Ohaji South Flare Out H&MB Report
Ohaji South Flare Out H&MB Report
OHF-NET-OHSF1-G13-00001
July, 2022
Revision Philosophy
All documents for review will be issued at R01 as required, with subsequent R02...
If the document is for information, it will also be issued as A01.
All revisions Issued for Approval/Implementation will be issued at A01, with subsequent A02, A03, etc as required
All revisions approved for design will be issued at D01, with subsequent D02, D03, etc as required.
Documents approved for Construction will be issued at C01, C02, and C03 respectively.
Documents or drawings revised as “As built” will be issued as Z01, Z02 Z03 etc.
Narrative sections revised from previous approved issues are to be noted in the table below and/or highlighted in the RH
margin (using the appropriate revision status) thus: | A02
Previous revision highlighting to be removed at subsequent issues.
Drawings/diagrams revised from previous approved issues are highlighted by 'clouding' the affected areas and by the use
of a triangle containing the revision status.
Revision History
Revision Date of issue Reason for change
No.
R01 22-Dec-21 First Issue
R02 19-Apr-22 Re-Issued for Review
A01 05-May-22 Issued for Approval
D01 27-Jul-22 Approved for Design
Attachments
Holds
The Heat and Material Balance was generated from the Hysys simulation (REF 1). It should be read in conjunction with the
PFDs (REF 2) for the corresponding stream numbers.
Cases
Two cases were assessed as part of the H&MB, The details are listed below:
Case 1 assumes that the inlet stream pressures, temperatures and compositions are as per the Process Design Basis (REF 3).
It assumes there are 3 compressor trains (2 duty, 1 standby), each capable of processing 5.1 MMSCFD of associated gas.
Name Units 1 2 3 5 6 7 9 10 11 12 13 14 16 17 18 19 21
Vapour Fraction 1.00 1.00 1.00 1.00 1.00 --- 1.00 1.00 --- 0.00 --- 1.00 1.00 1.00 1.00 1.00 0.00
Temperature C 28.00 30.00 30.00 28.96 28.00 --- 28.45 28.45 --- 28.45 --- 43.00 43.00 43.00 43.00 43.00 43.00
Pressure bar_g 0.30 1.50 3.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 125.00 125.00 125.00 125.00 125.00 125.00
Molar Flow MMSCFD 0.20 0.20 4.30 4.30 5.70 0.00 10.20 5.10 0.00 0.00 0.00 5.10 10.20 10.20 8.20 2.00 0.00
Mass Flow kg/h 203.91 203.91 3807.90 3807.90 4890.13 0.00 8901.95 4450.97 0.00 0.00 0.00 4450.97 8901.95 8901.95 7156.47 1745.48 0.00
Molecular Weight 20.47 20.47 17.78 17.78 17.22 --- 17.52 17.52 --- 17.52 --- 17.52 17.52 17.52 17.52 17.52 17.52
Mass Enthalpy kJ/kg -4360.63 -4358.07 -4667.33 -4667.33 -4697.32 --- -4676.72 -4676.72 --- -4676.71 --- -4766.04 -4766.04 -4766.04 -4766.04 -4766.04 -4766.04
Mass Heat Of Vapourisation kJ/kg 712.57 700.58 631.01 653.59 651.69 --- 661.92 661.92 --- 661.92 --- --- --- --- --- --- ---
Cp/Cv (Gamma) 1.26 1.26 1.30 1.29 1.30 --- 1.29 1.29 --- 1.29 --- 1.68 1.68 1.68 1.68 1.68 1.68
