Class Ejector

java.lang.Object
neqsim.util.NamedBaseClass
neqsim.process.SimulationBaseClass
neqsim.process.equipment.ProcessEquipmentBaseClass
neqsim.process.equipment.ejector.Ejector
All Implemented Interfaces:
Serializable, Runnable, AutoSizeable, CapacityConstrainedEquipment, ProcessEquipmentInterface, ProcessElementInterface, SimulationInterface, NamedInterface
public class Ejector extends ProcessEquipmentBaseClass implements AutoSizeable, CapacityConstrainedEquipment
Ejector class represents an ejector in a process simulation. It mixes a motive stream with a suction stream and calculates the resulting mixed stream using a quasi one-dimensional formulation. The implementation combines energy and momentum balances commonly used in steam-jet ejector design as summarised by Keenan et al. (1950) and ESDU 86030.

Supports both constant-pressure mixing (CPM) and constant-area mixing (CAM) models, and calculates critical back pressure, Mach numbers, and area ratios needed for vendor-style ejector sizing (e.g. Transvac, Croll Reynolds, Schutte & Koerting). The CPM model is the standard method used by most ejector vendors including Transvac for gas-gas and steam ejector design.

The ejector implements AutoSizeable for automatic sizing based on flow conditions and CapacityConstrainedEquipment for capacity analysis with constraints for entrainment ratio, compression ratio, and critical back pressure.

Key Transvac-style parameters accessible after run():

  • Entrainment ratio (ER) = suction mass flow / motive mass flow
  • Compression ratio (CR) = discharge pressure / suction pressure
  • Expansion ratio = motive pressure / discharge pressure
  • Critical back pressure = max discharge pressure before ejector breaks down
  • Area ratio = mixing section area / motive nozzle throat area
  • Mach numbers at nozzle exit, suction, and mixing section
Version:
2.0
Author:
esol
See Also:

  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      Serialization version UID.
      See Also:

    • logger

      private static final org.apache.logging.log4j.Logger logger

    • motiveStream

      private StreamInterface motiveStream

    • suctionStream

      private StreamInterface suctionStream

    • mixedStream

      private StreamInterface mixedStream

    • dischargePressure

      private double dischargePressure

    • mixingPressure

      private double mixingPressure

    • efficiencyIsentropic

      private double efficiencyIsentropic

    • suctionNozzleEfficiency

      private double suctionNozzleEfficiency

    • mixingEfficiency

      private double mixingEfficiency

    • diffuserEfficiency

      private double diffuserEfficiency

    • designSuctionVelocity

      private double designSuctionVelocity

    • designDiffuserOutletVelocity

      private double designDiffuserOutletVelocity

    • designSuctionVelocityOverride

      private boolean designSuctionVelocityOverride

    • designDiffuserVelocityOverride

      private boolean designDiffuserVelocityOverride

    • suctionConnectionLength

      private double suctionConnectionLength

    • dischargeConnectionLength

      private double dischargeConnectionLength

    • suctionConnectionLengthOverride

      private boolean suctionConnectionLengthOverride

    • dischargeConnectionLengthOverride

      private boolean dischargeConnectionLengthOverride

    • mechanicalDesign

      private transient EjectorMechanicalDesign mechanicalDesign

    • compressionRatio

      private double compressionRatio
      Compression ratio = discharge pressure / suction pressure.

    • expansionRatio

      private double expansionRatio
      Expansion ratio = motive pressure / discharge pressure.

    • criticalBackPressure

      private double criticalBackPressure
      Critical back pressure in bara (max discharge before breakdown).

    • areaRatio

      private double areaRatio
      Area ratio = mixing area / motive nozzle throat area.

    • motiveNozzleMach

      private double motiveNozzleMach
      Mach number at motive nozzle exit.

    • suctionMach

      private double suctionMach
      Mach number of suction flow at mixing section entrance.

    • mixingMach

      private double mixingMach
      Mach number of mixed flow at mixing section.

