Pump models in calculations

Pump charts are defined in the FACILITY_INPUTS section, and is then referred to from an ENERGY_USAGE_MODEL.

PUMP energy usage model

To configure a single pump, the pump rate, suction- and discharge pressures and fluid density must be given as inputs. In addition, a reference to a pump chart defined in the FACILITY_INPUTS section has to be included.

Format

ENERGY_USAGE_MODEL:
  TYPE: PUMP
  CONDITION: <condition expression>
  ENERGYFUNCTION: <reference energy function in facility inputs of pump type>
  RATE: <rate expression>
  SUCTION_PRESSURE: <suction pressure expression>
  DISCHARGE_PRESSURE: <discharge pressure expression>
  FLUID_DENSITY: <fluid density expression>

Example

ENERGY_USAGE_MODEL:
  TYPE: PUMP
  ENERGYFUNCTION: waterinjection_pump_reference
  RATE: SIM1;WATER_INJ
  SUCTION_PRESSURE: 3
  DISCHARGE_PRESSURE: 200
  FLUID_DENSITY: 1000

Units

Quantity	Default units
RATE	Sm3/day
SUCTION_PRESSURE	bara
DISCHARGE_PRESSURE	bara
FLUID_DENSITY	kg/m3

PUMP_SYSTEM energy usage model

Model a system of pumps that share common manifolds and have cross-overs between them and for which the rate may be split between them based on various operational strategies.

Format

ENERGY_USAGE_MODEL:
  TYPE: PUMP_SYSTEM
  CONDITION: <condition expression>
  PUMPS:
    - NAME: <name of compressor>
      CHART: <reference to pump model in facility inputs>
  TOTAL_SYSTEM_RATE: <expression defining the total rate in the system>
  FLUID_DENSITY: <expression defining the fluid density>
  OPERATIONAL_SETTINGS:
    <operational settings data>

warning

If all OPERATIONAL_SETTINGS have been exhausted, and there were still some time steps that were outside the capacity of the operational setting, the last operational setting will be "chosen" nevertheless. In this case the energy_usage in the output will be set to NaN which indicates that the operational setting, is in fact, invalid (or converted to 0 when aggregating upwards to e.g. genset)

Example

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: 1000.0
  OPERATIONAL_SETTINGS:
    - RATE_FRACTIONS: [1, 0]
      SUCTION_PRESSURE: 3
      DISCHARGE_PRESSURE: 200
    - RATE_FRACTIONS: [0.5, 0.5]
      SUCTION_PRESSURE: 3
      DISCHARGE_PRESSURE: 200

Units

Quantity	Default units
RATE	Sm3/day
SUCTION_PRESSURE	bara
DISCHARGE_PRESSURE	bara
FLUID_DENSITY	kg/m3