Optimal Design of Natural Gas Gathering Systems
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compressors. The parameters of the modified compressors are shown in Table 6. In
addition, both large regional CSs and small-scale CSs are newly constructed, the design
parameters are shown in Table 7 and Table 8 separately. Table 9 shows the design
parameter of the newly built pipelines.
Table 5. Operation parameters of built compressor station
CSs
Inlet pressure
(MPa)
Outlet pressure
(MPa)
Total power
(KW)
Configuration
(KW)
Running
numbers
2
2.55
4.51
330.95
470
1
5
1.71
4.58
1364.66
630
1
20
1.44
4.89
1057.44
630
1
21
3.63
5.03
642.96
630 630
2
22
2.63
5.19
848.56
630
1
24
3.63
5.24
1047.61
630
1
25
5.25
5.25
0.00
1250 1250
0
Table 6. Operation parameters of modified compressors in CSs.
CSs
Inlet pressure
(MPa)
Outlet pressure
(MPa)
Configuration
(KW)
The power of
modified
compressor (KW)
10 4 CNY
5
1.71
2.90
630
734.66
1132.71
20
1.44
2.38
630
427.44
755.47
22
2.63
3.15
630
218.56
498.99
24
3.63
4.20
630
417.61
743.40
Table 7. Operation parameters of newly built reginal compressor station
Station
Inlet pressure (MPa)
Outlet pressure
(MPa)
Total power (KW)
Investment cost
(10 4 CNY)
10
4.26
4.83
973.64
3102.84
18
4.68
5.99
1774.49
3825.86
The total cost of investment and operation can be seen in Table 10, which shows that
the scheme of modified CSs reduces the construction cost of the CSs and the operation
cost of the whole GGS. There is a 3.68% decrease in the total costs compared to the
design scheme without modification of the original CSs. Table 11 shows that the proposed method can better utilize the original compressors by reducing the number of idle
equipment.