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    Process Calculation: Flare Diameter (D)

    Uploaded by

    kristian08
    This document contains calculations to size a flare stack based on process data including a flow rate of 29,641 kg/h of hydrocarbon vapor. It determines that the inside diameter of the flare should be 0.22 m, the center of the flame will be 2.54 m from the tip and 12.76 m above the tip, and the required height of the flare stack is 38.97 m. It also provides the predicted radiation levels at increasing distances from the base of the flare.

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    © All Rights Reserved
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    Process Calculation: Flare Diameter (D)

    Uploaded by

    kristian08
    251 views2 pages
    This document contains calculations to size a flare stack based on process data including a flow rate of 29,641 kg/h of hydrocarbon vapor. It determines that the inside diameter of the flare should be 0.22 m, the center of the flame will be 2.54 m from the tip and 12.76 m above the tip, and the required height of the flare stack is 38.97 m. It also provides the predicted radiation levels at increasing distances from the base of the flare.

    Original Description:

    kalkulasi flare_BS_SI

    Original Title

    BS_Flare Calculation_SI

    Copyright

    © © All Rights Reserved

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    This document contains calculations to size a flare stack based on process data including a flow rate of 29,641 kg/h of hydrocarbon vapor. It determines that the inside diameter of the flare should be 0.22 m, the center of the flame will be 2.54 m from the tip and 12.76 m above the tip, and the required height of the flare stack is 38.97 m. It also provides the predicted radiation levels at increasing distances from the base of the flare.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    251 views2 pages

    Process Calculation: Flare Diameter (D)

    Uploaded by

    kristian08
    This document contains calculations to size a flare stack based on process data including a flow rate of 29,641 kg/h of hydrocarbon vapor. It determines that the inside diameter of the flare should be 0.22 m, the center of the flame will be 2.54 m from the tip and 12.76 m above the tip, and the required height of the flare stack is 38.97 m. It also provides the predicted radiation levels at increasing distances from the base of the flare.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    PROCESS CALCULATION

    Company Name Date:


    Project Name

    Rev.
    Objectives Flare Sizing

    1 Process Data
    2 Material Flowing In Stack HC Vapor
    3 Flow Rate, W 29,641 kg/h
    4 Average Molecular Weight 16.6
    5 Relative Molecular Mass of Air 28.8
    6 Flowing Pressure At The Flare Tip, P 101.3 kPa
    7 Pressure drop at Flare Tip, delta P 14.0 kPa
    8 Flowing Temperature, T 303 K
    9 Ambient Air Temperature, Ta 303 K
    10 Compressibility factor, Z 1.0
    11 Heat Of Combustion, Hc 68,257 kJ/kg
    12 Design Mach Number For Flare 0.7
    13 Design Wind Velocity, U 5.0 m/s
    14 Fraction Of Heat Radiated, F 0.3
    15 Fraction Of Heat Intensity Transmitted, Tau 1
    16 Max Allowable Radiation, K, at Dist R 5.0 kW/m2
    17 Distance, R, To Max Allowable Radiation - m note-1
    18 Relative Humidity 50%
    19 Lower Explosive Limit, CL, 0.05
    20 Calculation
    21 Flare Diameter (d) 0.22 m (inside diameter)
    22
    23
    24
    25 Location of Flame Centre
    26 Isothermal Sonic Velocity 389.52 m/s
    27 Flare tip velocity, uj 272.66 m/s
    28 Lower Explosive Limit Concentration, CL 1.57
    29 Parameter for Jet Thrust & Wind Thrust, dj.R 49.98
    30 Xc 2.54 m figure C.3
    31 Yc 12.76 m figure C.5
    32
    33 Calculation of The Distance from The Flame Center to The Receptor Point
    34 Heat Liberated, Q 5.62E+05 kW
    35 Minimum Distance from the flame centre 51.80 m
    36
    37 Calculate Required Flare Stack Height
    38 R' -2.54 m
    39 h' 51.74 m
    40 Height of Stack, H 38.97 m
    41 39.04 m note-1
    42
    43
    44 Note
    45 1. Jika jarak yang diperbolehkan untuk terpapar radiasi maksimum yang diijinkan maka tinggi stack = D-Yc
    46
    47
    48
    49
    50
    PROCESS CALCULATION
    Company Name 0 Date:
    Project Name 0
    1/0/1900
    Rev.
    Objectives Flare Sizing (Continued)
    0

    1 SKETCH
    2
    3
    4 dX = 5.08 m
    5
    6
    7
    8
    9 dY = 25.53 m
    10 Yc =
    11 12.76 m
    12
    13 Xc =
    14 2.54 m
    15 D = 51.8 m
    16 H= d= h' = 51.74 m
    17 38.97 m 0.22 m
    18
    19
    20
    21
    22 R' = -2.54 m
    23
    24 R= 0m
    25
    26
    27 RESULT
    28 Diameter of Flare, d 0.22 m
    29 9 in
    30 Center of Flame (Xc,Yc) Co-ordinates
    31 Xc Co-ordinate from Tip 2.54 m
    32 Yc Co-ordinate from Tip 12.76 m
    33 Flare Stack Height, H 38.97 m
    34
    35 Distance From Base Of Flare Radiation
    2
    36 (m) kW/m
    37 0 5.00
    38 50 2.72
    39 100 1.10
    40 150 0.55
    41 200 0.32
    42 250 0.21
    43 300 0.15
    44 350 0.11
    45 400 0.08
    46 450 0.07
    47 500 0.05
    48
    49
    50

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