    • suctionChoked

      private boolean suctionChoked
      Whether suction flow is choked (Mach >= 1).

    • motiveChoked

      private boolean motiveChoked
      Whether motive flow is choked at nozzle throat.

    • autoSized

      private boolean autoSized
      Flag indicating if ejector has been auto-sized.

    • designEntrainmentRatio

      private double designEntrainmentRatio
      Design entrainment ratio (suction/motive mass ratio).

    • designCompressionRatio

      private double designCompressionRatio
      Design compression ratio (discharge/suction pressure).

    • maxCriticalBackPressure

      private double maxCriticalBackPressure
      Maximum critical back pressure in bara.

    • designMotiveFlowRate

      private double designMotiveFlowRate
      Design motive flow rate in kg/s.

    • ejectorCapacityConstraints

      private Map<String, CapacityConstraint> ejectorCapacityConstraints
      Capacity constraints map.

    • ejectorCapacityAnalysisEnabled

      private boolean ejectorCapacityAnalysisEnabled
      Flag for capacity analysis.

    • BAR_TO_PA

      private static final double BAR_TO_PA
      See Also:

    • DEFAULT_NOZZLE_LENGTH_FACTOR

      private static final double DEFAULT_NOZZLE_LENGTH_FACTOR
      See Also:

    • DEFAULT_SUCTION_LENGTH_FACTOR

      private static final double DEFAULT_SUCTION_LENGTH_FACTOR
      See Also:

    • DEFAULT_MIXING_LENGTH_FACTOR

      private static final double DEFAULT_MIXING_LENGTH_FACTOR
      See Also:

    • DEFAULT_DIFFUSER_LENGTH_FACTOR

      private static final double DEFAULT_DIFFUSER_LENGTH_FACTOR
      See Also:

  • Constructor Details

    • Ejector

      public Ejector(String name, StreamInterface motiveStream, StreamInterface suctionStream)
      Constructs an Ejector with the specified name, motive stream, and suction stream.
      Parameters:
      name - the name of the ejector
      motiveStream - the motive stream
      suctionStream - the suction stream

  • Method Details

    • setDischargePressure

      public void setDischargePressure(double dischargePressure)

      Setter for the field dischargePressure.

      Parameters:
      dischargePressure - a double

    • setEfficiencyIsentropic

      public void setEfficiencyIsentropic(double efficiencyIsentropic)

      Setter for the field efficiencyIsentropic.

      Parameters:
      efficiencyIsentropic - a double

    • setDiffuserEfficiency

      public void setDiffuserEfficiency(double diffuserEfficiency)

      Setter for the field diffuserEfficiency.

      Parameters:
      diffuserEfficiency - a double

    • setSuctionNozzleEfficiency

      public void setSuctionNozzleEfficiency(double efficiency)
      Sets the suction nozzle isentropic efficiency. This accounts for losses in the suction flow path as the suction gas accelerates into the mixing section. Typical values: 0.85-0.95.
      Parameters:
      efficiency - suction nozzle efficiency (0-1)

    • getSuctionNozzleEfficiency

      public double getSuctionNozzleEfficiency()
      Gets the suction nozzle efficiency.
      Returns:
      suction nozzle efficiency

    • setMixingEfficiency

      public void setMixingEfficiency(double efficiency)
      Sets the mixing section efficiency. This accounts for momentum losses during the mixing of motive and suction streams due to turbulence and friction. Typical values: 0.80-0.95. Transvac-type ejectors with optimised mixing sections typically achieve 0.85-0.92.
      Parameters:
      efficiency - mixing efficiency (0-1)

    • getMixingEfficiency

      public double getMixingEfficiency()
      Gets the mixing section efficiency.
      Returns:
      mixing efficiency

    • setThroatArea

      public void setThroatArea(double throatArea)

      Setter for the field throatArea.

