Class EjectorCapacityStrategy

java.lang.Object
neqsim.process.equipment.capacity.EjectorCapacityStrategy
All Implemented Interfaces:
EquipmentCapacityStrategy
public class EjectorCapacityStrategy extends Object implements EquipmentCapacityStrategy
Capacity strategy for ejector equipment.

This strategy evaluates ejector capacity based on multiple constraints including:

  • Entrainment ratio (suction/motive flow)
  • Motive flow rate limits
  • Suction pressure limits
  • Discharge pressure limits
  • Isentropic efficiency
Version:
1.0
Author:
NeqSim Development Team

  • Field Details

    • DEFAULT_MAX_ENTRAINMENT_RATIO

      public static final double DEFAULT_MAX_ENTRAINMENT_RATIO
      Default maximum entrainment ratio.
      See Also:

    • DEFAULT_MIN_SUCTION_PRESSURE

      public static final double DEFAULT_MIN_SUCTION_PRESSURE
      Default minimum suction pressure (bara).
      See Also:

    • DEFAULT_MAX_MOTIVE_FLOW

      public static final double DEFAULT_MAX_MOTIVE_FLOW
      Default maximum motive flow rate (kg/hr).
      See Also:

    • maxEntrainmentRatio

      private double maxEntrainmentRatio

    • minSuctionPressure

      private double minSuctionPressure

    • maxMotiveFlowRate

      private double maxMotiveFlowRate

  • Constructor Details

    • EjectorCapacityStrategy

      public EjectorCapacityStrategy()
      Default constructor.

    • EjectorCapacityStrategy

      public EjectorCapacityStrategy(double maxEntrainmentRatio, double minSuctionPressure, double maxMotiveFlowRate)
      Constructor with custom constraints.
      Parameters:
      maxEntrainmentRatio - maximum entrainment ratio
      minSuctionPressure - minimum suction pressure in bara
      maxMotiveFlowRate - maximum motive flow rate in kg/hr

  • Method Details

    • supports

      public boolean supports(ProcessEquipmentInterface equipment)
      Checks if this strategy supports the given equipment.
      Specified by:
      supports in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to check
      Returns:
      true if this strategy can evaluate the equipment

    • getPriority

      public int getPriority()
      Gets the priority of this strategy.

      When multiple strategies support the same equipment, the one with higher priority is used. Default priority is 0. Use positive values for more specific strategies.

      Specified by:
      getPriority in interface EquipmentCapacityStrategy
      Returns:
      the priority value (higher = more preferred)

    • getName

      public String getName()
      Gets a descriptive name for this strategy.
      Specified by:
      getName in interface EquipmentCapacityStrategy
      Returns:
      strategy name

    • getEquipmentClass

      public Class<? extends ProcessEquipmentInterface> getEquipmentClass()
      Gets the equipment class this strategy handles.
      Specified by:
      getEquipmentClass in interface EquipmentCapacityStrategy
      Returns:
      the equipment class

    • evaluateCapacity

      public double evaluateCapacity(ProcessEquipmentInterface equipment)
      Evaluates the current capacity utilization of the equipment.

      Returns a value between 0 and 1+ where:

      • 0.0 = no load
      • 1.0 = at design capacity
      • >1.0 = over capacity
      Specified by:
      evaluateCapacity in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to evaluate
      Returns:
      capacity utilization as a fraction

    • evaluateMaxCapacity

      public double evaluateMaxCapacity(ProcessEquipmentInterface equipment)
      Evaluates the maximum capacity of the equipment.

      Returns the maximum capacity in the equipment's natural units (e.g., flow rate, power, duty).

      Specified by:
      evaluateMaxCapacity in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to evaluate
      Returns:
      maximum capacity

    • getConstraints

      public Map<String, CapacityConstraint> getConstraints(ProcessEquipmentInterface equipment)
      Gets all capacity constraints for this equipment.

      Returns a map of constraint name to constraint object. The constraints include both the current value and the design/limit values.

      Specified by:
      getConstraints in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to get constraints for
      Returns:
      map of constraint name to CapacityConstraint

    • getViolations

      public List<CapacityConstraint> getViolations(ProcessEquipmentInterface equipment)
      Gets the list of constraint violations for this equipment.

      Returns only the constraints that are currently violated (utilization > 1.0 or outside limits).

      Specified by:
      getViolations in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to check
      Returns:
      list of violated constraints

    • getBottleneckConstraint

      public CapacityConstraint getBottleneckConstraint(ProcessEquipmentInterface equipment)
      Gets the bottleneck constraint (highest utilization).
      Specified by:
      getBottleneckConstraint in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to evaluate
      Returns:
      the constraint with highest utilization, or null if none

    • isWithinHardLimits

      public boolean isWithinHardLimits(ProcessEquipmentInterface equipment)
      Checks if the equipment is operating within all hard limits.
      Specified by:
      isWithinHardLimits in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to check
      Returns:
      true if no hard limits are violated

    • isWithinSoftLimits

      public boolean isWithinSoftLimits(ProcessEquipmentInterface equipment)
      Checks if the equipment is operating within all soft limits (design values).
      Specified by:
      isWithinSoftLimits in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to check
      Returns:
      true if no soft limits are violated

    • getAvailableMargin

      public double getAvailableMargin(ProcessEquipmentInterface equipment)
      Gets the available margin before hitting the bottleneck constraint.
      Specified by:
      getAvailableMargin in interface EquipmentCapacityStrategy
      Parameters:
      equipment - the equipment to evaluate
      Returns:
      available margin as a fraction (0.2 = 20% headroom)

    • setMaxEntrainmentRatio

      public void setMaxEntrainmentRatio(double maxEntrainmentRatio)
      Sets the maximum entrainment ratio.
      Parameters:
      maxEntrainmentRatio - the maximum entrainment ratio

    • setMinSuctionPressure

      public void setMinSuctionPressure(double minSuctionPressure)
      Sets the minimum suction pressure.
      Parameters:
      minSuctionPressure - the minimum suction pressure in bara

    • setMaxMotiveFlowRate

      public void setMaxMotiveFlowRate(double maxMotiveFlowRate)
      Sets the maximum motive flow rate.
      Parameters:
      maxMotiveFlowRate - the maximum motive flow rate in kg/hr