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Tabular models

Additional equipment that are considered to be energy consumers can be specified using the keyword TABULAR. This is given that a form of reservoir rates (oil/gas production) can be linked to either fuel or power consumption.

This is considered to be a consumer energy function for pure barycentric interpolation, no extrapolation outside convex area. One column defines the function value, the rest of the columns defines the variables for a 1D (if one variable column) or multidimensional interpolation.

Header and unit requirements​

HeaderUnitComment
PowerMWFor power driven consumers
FuelSm3/dayFor fuel (turbine) driven consumers

Variable headers can be chosen freely as long as these correspond to the defined variables for the function.

Example​

1D tabular energy function​

Contents of the file energyfunc_1d_rate_fuel.csv:

RATE,     FUEL
0,        0
1,        137750
1000000,  137750
2000000,  145579
3000000,  153335
4000000,  161022
5000000,  168644

The entry in FACILITY_INPUTS:

FACILITY_INPUTS:
  - NAME: gasinjectiondata
    FILE: energyfunc_1d_rate_fuel.csv
    TYPE: TABULAR

The entry in INSTALLATIONS under a fuel consumer:

INSTALLATIONS:
  ....
    - NAME: gasinjection
      CATEGORY: COMPRESSOR
      ENERGY_USAGE_MODEL:
        TYPE: TABULATED
        ENERGYFUNCTION: gasinjectiondata
        VARIABLES:
          - NAME: RATE
            EXPRESSION: SIM1;GAS_INJ  # [Sm3/day]
Note

Note that the name RATE in the input file (under FACILITY_INPUT) and the variable name RATE under VARIABLES must be equal!

3D tabular energy function​

Contents of file energyfunc_3d_rate_ps_pd_power.csv:

     RATE, SUCTION_PRESSURE, DISCHARGE_PRESSURE,       POWER
# [Sm3/d],            [bar],              [bar],        [MW]
 1.00E+06,               10,              12.72,      0.3664
 1.00E+06,               10,              26.21,       2.293
 1.00E+06,               26,              31.36,      0.2739
 1.00E+06,               26,              70.77,        6.28
 1.00E+06,               34,              41.21,       0.368
 1.00E+06,               34,              94.24,       8.435
 1.00E+06,               78,              94.12,      0.7401
 1.00E+06,               78,              231.6,       22.46
 6.00E+06,               26,              36.93,       4.197
 6.00E+06,               26,              57.43,       7.32
 6.00E+06,               38,              46.96,       2.156
 6.00E+06,               38,              106.2,       9.557
 6.00E+06,               54,              67.26,        1.95
 6.00E+06,               54,              155.6,       14.35
 6.00E+06,               78,              94.17,       1.399
 6.00E+06,               78,              231.6,       22.46
 1.10E+07,               42,              66.92,       9.712
 1.10E+07,               42,              81.63,       11.89
 1.10E+07,               62,              75.64,       3.678
 1.10E+07,               62,              180.8,       16.94
 1.10E+07,               78,              97.79,       3.452
 1.10E+07,               78,              231.6,       22.46

The entry in FACILITY_INPUTS:

FACILITY_INPUTS:
  - NAME: booster
    FILE: energyfunc_3d_rate_ps_pd_power.csv
    TYPE: TABULAR

The entry in INSTALLATIONS under a fuel consumer (for 3-d tabular):

INSTALLATIONS:
  ...
    - NAME: gasexport
      CATEGORY: COMPRESSOR
      ENERGY_USAGE_MODEL:
        TYPE: TABULATED
        ENERGYFUNCTION: booster
        VARIABLES:
          - NAME: RATE
            EXPRESSION: SIM1;GAS_SALES  # [Sm3/day]
          - NAME: SUCTION_PRESSURE
            EXPRESSION: SIM1;SUCTION_PRESSURE {+} 3  # [bara]
          - NAME: DISCHARGE_PRESSURE
            EXPRESSION: 100  # [bara]