      Parameters:
      throatArea - a double

    • setMixingPressure

      public void setMixingPressure(double mixingPressure)
      Sets the target mixing pressure within the ejector. If not set the suction pressure is used.
      Parameters:
      mixingPressure - the mixing pressure in bara

    • setDesignSuctionVelocity

      public void setDesignSuctionVelocity(double velocity)
      Sets the design suction velocity used when calculating mechanical dimensions.
      Parameters:
      velocity - velocity in m/s

    • setDesignDiffuserOutletVelocity

      public void setDesignDiffuserOutletVelocity(double velocity)
      Sets the design diffuser outlet velocity used when calculating mechanical dimensions.
      Parameters:
      velocity - velocity in m/s

    • setSuctionConnectionLength

      public void setSuctionConnectionLength(double length)
      Sets the straight length of suction piping to include in total volume calculations.
      Parameters:
      length - length in metres

    • setDischargeConnectionLength

      public void setDischargeConnectionLength(double length)
      Sets the straight length of discharge piping to include in total volume calculations.
      Parameters:
      length - length in metres

    • initMechanicalDesign

      public void initMechanicalDesign()
      Description copied from class: ProcessEquipmentBaseClass

      Initialize a initMechanicalDesign for the equipment.

      Specified by:
      initMechanicalDesign in interface ProcessEquipmentInterface
      Overrides:
      initMechanicalDesign in class ProcessEquipmentBaseClass

    • getMechanicalDesign

      public EjectorMechanicalDesign getMechanicalDesign()
      Description copied from class: ProcessEquipmentBaseClass

      Get a mechanicalDesign for the equipment.

      Specified by:
      getMechanicalDesign in interface ProcessEquipmentInterface
      Overrides:
      getMechanicalDesign in class ProcessEquipmentBaseClass
      Returns:
      a MechanicalDesign object

    • getDesignResult

      public EjectorMechanicalDesign getDesignResult()
      Backwards compatible accessor for mechanical design results.
      Returns:
      the ejector mechanical design container

    • run

      public void run(UUID id)

      In this method all thermodynamic and unit operations will be calculated in a steady state calculation.

      Specified by:
      run in interface SimulationInterface
      Parameters:
      id - UUID

    • getOutStream

      public StreamInterface getOutStream()

      getOutStream.

      Returns:
      a StreamInterface object

    • getEntrainmentRatio

      public double getEntrainmentRatio()

      getEntrainmentRatio.

      Returns:
      a double

    • getCompressionRatio

      public double getCompressionRatio()
      Returns the compression ratio (discharge pressure / suction pressure). This is a key parameter in Transvac ejector specification.
      Returns:
      compression ratio (dimensionless)

    • getExpansionRatio

      public double getExpansionRatio()
      Returns the expansion ratio (motive pressure / discharge pressure). This indicates how much energy is available from the motive stream.
      Returns:
      expansion ratio (dimensionless)

    • getCriticalBackPressure

      public double getCriticalBackPressure()
      Returns the critical back pressure in bara. This is the maximum discharge pressure at which the ejector can maintain stable operation with the current motive conditions. Above this pressure, the ejector breaks down and entrainment ratio drops sharply to zero. This is the most important parameter in Transvac-style ejector design.
      Returns:
      critical back pressure in bara

    • getAreaRatio

      public double getAreaRatio()
      Returns the area ratio (mixing section area / motive nozzle throat area). This is the primary sizing parameter for ejectors and determines the operating envelope.
      Returns:
      area ratio (dimensionless)

    • getMotiveNozzleMach

      public double getMotiveNozzleMach()
      Returns the Mach number at the motive nozzle exit.
      Returns:
      motive nozzle exit Mach number

    • getSuctionMach

      public double getSuctionMach()
      Returns the Mach number of the suction flow at the mixing section entrance.
      Returns:
      suction Mach number

    • getMixingMach

      public double getMixingMach()
      Returns the Mach number of the mixed flow in the mixing section.
      Returns:
      mixing section Mach number

    • isSuctionChoked

      public boolean isSuctionChoked()
      Returns whether the suction flow is choked (Mach >= 1). When choked, the ejector is operating in its design regime and the entrainment ratio is stable.
      Returns:
      true if suction flow is choked