Mass Density kg/m3 1.08 2.06 3.22 1.79 1.74 --- 1.77 1.77 --- 1.77 --- 101.78 101.78 101.78 101.78 101.78 101.78
Actual Volume Flow m3/h 189.12 99.11 1183.37 2127.69 2811.67 0.00 5038.58 2519.27 0.00 0.00 0.00 43.73 87.46 87.46 70.31 17.15 0.00
Mass Lower Heating Value kJ/kg --- --- 45954.76 45954.76 47616.05 --- --- --- --- --- --- --- --- --- --- --- ---
Lower Heat Value kJ/kgmole --- --- 817065.87 817065.87 820177.21 --- --- --- --- --- --- --- --- --- --- --- ---
Wobbe Index (Gas) MJ/m3 51.77 51.77 48.96 48.96 49.96 --- 49.57 49.57 --- 49.57 --- 49.57 49.57 49.57 49.57 49.57 49.57
Vapour Phase
Actual Gas Flow ACT_m3/h 189.12 99.11 1183.37 2127.69 2811.67 --- 5038.58 2519.27 --- 0.00 --- 43.73 87.46 87.46 70.31 17.15 0.00
Std Gas Flow Nm3/h 223.27 223.27 4800.33 4800.33 6363.23 --- 11386.83 5693.41 --- 0.00 --- 5693.41 11386.83 11386.83 9154.12 2232.71 0.00
Std Gas Flow MMSCFD 0.20 0.20 4.29 4.29 5.69 --- 10.18 5.09 --- 0.00 --- 5.09 10.18 10.18 8.18 2.00 0.00
Actual Volume Flow m3/h 189.12 99.11 1183.37 2127.69 2811.67 --- 5038.58 2519.27 --- 0.00 --- 43.73 87.46 87.46 70.31 17.15 0.00
Mass Density kg/m3 1.08 2.06 3.22 1.79 1.74 --- 1.77 1.77 --- 1.77 --- 101.78 101.78 101.78 101.78 101.78 101.78
Compressibility 1.00 0.99 0.99 0.99 0.99 --- 0.99 0.99 --- 0.99 --- 0.83 0.83 0.83 0.83 0.83 0.83
Viscosity cP 0.01 0.01 0.01 0.01 0.01 --- 0.01 0.01 --- 0.01 --- 0.02 0.02 0.02 0.02 0.02 0.02
Molar Flow MMSCFD 0.20 0.20 4.30 4.30 5.70 --- 10.20 5.10 --- 0.00 --- 5.10 10.20 10.20 8.20 2.00 0.00
Mass Heat Capacity kJ/kg-C 2.01 2.02 2.13 2.12 2.17 --- 2.14 2.14 --- 2.14 --- 2.99 2.99 2.99 2.99 2.99 2.99
Thermal Conductivity W/m-K 0.03 0.03 0.03 0.03 0.03 --- 0.03 0.03 --- 0.03 --- 0.05 0.05 0.05 0.05 0.05 0.05
Liquid Phase
Actual Volume Flow m3/h --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Molar Density kgmole/m3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Viscosity cP --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Mass Heat Capacity kJ/kg-C --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Thermal Conductivity W/m-K --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Surface Tension dyne/cm --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Aqueous Liquid Phase
Actual Volume Flow m3/h --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Molar Density kgmole/m3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Viscosity cP --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Mass Heat Capacity kJ/kg-C --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Component Molar Fraction
H2S 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
CO2 0.033 0.033 0.025 0.025 0.017 --- 0.021 0.021 --- 0.021 --- 0.021 0.021 0.021 0.021 0.021 0.021
Nitrogen 0.000 0.000 0.009 0.009 0.000 --- 0.004 0.004 --- 0.004 --- 0.004 0.004 0.004 0.004 0.004 0.004
Methane 0.822 0.822 0.923 0.923 0.948 --- 0.935 0.935 --- 0.935 --- 0.935 0.935 0.935 0.935 0.935 0.935
