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	Flaresim API	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	Ignored	Windchill	Ignored	Noise Attenuation	Active
Jet Dispersion	Ignored	Gaussian Dispersion	Ignored
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	Stack 1	Minimum Length	5.00 m	Maximum Length	100.00 m
Sizing Wind Direction	315.00 °	Sizing Wind Speed	10.000 m/s	Calculated Size	17.49 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	0.914 bar	Temperature	50.0 C	Humidity	4.00 %
Wind Speed	10.000 m/s	Wind Direction	315.00 °


Background
BackGround Noise	60.0 dB	Solar Radiation	1.010 kW/m2
Inc. Background Noise	Active	Inc. Solar Radiation	Active


Transmissivity
Method	Calculated	Min Value	0.870	Max Value	0.966

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	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	17.49 m

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

Radiation Limit kW/m2	Distance Limit m
1.577	90.33
3.155	44.42
4.732	26.87
6.309	Limit Not Reached

Noise Limit dB	Distance Limit m
80.0	430.86
90.0	145.46
100.0	43.41
110.0	Limit Not Reached

Fluid Data


Fluid: FIRE CASE


Input Data

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


LHV	35938.74 kJ/kg	Tc	285.9 C	LEL	2.50 %
Fluid Temperature	279.0 C	Pc	129.582 bar	Saturation	100.00 %
Molecular Weight	47.236	Cp/Cv	1.218	Ref. Pressure	1.140 bar

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Composition in mole fraction
Nitrogen	0.000000	Carbon dioxide	0.002606	Hydrogen sulphide	0.019447
Methane	0.021251	Ethane	0.021652	Propane	0.042803
i-Butane	0.011127	n-Butane	0.033280	i-Pentane	0.041600
n-Pentane	0.026363	n-Hexane	0.131415	n-Heptane	0.071271
n-Octane	0.039395	n-Nonane	0.024759	n-Decane	0.005714
Water	0.507317


Results

Flue to Feed Volume Ratio	6.205		Stoichiometric O2	4.154
Enthalpy @ 25°C	365.54 kJ/kg		Enthalpy @ Fluid Temp.	908.43 kJ/kg

Stoichiometric Flue Gas Composition
Carbon Dioxide	0.41828 mole/mole	Water	0.57859 mole/mole	Oxygen	0.00000 mole/mole
Nitrogen	0.00000 mole/mole	Sulphur Dioxide	0.00313 mole/mole

Assist Fluids


Assist Fluid: AssistFluid 1

Type	Air	Flow Basis	User	Smokeless Method	Flaresim
Assist Fluid Ratio	1.000	Correct Heat Radiated	Active	Length Correction	Active

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	3.00 m	Tip Diameter	304.74 mm	Tip Opening	100.00 %
Seal Type	Molecular 1	Diameter Basis	Tip


Fluids
Fluid	FIRE CASE	LP Fluid		Assist Fluid	AssistFluid 1
Fluid Mass Flow	30271.000 kg/h	LP Mass Flow	0.000 kg/h	Assist Mass Flow	1514.000 kg/h
Fluid Mole Flow	0.178 kgmole/s	LP Mole Flow	0.000 kgmole/s


Pressure Drop
Riser Diameter	304.74 mm	Tip Outlet Pressure	-----	Contraction Coeff.	1.000
Roughness	0.02500 mm	Exit Loss	1.000

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 5
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Flame and Radiation
F Factor Method	High Efficiency
Combustion Air Ratio	1.000	Flame Temperature	1783.0 C
Flame Length Method	Flaresim
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


Dynamic Input

Time s	HP Mass Flow kg/h	LP Mass Flow kg/h

-----


Tip: Tip 1 - Results


General
Flame Length	37.00 m	Heat Release	302194.0 kW	Tip End - Northing	0.00 m
API Flame Length	37.15 m	Frac.Heat Radiated	0.177	Tip End - Easting	0.00 m
Exit Temperature	279.0 C	Actual Volume Flow	32101.433 m3/h	Tip End - Elevation	20.49 m
Assist Fluid Mass Flow	1514.000 kg/h	Assist Fluid Flow Ratio	0.050	Wind Speed At Tip	10.000 m/s


