OPERATIONAL_SETTINGS

INSTALLATIONS / [...] / ENERGY_USAGE_MODEL / OPERATIONAL_SETTINGS

Description

Used to define the operational settings in an ENERGY_USAGE_MODEL of type PUMP_SYSTEM or COMPRESSOR_SYSTEM.

The rate [Sm³/day] through each consumer in the system may be specified in two different ways, either directly using RATES, or by defining the rate fraction<RATE_FRACTIONS> for each consumer which is then multiplied with the total system rate<TOTAL_SYSTEM_RATE>.

The suction pressure may either be specified with SUCTION_PRESSURE which will then be the common suction pressure for all consumers in the system. Alternatively, SUCTION_PRESSURES may be used to specify one suction pressure expression per consumer.

The discharge pressure may either be specified with DISCHARGE_PRESSURE which will then be the common discharge pressure for all consumers in the system. Alternatively, DISCHARGE_PRESSURES may be used to specify one discharge pressure expression per consumer.

CROSSOVER may be used to specify if there are any available cross-overs between the consumers in this operational setting.

FLUID_DENSITIES may be used for pump systems to specify one fluid density expression per pump.

For all keywords where there is one expression per consumer, RATES, RATE_FRACTIONS, SUCTION_PRESSURES, DISCHARGE_PRESSURES and FLUID_DENSITIES, the expressions must be entered in a list where the number of elements is equal to the number of compressors<COMPRESSORS>/pumps<PUMPS>

RATES

A list with one expression per consumer specifying the rate [Sm³/day] for each consumer. Use either RATES or RATE_FRACTIONS, not both in one operational setting.

RATE_FRACTIONS

A list with one expression per consumer specifying the rate fraction for each consumer. If this is used, TOTAL_SYSTEM_RATE for the ENERGY_USAGE_MODEL is also required. Use either RATES or RATE_FRACTIONS, not both in one operational setting.

SUCTION_PRESSURES

A list with one expression per consumer specifying the suction pressure for each consumer. Use either SUCTION_PRESSURES or SUCTION_PRESSURE, not both in the same operational setting.

Use SUCTION_PRESSURE to set the same suction pressure for all consumers in the system and SUCTION_PRESSURES to specify one suction pressure expression per consumer.

DISCHARGE_PRESSURES

A list with one expression per consumer specifying the discharge pressure for each consumer. Use either DISCHARGE_PRESSURES or DISCHARGE_PRESSURE, not both in the same operational setting.

Use DISCHARGE_PRESSURE to set the same discharge pressure for all consumers in the system and DISCHARGE_PRESSURES to specify one discharge pressure expression per consumer.

FLUID_DENSITIES

Only supported for energy usage models<ENERGY_USAGE_MODEL> of type PUMP_SYSTEM. A list with one expression per consumer specifying the fluid density for each consumer. If used, it will over-ride FLUID_DENSITY for the PUMP_SYSTEM.

Use FLUID_DENSITY for the energy usage models<ENERGY_USAGE_MODEL> to set one fixed fluid density for the entire system for all operational settings. Use FLUID_DENSITIES for the operational setting<OPERATIONAL_SETTINGS> to vary the fluid density between consumers and operational settings.

CROSSOVER

CROSSOVER specifies if rates are to be crossed over to another consumer if rate capacity is exceeded. If the energy consumption calculation is not successful for a consumer, and the consumer has a valid cross-over defined, the consumer will be allocated its maximum rate and the exceeding rate will be added to the cross-over consumer. To avoid loops, a consumer can only be either receiving or giving away rate. For a cross-over to be valid, the discharge pressure at the consumer "receiving" overshooting rate must be higher than or equal to the discharge pressure of the "sending" consumer. This is because it is possible to choke pressure down to meet the outlet pressure in a flow line with lower pressure, but not possible to "pressure up" in the crossover flow line. Some examples show how the crossover logic works:

Crossover is given as and list of integer values for the first position is the first consumer, second position is the second consumer, etc. The number specifies which consumer to send cross-over flow to, and 0 signifies no cross-over possible. Note that we use 1-index here.

Example 1:

Two consumers where there is a cross-over such that if the rate for the first consumer exceeds its capacity, the excess rate will be processed by the second consumer. The second consumer can not cross-over to anyone.

CROSSOVER: [2, 0]

Example 2:

The first and second consumers may both send exceeding rate to the third consumer if their capacity is exceeded.

CROSSOVER: [3,3,0]

Format

Example

ENERGY_USAGE_MODEL:
  TYPE: COMPRESSOR_SYSTEM
  COMPRESSORS:
    - NAME: export_compressor1
      COMPRESSOR_MODEL: export_compressor_reference
    - NAME: export_compressor2
      COMPRESSOR_MODEL: export_compressor_reference
    - NAME: injection_compressor
      COMPRESSOR_MODEL: injection_compressor_reference
  TOTAL_SYSTEM_RATE: SIM1;GAS_PROD {+} SIM1;GAS_LIFT
  OPERATIONAL_SETTINGS:
    - RATES:
        - SIM1;GAS_SALES
        - 0
        - SIM1;GAS_INJ
      SUCTION_PRESSURE: 50
      DISCHARGE_PRESSURES:
        - 150
        - 150
        - SIM1;INJ_PRESSURE
    - RATES:
        - SIM1;GAS_SALES {/} 2
        - SIM1;GAS_SALES {/} 2
        - SIM1;GAS_INJ
      SUCTION_PRESSURE: 50
      DISCHARGE_PRESSURES:
        - 150
        - 150
        - SIM1;INJ_PRESSURE
      CROSSOVER: [3, 3, 0]

ENERGY_USAGE_MODEL:
  TYPE: PUMP_SYSTEM
  PUMPS:
    - NAME: pump1
      CHART: water_injection_pump_reference
    - NAME: pump2
      CHART: water_injection_pump_reference
  TOTAL_SYSTEM_RATE: SIM1;WATER_INJ
  FLUID_DENSITY: (1000 {*} SIM1;WATER_PROD {+} 1050 {*} SIM2;WATER_PROD) {/} (SIM1;WATER_PROD {+} SIM2;WATER_PROD)
  OPERATIONAL_SETTINGS:
    - RATE_FRACTIONS: [1, 0]
      SUCTION_PRESSURE: 3
      DISCHARGE_PRESSURE: 200
    - RATE_FRACTIONS: [0.5, 0.5]
      SUCTION_PRESSURE: 3
      DISCHARGE_PRESSURE: 200
      FLUID_DENSITIES:
        - 1000
        - 1050