Ethane 0.097 0.097 0.032 0.032 0.027 --- 0.030 0.030 --- 0.030 --- 0.030 0.030 0.030 0.030 0.030 0.030
Propane 0.006 0.006 0.002 0.002 0.001 --- 0.002 0.002 --- 0.002 --- 0.002 0.002 0.002 0.002 0.002 0.002
i-Butane 0.025 0.025 0.006 0.006 0.004 --- 0.005 0.005 --- 0.005 --- 0.005 0.005 0.005 0.005 0.005 0.005
n-Butane 0.003 0.003 0.001 0.001 0.001 --- 0.001 0.001 --- 0.001 --- 0.001 0.001 0.001 0.001 0.001 0.001
i-Pentane 0.012 0.012 0.003 0.003 0.002 --- 0.002 0.002 --- 0.002 --- 0.002 0.002 0.002 0.002 0.002 0.002
n-Pentane 0.001 0.001 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
n-Hexane 0.001 0.001 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
C7+* 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
C7+ (SV)* 0.001 0.001 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
H2O 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
Component Mass Fraction
H2S 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
CO2 0.071 0.071 0.061 0.061 0.043 --- 0.052 0.052 --- 0.052 --- 0.052 0.052 0.052 0.052 0.052 0.052
Nitrogen 0.000 0.000 0.014 0.014 0.000 --- 0.006 0.006 --- 0.006 --- 0.006 0.006 0.006 0.006 0.006 0.006
Methane 0.644 0.644 0.833 0.833 0.883 --- 0.856 0.856 --- 0.856 --- 0.856 0.856 0.856 0.856 0.856 0.856
Ethane 0.142 0.142 0.053 0.053 0.048 --- 0.052 0.052 --- 0.052 --- 0.052 0.052 0.052 0.052 0.052 0.052
Propane 0.013 0.013 0.004 0.004 0.004 --- 0.004 0.004 --- 0.004 --- 0.004 0.004 0.004 0.004 0.004 0.004
i-Butane 0.072 0.072 0.020 0.020 0.013 --- 0.017 0.017 --- 0.017 --- 0.017 0.017 0.017 0.017 0.017 0.017
n-Butane 0.009 0.009 0.002 0.002 0.002 --- 0.002 0.002 --- 0.002 --- 0.002 0.002 0.002 0.002 0.002 0.002
i-Pentane 0.041 0.041 0.011 0.011 0.007 --- 0.009 0.009 --- 0.009 --- 0.009 0.009 0.009 0.009 0.009 0.009
n-Pentane 0.002 0.002 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
n-Hexane 0.002 0.002 0.000 0.000 0.001 --- 0.001 0.001 --- 0.001 --- 0.001 0.001 0.001 0.001 0.001 0.001
C7+* 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
C7+ (SV)* 0.003 0.003 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
H2O 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 --- 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000
Name Units 1 2 3 5 6 7 9 10 11 12 13 14 16 17 18 19 21
Vapour Fraction 1.00 0.99 1.00 1.00 1.00 --- 1.00 1.00 0.00 0.00 0.00 1.00 1.00 1.00 1.00 1.00 0.00
Temperature C 28.00 30.00 30.00 28.96 28.00 --- 28.17 28.17 52.14 28.17 51.00 43.00 43.00 43.00 43.00 43.00 43.00
Pressure bar_g 0.30 1.50 3.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 125.00 125.00 125.00 125.00 125.00 125.00
Molar Flow MMSCFD 0.21 0.21 4.34 4.34 5.79 0.00 10.33 5.17 0.10 0.00 0.12 5.12 10.23 10.21 8.21 2.00 0.02
Mass Flow kg/h 209.17 209.17 3844.67 3844.67 4967.75 0.00 9021.60 4510.80 90.40 0.00 109.68 4465.60 8931.19 8911.92 7166.39 1745.53 19.28
Molecular Weight 20.40 20.40 17.78 17.78 17.24 --- 17.53 17.53 18.02 18.02 18.02 17.52 17.52 17.52 17.52 17.52 18.03