    • isMotiveChoked

      public boolean isMotiveChoked()
      Returns whether the motive flow is choked at the nozzle. For proper ejector operation, the motive flow should always be choked.
      Returns:
      true if motive flow is choked

    • isInBreakdown

      public boolean isInBreakdown()
      Checks if the current discharge pressure exceeds the critical back pressure, meaning the ejector is operating in breakdown mode and cannot maintain stable entrainment.
      Returns:
      true if the ejector is operating beyond its critical back pressure

    • generatePerformanceCurve

      public List<double[]> generatePerformanceCurve(double minDischargePressure, double maxDischargePressure, int numPoints)
      Generates a performance map showing how entrainment ratio varies with discharge pressure at constant motive and suction conditions. This produces data similar to Transvac performance curves. Each point is calculated by running the ejector at a different discharge pressure.
      Parameters:
      minDischargePressure - minimum discharge pressure in bara
      maxDischargePressure - maximum discharge pressure in bara
      numPoints - number of points in the curve
      Returns:
      list of double arrays [dischargePressure, entrainmentRatio, compressionRatio]

    • diameterFromArea

      private static double diameterFromArea(double area)

    • estimateLength

      private static double estimateLength(double diameter, double factor)

    • cylinderVolume

      private static double cylinderVolume(double area, double length)

    • estimateDefaultMixingPressure

      private double estimateDefaultMixingPressure(double suctionPressure, double dischargePressure, double mDotMotive, double mDotSuction)

    • estimateDesignSuctionVelocity

      private double estimateDesignSuctionVelocity(double suctionPressure, double dischargePressure, double rhoSuction, double mDotSuction)

    • estimateDesignDiffuserOutletVelocity

      private double estimateDesignDiffuserOutletVelocity(double mixingPressure, double dischargePressure, double rhoDiffuser, double mDotTotal)

    • estimateSuctionConnectionLength

      private double estimateSuctionConnectionLength(double suctionDiameter, double suctionPressure, double dischargePressure)

    • estimateDischargeConnectionLength

      private double estimateDischargeConnectionLength(double diffuserDiameter, double mixingPressure, double dischargePressure)

    • clamp

      private static double clamp(double value, double min, double max)

    • estimateSpeedOfSound

      private double estimateSpeedOfSound(SystemInterface fluid)
      Estimates the speed of sound in a fluid from thermodynamic properties. Uses the relationship c = sqrt(Cp/Cv * P / rho) for an ideal-gas approximation when detailed derivatives are not available. For real fluids, this is a reasonable estimate that errs slightly on the conservative side.
      Parameters:
      fluid - the fluid to estimate speed of sound for
      Returns:
      estimated speed of sound in m/s, or 0.0 if cannot be estimated

    • estimateCriticalBackPressure

      private double estimateCriticalBackPressure(SystemInterface mixedFluidClone, double totalEnthalpy, double mixingPressureLocal, double currentDischargePressure)
      Estimates the critical back pressure for the ejector. This is the maximum discharge pressure at which stable ejector operation can be maintained. Above this pressure, the normal shock in the mixing section becomes too strong and the suction flow unchokes.

      The estimation uses a bisection search to find the maximum pressure at which the mixed fluid's static enthalpy (from a PH flash at total/stagnation enthalpy) is consistent with the diffuser efficiency. This is more accurate than analytic formulas, especially for compressible gas ejectors where density varies significantly with pressure.

      Parameters:
      mixedFluidClone - a clone of the mixed fluid for trial flashes
      totalEnthalpy - total (stagnation) enthalpy of mixed stream in J/kg
      mixingPressureLocal - mixing pressure in bara
      currentDischargePressure - current discharge pressure in bara (starting point)
      Returns:
      estimated critical back pressure in bara

    • getMassBalance

      public double getMassBalance(String unit)

      getMassBalance.

