Flare Calc Sheet Api Rp 521 6y2u3b

Flare Stack Calculation Sheet Simple Approach Title : HP Flare Calculation Project No : 1131/SKPI-SKPP-2006

1 Description 2 Flowrate 3 4 5 Mass Flow 6 Mol Weigth 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Pressure at Flare Tip Flowing Temperature Compressibility factor Ratio of Specific Heat Mach No

Date of Calculation : #################### Calculate By : Erwin Apriandi

Symbol

W Mw P2 T z k

Flare Tip ID

Unit 75.010 88,501.944 24.584 90123.000 24.070 124.000 283.900 1.000 1.210 0.450

0.404

MMscfd m3/hr m3/s kg/hr kPa K

m

Heat of combustion Heat Liberated Flame Length

Q L

47140.000 1180110.617 60.000

Wind velocity

U~

14.900

m/s

Uj

192.276

m/s

22 Flare Tip velocity U~/Uj 23 24 25 Σ∆y/L 26 27 Σ∆y 28 Σ∆x/L 29 30 Σ∆x 31 32 33 Fraction Radiated Heat 34 35 Allowable Radiation 36 Safe Distance to Flame Centre 37 38 39 Stack To Point of Interest 40 Flare Height 41

kJ/kg kW m

approx Fig 8 & 9

0.077

0.460 27.600

m

approx

0.770 46.200

m

F ‫ד‬ K D

0.300 1.000 6.310 66.836

kW/m2 m

R H

60.000 41.927

m m

Fig 10

approx Fig 10

Calculation are based on API RP 521

Flare Stack Calculation, Erwin A

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Flare Stack Calculation Sheet Brzustowski's and Sommer's Approach Title : HP Flare Calculation Project No : 1131/SKPI-SKPP-2006

1 Description

Date of Calculation : #################### Calculate By : Erwin Apriandi

Symbol

Unit

2 Flowrate 3 4 5 Mass Flow 6 Mol Weigth

W Mj

75.010 88,501.944 24.584 90123.000 24.070

MMscfd m3/hr m3/s kg/hr

7 Pressure at Flare Tip

Pj

124.000

kPa

Tj

283.900

K

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Air Temperature Compressibility factor Ratio of Specific Heat Mach No

T~ z k

289.000 1.000 1.210 0.450

K

Flare Tip ID

dj

0.404

m

Heat of combustion Heat Liberated Flame Length

Q L

47140.000 1180110.617 60.000

Fig C.2 From Fig C.2.B & C.3.B Horizontal distance, from stack to flame centre

32 33 34 35 36 37 38 39 40 41 42 43

8 Flowing Temperature

Wind velocity Sonic Velocity Flare Tip velocity

U~

LEL LEL Conc Factor Jet & Wind thrust parameter

CL

kJ/kg kW m

approx Fig 8 & 9

11.800 344.534 155.040

m/s m/s m/s

2.100 0.229 26.248

%v/v

xc

17.000

m

approx

Vertical distance, from stack to flame centre

yc

14.000

m

approx

Fraction Radiated Heat Allowable Radiation Safe Distance to Flame Centre

F ‫ד‬ K D

0.300 1.000 6.310 66.836

kW/m2 m

Stack To Point of Interest Flare Height

R H

60.000 37.167

m m

Uj

Fig C.3

Calculation are based on API RP 521

Flare Stack Calculation, Erwin A

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