Velocities and Pressure Drop
Exit Velocity	122.258 m/s	Tip Outlet pres.	0.914 bar	Total Outlet pres.	0.985 bar
Sonic Velocity	343.581 m/s	Tip Backpres.	0.923 bar	Total Backpres.	0.993 bar
Exit Mach Number	0.356	Seal Backpres.	0.934 bar	Total Backpres.	1.003 bar
Contraction Coeff.	1.000	Stack Backpres.	0.984 bar	Total Backpres.	1.050 bar
		Tip Pressure Drop	0.009 bar	Tip Total Pressure Drop	0.008 bar
		Seal Pressure Drop	0.010 bar	Seal Total Pressure Drop	0.009 bar
		Stack Pressure Drop	0.050 bar	Stack Total Pressure Drop	0.047 bar


Flame Shape Points
	X	Y	Z

0.00 m

20.49 m

-19.03 m

19.03 m

40.23 m

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 6
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3D Flame Shape Chart


2D Flame Shape Chart, Northing-Easting

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 7
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2D Flame Shape Chart, Northing-Elevation


2D Flame Shape Chart, Easting-Elevation


Noise Results
Peak sound pressure
Distance	30.00 m	Sound pressure	104.3 dB

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Noise Spectrum Results

Frequency Hz	Total PWL dB	Combustion PWL dB	Jet PWL dB
31.3	107.7	107.3	97.2
62.5	116.0	115.8	101.8
125.0	124.3	124.3	101.0
250.0	132.8	132.8	97.7
500.0	141.3	141.3	92.8
1000.0	138.5	138.5	87.1
2000.0	135.7	135.7	81.1
4000.0	132.9	132.9	75.1
8000.0	130.1	130.1	69.1
16000.0	127.3	127.3	63.1


Noise Spectrum


Combustion Results General
Adiabatic Flame Temperature	2087.1 C	Calculated Flame Temperature	1783.0 C


Combustion Gas Mass Flow
Carbon dioxide	72751.885 kg/h	Water	41302.562 kg/h	Oxygen	695.749 kg/h
Nitrogen	278463.861 kg/h	Sulphur dioxide	798.385 kg/h	Nitrogen monoxide	31.805 kg/h
Carbon monoxide	172.972 kg/h	Methane	65.449 kg/h	Argon	4576.575 kg/h

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 9
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Combustion Gas Mole Flow
Carbon dioxide	0.459 kgmole/s	Water	0.637 kgmole/s	Oxygen	0.006 kgmole/s
Nitrogen	2.761 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	0.032 kgmole/s


Purge Gas Results
Fixed velocity rate	15.008 kg/h	Fixed volume velocity	0.001 m/s	Fixed volume rate	0.270 kg/h
HUSA velocity	0.004 m/s	Reduced HUSA velocity	0.004 m/s	API velocity	-----
HUSA rate	0.880 kg/h	Reduced HUSA rate	0.880 kg/h	API flow	-----

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

0.00

4.728

97.5

107.5

106.2

115.9


Receptor Point: Point 1 - Active


Input Data

Location		Properties		Sizing
Northing	0.00 m	Emissivity	0.700	Max. Radiation	4.730 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	Stack 1 (Base)	Area Ratio	2.000	Max. Average Noise	-----
Angle From North	0.00 °	Mass Cp	450.000 J/kg/C	Max.A Noise	-----
Angle To Horizontal	0.00 °	Initial Temp.	15.6 C	Max.Temp.	-----
Radius	0.00 m	Orientation	None
		Local Environment	Global


Results

Radiation		Temperature		Noise
Radiation	4.728 kW/m2	Temperature	115.9 C	Average Noise	97.5 dB
Concentration		Local Wind Speed		Noise	107.5 dB
Concentration	-----	Local Wind Speed	10.000 m/s	Noise A (*)	106.2 dB

