39.6

1949.4

450.0

39.6

1993.7

460.0

39.6

2038.0

470.0

39.6

2082.3

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Time	Temp.	TDU	Time	Temp.	TDU
s	C	(kW/m2)4/3.s	s	C	(kW/m2)4/3.s

480.0

39.6

2126.6

490.0

39.6

2170.9

500.0

39.6

2215.2

510.0

39.6

2259.5

520.0

39.6

2303.8

530.0

39.6

2348.1

540.0

39.6

2392.4

550.0

39.6

2436.7

560.0

39.6

2481.0

570.0

39.7

2525.3

580.0

39.7

2569.6

590.0

39.7

2613.9

600.0

39.7

2658.2

610.0

39.7

2702.5

620.0

39.7

2746.8

630.0

39.7

2791.1

640.0

39.7

2835.4

650.0

39.7

2879.7

660.0

39.7

2924.1

670.0

39.7

2968.4

680.0

39.7

3012.7

690.0

39.7

3057.0

700.0

39.7

3101.3

710.0

39.7

3145.6

720.0

39.7

3189.9

730.0

39.7

3234.2

740.0

39.7

3278.5

750.0

39.7

3322.8

760.0

39.7

3367.1

770.0

39.7

3411.4

780.0

39.7

3455.7

790.0

39.7

3500.0

800.0

39.7

3544.3

810.0

39.7

3588.6

820.0

39.7

3632.9

830.0

39.7

3677.2

840.0

39.7

3721.5

850.0

39.7

3765.8

860.0

39.7

3810.1

870.0

39.7

3854.4

880.0

39.7

3898.7

890.0

39.7

3943.0

900.0

39.7

3987.3


Temperature Chart

9/24/2022 6:46:42 PM	Flaresim 2021.2.55	Page 12
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TDU Chart

Receptor Grids


Receptor Grid: Grid 1 - Active


Input Data

Location		Properties		Noise
Orientation	Elevation-Northing	Emissivity	0.700	Noise Basis	Noise
Offset	0.00 m	Point Absorbtivity	0.700
Axis 1	Elevation	Area Ratio	2.000
Axis 2	Northing	Point Orientation	None


Axis information
Elevation	Minimum	0.00 m	Maximum	300.00 m	Nbr. of Points	100
Northing	Minimum	-150.00 m	Maximum	150.00 m	Nbr. of Points	100


Results


Maximum Radiation
Sizing Limit	-----	Find Max. Rad.	True	Initial Grid Points	11
Radiation	3008023436.044 kW/m2	Elevation	97.01 m	Northing	-38.54 m

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Radiation chart


Temperature chart

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Noise chart


Receptor Grid: Grid 2 - Active

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Input Data

Location		Properties		Noise
Orientation	Elevation-Easting	Emissivity	0.700	Noise Basis	Noise
Offset	0.00 m	Point Absorbtivity	0.700
Axis 1	Elevation	Area Ratio	2.000
Axis 2	Easting	Point Orientation	None


Axis information
Elevation	Minimum	0.00 m	Maximum	300.00 m	Nbr. of Points	100
Easting	Minimum	-170.00 m	Maximum	170.00 m	Nbr. of Points	100


Results


Maximum Radiation
Sizing Limit	-----	Find Max. Rad.	True	Initial Grid Points	11
Radiation	15.227 kW/m2	Elevation	97.01 m	Easting	0.00 m


Radiation chart

9/24/2022 6:46:42 PM	Flaresim 2021.2.55	Page 16
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Temperature chart


Noise chart

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Messages


Level	Message

Info:

Calculations started at 9/24/2022 6:24:39 PM

Info:

Calculating base case

Info:

Sizing calculations complete

Info:

Point Point 1 : Calculated

Info:

Grid Grid 1 : Calculated

Info:

Grid Grid 2 : Calculated

Info:

Calculations completed at 6:24:40 PM