      Specified by:
      getMassBalance in interface ProcessEquipmentInterface
      Overrides:
      getMassBalance in class ProcessEquipmentBaseClass
      Parameters:
      unit - a String object
      Returns:
      a double

    • getMotiveStream

      public StreamInterface getMotiveStream()

      Getter for the field motiveStream.

      Returns:
      a StreamInterface object

    • getSuctionStream

      public StreamInterface getSuctionStream()

      Getter for the field suctionStream.

      Returns:
      a StreamInterface object

    • getMixedStream

      public StreamInterface getMixedStream()

      Getter for the field mixedStream.

      Returns:
      a StreamInterface object

    • getEfficiencyIsentropic

      public double getEfficiencyIsentropic()

      Getter for the field efficiencyIsentropic.

      Returns:
      a double

    • getDiffuserEfficiency

      public double getDiffuserEfficiency()

      Getter for the field diffuserEfficiency.

      Returns:
      a double

    • toJson

      public String toJson()

      Serializes the Process Equipment along with its state to a JSON string.

      Specified by:
      toJson in interface ProcessEquipmentInterface
      Overrides:
      toJson in class ProcessEquipmentBaseClass
      Returns:
      json string.

    • toJson

      public String toJson(ReportConfig cfg)
      Serializes the Process Equipment with configurable level of detail.
      Specified by:
      toJson in interface ProcessEquipmentInterface
      Overrides:
      toJson in class ProcessEquipmentBaseClass
      Parameters:
      cfg - report configuration
      Returns:
      json string

    • autoSize

      public void autoSize(double safetyFactor)
      Automatically size the equipment based on connected stream conditions.

      This method calculates dimensions and design parameters using the inlet stream properties and applies the specified safety factor. The equipment must have a valid inlet stream connected before calling this method.

      Specified by:
      autoSize in interface AutoSizeable
      Parameters:
      safetyFactor - multiplier for design capacity, typically 1.1-1.3 (10-30% over design)

    • autoSize

      public void autoSize()
      Automatically size using default safety factor (1.2 = 20% margin).
      Specified by:
      autoSize in interface AutoSizeable

    • autoSize

      public void autoSize(String companyStandard, String trDocument)
      Automatically size using company-specific design standards.

      This method applies design rules from the specified company's technical requirements (TR) documents. The standards are loaded from the NeqSim design database.

      Specified by:
      autoSize in interface AutoSizeable
      Parameters:
      companyStandard - company name (e.g., "Equinor", "Shell", "TotalEnergies")
      trDocument - TR document reference (e.g., "TR2000", "DEP-31.38.01.11")

    • isAutoSized

      public boolean isAutoSized()
      Check if equipment has been auto-sized.
      Specified by:
      isAutoSized in interface AutoSizeable
      Returns:
      true if autoSize() has been called successfully

    • getSizingReport

      public String getSizingReport()
      Get a detailed sizing report after auto-sizing.

      The report includes:

      • Design basis (flow rates, pressures, temperatures)
      • Calculated dimensions
      • Design parameters (K-factor, Cv, velocity, etc.)
      • Safety margins
      Specified by:
      getSizingReport in interface AutoSizeable
      Returns:
      formatted sizing report string

    • getSizingReportJson

      public String getSizingReportJson()
      Get sizing report as JSON for programmatic access.
      Specified by:
      getSizingReportJson in interface AutoSizeable
      Returns:
      JSON string with sizing data

    • initializeEjectorCapacityConstraints

      private void initializeEjectorCapacityConstraints()
      Initialize ejector capacity constraints.