Mass Enthalpy kJ/kg -4588.42 -4611.55 -4751.03 -4751.03 -4833.63 --- -4793.28 -4793.28 -15767.78 -15873.57 -15771.74 -4799.70 -4799.70 -4775.92 -4775.92 -4775.92 -15790.30
Mass Heat Of Vapourisation kJ/kg 900.57 892.87 827.55 844.43 886.87 --- 869.74 869.74 2483.50 2214.02 2645.72 404.49 404.49 329.79 329.79 329.79 1183.02
Cp/Cv (Gamma) 1.26 1.26 1.30 1.29 1.30 --- 1.30 1.30 1.16 1.15 1.01 1.68 1.68 1.69 1.69 1.69 1.15
Mass Density kg/m3 1.07 2.08 3.22 1.79 1.74 --- 1.77 1.77 986.69 847.39 986.87 102.01 102.01 101.81 101.81 101.81 997.83
Actual Volume Flow m3/h 194.66 100.80 1194.58 2147.87 2854.22 0.00 5099.41 2549.69 0.09 0.00 0.11 43.78 87.56 87.54 70.39 17.15 0.02
Mass Lower Heating Value kJ/kg --- --- 45515.29 45515.29 46872.01 --- --- --- 0.03 0.00 0.03 --- --- --- --- --- 0.06
Lower Heat Value kJ/kgmole --- --- 809353.20 809353.20 807915.16 --- --- --- 0.52 0.01 0.61 --- --- --- --- --- 1.01
Wobbe Index (Gas) MJ/m3 50.46 50.46 48.53 48.53 49.24 --- 48.96 48.96 2.45 2.45 2.45 49.42 49.42 49.52 49.52 49.52 2.45
Vapour Phase
Actual Gas Flow ACT_m3/h 194.66 100.80 1194.58 2147.87 2854.22 --- 5099.41 2549.69 --- 0.00 0.00 43.77 87.54 87.54 70.39 17.15 0.00
Std Gas Flow Nm3/h 229.82 227.09 4846.07 4846.07 6459.81 --- 11535.70 5767.85 --- 0.00 0.00 5699.64 11399.28 11399.28 9166.57 2232.71 0.00
Std Gas Flow MMSCFD 0.21 0.20 4.33 4.33 5.78 --- 10.31 5.16 --- 0.00 0.00 5.10 10.19 10.19 8.20 2.00 0.00
Actual Volume Flow m3/h 194.66 100.80 1194.58 2147.87 2854.22 --- 5099.41 2549.69 --- 0.00 0.00 43.77 87.54 87.54 70.39 17.15 0.00
Mass Density kg/m3 1.07 2.05 3.22 1.79 1.74 --- 1.77 1.77 --- 1.77 2.40 101.81 101.81 101.81 101.81 101.81 101.81
Compressibility 1.00 0.99 0.99 0.99 0.99 --- 0.99 0.99 --- 0.99 0.99 0.83 0.83 0.83 0.83 0.83 0.83
Viscosity cP 0.01 0.01 0.01 0.01 0.01 --- 0.01 0.01 --- 0.01 0.01 0.02 0.02 0.02 0.02 0.02 0.02
Molar Flow MMSCFD 0.21 0.20 4.34 4.34 5.79 --- 10.33 5.17 --- 0.00 0.00 5.11 10.21 10.21 8.21 2.00 0.00
Mass Heat Capacity kJ/kg-C 2.01 2.02 2.13 2.12 2.16 --- 2.14 2.14 --- 2.14 1.45 2.99 2.99 2.99 2.99 2.99 2.99
Thermal Conductivity W/m-K 0.03 0.03 0.03 0.03 0.03 --- 0.03 0.03 --- 0.03 0.03 0.05 0.05 0.05 0.05 0.05 0.05
Liquid Phase
Actual Volume Flow m3/h --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Molar Density kgmole/m3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Viscosity cP --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Mass Heat Capacity kJ/kg-C --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Thermal Conductivity W/m-K --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Surface Tension dyne/cm --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Aqueous Liquid Phase
Actual Volume Flow m3/h --- 0.00 --- --- --- --- --- 0.00 0.09 0.00 0.11 0.01 0.02 0.00 0.00 0.00 0.02
Molar Density kgmole/m3 --- 55.71 --- --- --- --- --- 47.04 54.76 47.04 54.80 55.35 55.35 55.35 55.35 55.35 55.35
