UMUECHEM BOOSTER COMPRESSOR SELECTION AND SIZING - BASE CASE - FIRST STAGE
A. PROCESS PARAMETERS: STAGE CALCULATIONS
Discharge Pressure Stage Specific Power
DESCRIPTION SUCTION DISCHARGE Stage Suction Pressure (ps) Suction Pressure (ps)- Discharge Pressure
Pressure Ratio - r Disch. Temp (Td) Absorbed (from chart
Stage Shaft Absorbed
2nd formular (pd) (pd)-2nd formular Power (KW)
1.2.3-4b)
1 Flow Rates 1 3.300 3.431 11.942 11.998 3.636 348.442 0.700 494.768
SYMBOL VALUE SYMBOL VALUE
Standard MMscf/d 6.9 6.9
Standard m3/h 8139.86 8139.86
Standard m3/s qs(st) 2.26 qd(st) 2.26
COMPRESSOR POWER [kW]
2 Pressures (Bar) Total Shaft Power (Including 5% for data inacuracies) 519.51
Gauge 2.5 10.2 Total Driver Power (Including 4% for transmission losses) 540.29
Absolute Ps 3.5 Pd 11.2
GAS ENGINE DERATING
3 Temperatures Altitude (-3.5% ISO for every 300 m above 150 m) Sea Level 0.00
Shell Petroleum Development Company of Nigeria
C
o
39.6 137.8 Temperature (-1.8% ISO for every 50C above 300C) 4.68% 565.57
K Ts 312.6 Td 410.8
4 Compressibility Factor Stage Polytropic Head [Hp] 214.29
Z Zs 0.9892 Zd 0.9871 No. of Impellers 7.14
Av. Comp. Fac Zav 0.9521
Polytropic Eff. (table
5 1.2.3-1)
Minimum np 0.800 NOTES
Maximum np 1.000 1 The calculations here presented are done in line with procedure outlined
Average np 0.900 in Production Handbook Vol. 9, Chapter 1, Section 1.2.3,
pages1-89 to 1-107.
Adiabatic exponent
6 for gas (Cp/Cv)
Minimum Cp/Cv 1.220 2 Indicates selected option in line with guidelines as stated
Maximun Cp/Cv 1.250 in Production Handbook.
Average k 1.235 3 Indicates Manual data input.
Polytropic exponent
7 for gas n 1.268
n-1 0.268
n/(n-1) 4.730
(n-1)/n 0.211
B. GENERAL CALCULATIONS
1 Actual Vol. [m3/s] qs 0.702 qd 0.288
2 Actual press. (bar)
ps1(large) 3.431 pdN (large) 11.592
ps1(small) 3.300 pdN (small) 11.550
Calculation Spreadsheet
Overall pressure ratio
3 (pdN/ps1) ro 3.51
4 Max. Stage Ratio rs 3.64
No. of Stages
5 (Logro/Logrs) Q 0.97 Nearest Whole No. 1
Theoretical Stage
6 Press. Ratio rQ 3.51
AGS-TEF-OTU-M14-00001-000 1 of 2 Mechanical Datasheet Otumara Main Compressor Package
UMUECHEM BOOSTER COMPRESSOR SELECTION AND SIZING - BASE CASE - SECOND STAGE
A. PROCESS PARAMETERS: STAGE CALCULATIONS
Discharge Pressure Stage Specific Power
DESCRIPTION SUCTION DISCHARGE Stage Suction Pressure (ps) Suction Pressure (ps)- Discharge Pressure
Pressure Ratio - r Disch. Temp (Td) Absorbed (from Chart
Stage Shaft Absorbed
2nd formular (pd) (pd)-2nd formular Power (KW)
1.2.3-4a)
1 Flow Rates: 1 10.800 10.784 18.126 18.398 1.706 286.969 0.255 525.301
SYMBOL VALUE SYMBOL VALUE
Standard MMscf/d 19.9 19.9
Standard m3/h 23475.84 23475.84
Standard m3/s qs(st) 6.52 qd(st) 6.52
COMPRESSOR POWER [kW]
2 Pressures (Bar) Total Shaft Power (Including 5% for data inacuracies) 551.57
Gauge 10 16.2 Total Driver Power (Including 4% for transmission losses) 573.63
Absolute Ps 11 Pd 17.2
GAS ENGINE DERATING
3 Temperatures Altitude (-3.5% ISO for every 300 m above 150 m) Sea Level 0.00
C
o
42.9 81.6 Temperature (-1.8% ISO for every 50C above 300C) 4.68% 600.47
Shell Petroleum Development Company of Nigeria
K Ts 315.9 Td 354.6
Compressibility
4 Factors
Z Zs 0.9705 Zd 0.9694
Av. Comp. Fac Zav 0.9400
Polytropic Efficiency
5 (table 1.2.3-1)
Minimum np 0.50 NOTES
Maximum np 1.00 1 The calculations here presented are done in line with procedure outlined
Average np 0.75 in Production Handbook Vol. 9, Chapter 1, Section 1.2.3,
pages1-89 to 1-107.
Adiabatic exponent Indicates Manual data input.
6 for gas (Cp/Cv) 2
Minimum Cp/Cv 1.270 3 Indicates selected option in line with guidelines as stated
Maximun Cp/Cv 1.280 in Production Handbook.
Average k 1.275
Polytropic exponent
7 for gas n 1.40
n-1 0.40
n/(n-1) 3.48
(n-1)/n 0.29
B. GENERAL CALCULATIONS
1 Actual Vol. [m3/s] qs 0.639 qd 0.458
2 Actual press. (bar)
ps1(small) 10.784 pdN (large) 17.802
ps1(large) 10.800 pdN (small) 17.550
Calculation Spreadsheet
Overall pressure ratio
3 (pdN/ps1) ro 1.65
4 Max. Stage Ratio rs 1.71
Number of Stages
5 (Logro/Logrs) Q 0.93 Nearest Whole No. 1
Theoretical Stage
6 Press. Ratio rQ 1.65
AGS-TEF-OTU-M14-00001-000 2 of 2 Mechanical Datasheet Otumara Main Compressor Package