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Noise Spectrum Results

Frequency	Noise	*Noise A ()**

31.3 Hz

70.9 dB

31.5 dB

62.5 Hz

78.8 dB

52.6 dB

125.0 Hz

87.1 dB

71.0 dB

250.0 Hz

95.6 dB

87.0 dB

500.0 Hz

104.1 dB

100.9 dB

1000.0 Hz

101.3 dB

2000.0 Hz

98.5 dB

99.7 dB

4000.0 Hz

95.5 dB

96.5 dB

8000.0 Hz

91.5 dB

90.4 dB

16000.0 Hz

83.6 dB

77.0 dB


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


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

20.0

79.4

20.0

24.2

158.7

30.0

28.3

238.1

40.0

32.2

317.4

50.0

35.9

396.8

60.0

39.5

476.1

70.0

42.9

555.5

80.0

46.2

634.9

90.0

49.4

714.2

100.0

52.4

793.6

110.0

55.3

872.9

120.0

58.1

952.3

130.0

60.7

1031.6

140.0

63.3

1111.0

150.0

65.7

1190.4

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 11
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Time	Temp.	TDU	Time	Temp.	TDU
s	C	(kW/m2)4/3.s	s	C	(kW/m2)4/3.s

160.0

68.0

1269.7

170.0

70.3

1349.1

180.0

72.4

1428.4

190.0

74.4

1507.8

200.0

76.4

1587.1

210.0

78.2

1666.5

220.0

80.0

1745.9

230.0

81.7

1825.2

240.0

83.3

1904.6

250.0

84.8

1983.9

260.0

86.3

2063.3

270.0

87.7

2142.7

280.0

89.0

2222.0

290.0

90.3

2301.4

300.0

91.5

2380.7

310.0

92.7

2460.1

320.0

93.8

2539.4

330.0

94.9

2618.8

340.0

95.9

2698.2

350.0

96.8

2777.5

360.0

97.8

2856.9

370.0

98.6

2936.2

380.0

99.5

3015.6

390.0

100.3

3094.9

400.0

101.0

3174.3

410.0

101.7

3253.7

420.0

102.4

3333.0

430.0

103.1

3412.4

440.0

103.7

3491.7

450.0

104.3

3571.1

460.0

104.8

3650.4

470.0

105.4

3729.8

480.0

105.9

3809.2

490.0

106.4

3888.5

500.0

106.8

3967.9

510.0

107.3

4047.2

520.0

107.7

4126.6

530.0

108.1

4205.9

540.0

108.5

4285.3

550.0

108.8

4364.7

560.0

109.2

4444.0

570.0

109.5

4523.4

580.0

109.8

4602.7

590.0

110.1

4682.1

600.0

110.4

4761.4

610.0

110.7

4840.8

620.0

110.9

4920.2

630.0

111.2

4999.5

640.0

111.4

5078.9

650.0

111.6

5158.2

660.0

111.8

5237.6

670.0

112.0

5316.9

680.0

112.2

5396.3

690.0

112.4

5475.7

700.0

112.6

5555.0

710.0

112.7

5634.4

720.0

112.9

5713.7

730.0

113.0

5793.1

740.0

113.2

5872.4

750.0

113.3

5951.8

760.0

113.4

6031.2

770.0

113.6

6110.5

780.0

113.7

6189.9

790.0

113.8

6269.2

800.0

113.9

6348.6

810.0

114.0

6428.0

820.0

114.1

6507.3

830.0

114.2

6586.7

840.0

114.3

6666.0

850.0

114.3

6745.4

860.0

114.4

6824.7

870.0

114.5

6904.1

880.0

114.6

6983.5

890.0

114.6

7062.8

900.0

114.7

7142.2

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 12
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Temperature Chart


TDU Chart

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Receptor Grids


Receptor Grid: Grid 1 - Active


Input Data

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


Axis information
Northing	Minimum	-200.00 m	Maximum	200.00 m	Nbr. of Points	201
Easting	Minimum	-200.00 m	Maximum	200.00 m	Nbr. of Points	201


Results


Maximum Radiation
Sizing Limit	-----	Find Max. Rad.	True	Initial Grid Points	11
Radiation	5.482 kW/m2	Northing	-9.52 m	Easting	9.51 m


Radiation chart

10/3/2022 4:53:52 PM	Flaresim 5.2.2.1381	Page 14
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Temperature chart


Noise chart

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Messages


Level	Message

Info:

Calculations started at 10/3/2022 4:42:47 PM

Info:

Calculating base case

Info:

Sizing calculations complete

Info:

Point Point 1 : Calculated

Info:

Grid Grid 1 : Calculated

Info:

Calculations completed at 4:42:47 PM