Viscosity cP --- 0.80 --- --- --- --- --- 0.83 0.52 0.83 0.54 0.62 0.62 0.62 0.62 0.62 0.62
Mass Heat Capacity kJ/kg-C --- 4.31 --- --- --- --- --- 4.31 4.32 4.31 4.32 4.30 4.30 4.30 4.30 4.30 4.30
Component Molar Fraction
H2S 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
CO2 0.032 0.032 0.024 0.024 0.017 --- 0.020 0.020 0.000 0.000 0.000 0.020 0.020 0.020 0.020 0.020 0.000
Nitrogen 0.000 0.000 0.009 0.009 0.000 --- 0.004 0.004 0.000 0.000 0.000 0.004 0.004 0.004 0.004 0.004 0.000
Methane 0.798 0.798 0.915 0.915 0.934 --- 0.923 0.923 0.000 0.000 0.000 0.932 0.932 0.934 0.934 0.934 0.000
Ethane 0.094 0.094 0.031 0.031 0.027 --- 0.030 0.030 0.000 0.000 0.000 0.030 0.030 0.030 0.030 0.030 0.000
Propane 0.006 0.006 0.002 0.002 0.001 --- 0.002 0.002 0.000 0.000 0.000 0.002 0.002 0.002 0.002 0.002 0.000
i-Butane 0.025 0.025 0.006 0.006 0.004 --- 0.005 0.005 0.000 0.000 0.000 0.005 0.005 0.005 0.005 0.005 0.000
n-Butane 0.003 0.003 0.001 0.001 0.000 --- 0.001 0.001 0.000 0.000 0.000 0.001 0.001 0.001 0.001 0.001 0.000
i-Pentane 0.011 0.011 0.003 0.003 0.002 --- 0.002 0.002 0.000 0.000 0.000 0.002 0.002 0.002 0.002 0.002 0.000
n-Pentane 0.001 0.001 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
n-Hexane 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
C7+* 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
C7+ (SV)* 0.001 0.001 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
H2O 0.028 0.028 0.009 0.009 0.015 --- 0.013 0.013 1.000 1.000 1.000 0.003 0.003 0.001 0.001 0.001 1.000
Component Mass Fraction
H2S 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
CO2 0.070 0.070 0.061 0.061 0.043 --- 0.051 0.051 0.000 0.000 0.001 0.051 0.051 0.051 0.051 0.051 0.001
Nitrogen 0.000 0.000 0.014 0.014 0.000 --- 0.006 0.006 0.000 0.000 0.000 0.006 0.006 0.006 0.006 0.006 0.000
Methane 0.628 0.628 0.825 0.825 0.869 --- 0.845 0.845 0.000 0.000 0.000 0.853 0.853 0.855 0.855 0.855 0.000
Ethane 0.139 0.139 0.053 0.053 0.047 --- 0.052 0.052 0.000 0.000 0.000 0.052 0.052 0.052 0.052 0.052 0.000
Propane 0.013 0.013 0.004 0.004 0.004 --- 0.004 0.004 0.000 0.000 0.000 0.004 0.004 0.004 0.004 0.004 0.000
i-Butane 0.070 0.070 0.020 0.020 0.013 --- 0.017 0.017 0.000 0.000 0.000 0.017 0.017 0.017 0.017 0.017 0.000
n-Butane 0.009 0.009 0.002 0.002 0.002 --- 0.002 0.002 0.000 0.000 0.000 0.002 0.002 0.002 0.002 0.002 0.000
i-Pentane 0.040 0.040 0.011 0.011 0.007 --- 0.009 0.009 0.000 0.000 0.000 0.009 0.009 0.009 0.009 0.009 0.000
n-Pentane 0.002 0.002 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
n-Hexane 0.002 0.002 0.000 0.000 0.000 --- 0.001 0.001 0.000 0.000 0.000 0.001 0.001 0.001 0.001 0.001 0.000
C7+* 0.000 0.000 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
C7+ (SV)* 0.003 0.003 0.000 0.000 0.000 --- 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
H2O 0.025 0.025 0.010 0.010 0.016 --- 0.013 0.013 1.000 1.000 0.999 0.003 0.003 0.001 0.001 0.001 0.999