    • setDesignEntrainmentRatio

      public void setDesignEntrainmentRatio(double ratio)
      Sets the design entrainment ratio.
      Parameters:
      ratio - design entrainment ratio (suction/motive mass ratio)

    • getDesignEntrainmentRatio

      public double getDesignEntrainmentRatio()
      Gets the design entrainment ratio.
      Returns:
      design entrainment ratio

    • setDesignCompressionRatio

      public void setDesignCompressionRatio(double ratio)
      Sets the design compression ratio.
      Parameters:
      ratio - design compression ratio (discharge/suction pressure)

    • getDesignCompressionRatio

      public double getDesignCompressionRatio()
      Gets the design compression ratio.
      Returns:
      design compression ratio

    • setMaxCriticalBackPressure

      public void setMaxCriticalBackPressure(double pressure)
      Sets the maximum critical back pressure.
      Parameters:
      pressure - maximum critical back pressure in bara

    • getMaxCriticalBackPressure

      public double getMaxCriticalBackPressure()
      Gets the maximum critical back pressure.
      Returns:
      maximum critical back pressure in bara

    • isCapacityAnalysisEnabled

      public boolean isCapacityAnalysisEnabled()
      Checks if capacity analysis is enabled for this equipment.

      When disabled, this equipment is excluded from bottleneck detection, capacity utilization summaries, and optimization routines. The equipment still tracks its constraints but doesn't contribute to system-level analysis.

      Specified by:
      isCapacityAnalysisEnabled in interface CapacityConstrainedEquipment
      Overrides:
      isCapacityAnalysisEnabled in class ProcessEquipmentBaseClass
      Returns:
      true if capacity analysis is enabled (default is true)

    • setCapacityAnalysisEnabled

      public void setCapacityAnalysisEnabled(boolean enabled)
      Enables or disables capacity analysis for this equipment.

      When disabled, this equipment is excluded from:

      • System bottleneck detection (ProcessSystem.findBottleneck())
      • Capacity utilization summaries (ProcessSystem.getCapacityUtilizationSummary())
      • Equipment near capacity lists (ProcessSystem.getEquipmentNearCapacityLimit())
      • Optimization constraint checking

      The equipment still calculates and tracks its constraints internally.

      Specified by:
      setCapacityAnalysisEnabled in interface CapacityConstrainedEquipment
      Overrides:
      setCapacityAnalysisEnabled in class ProcessEquipmentBaseClass
      Parameters:
      enabled - true to include in capacity analysis, false to exclude

    • getCapacityConstraints

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

      Returns an unmodifiable map of constraint name to constraint object. Constraints are used by the optimization framework to detect bottlenecks, enforce limits, and guide production allocation. Equipment subclasses populate this map via ProcessEquipmentInterface.addCapacityConstraint(CapacityConstraint).

      Specified by:
      getCapacityConstraints in interface CapacityConstrainedEquipment
      Specified by:
      getCapacityConstraints in interface ProcessEquipmentInterface
      Overrides:
      getCapacityConstraints in class ProcessEquipmentBaseClass
      Returns:
      unmodifiable map of constraint name to constraint, empty if none defined

    • getBottleneckConstraint

      public CapacityConstraint getBottleneckConstraint()
      Gets the bottleneck (most limiting) constraint for this equipment.

      Returns the enabled constraint with the highest utilization ratio. If no constraints are defined or enabled, returns null.

      Specified by:
      getBottleneckConstraint in interface CapacityConstrainedEquipment
      Specified by:
      getBottleneckConstraint in interface ProcessEquipmentInterface
      Overrides:
      getBottleneckConstraint in class ProcessEquipmentBaseClass
      Returns:
      the most limiting constraint, or null if none

    • isCapacityExceeded

      public boolean isCapacityExceeded()
      Checks if any capacity constraint is violated (exceeds 100% utilization).

      A violated constraint means the equipment is operating beyond its design capacity. For HARD constraints, this may indicate equipment trip or failure. For SOFT constraints, this indicates reduced efficiency or accelerated wear.

      Specified by:
      isCapacityExceeded in interface CapacityConstrainedEquipment
      Specified by:
      isCapacityExceeded in interface ProcessEquipmentInterface
      Overrides:
      isCapacityExceeded in class ProcessEquipmentBaseClass
      Returns:
      true if any enabled constraint utilization exceeds 1.0 (100%)

    • isHardLimitExceeded

      public boolean isHardLimitExceeded()
      Checks if any HARD constraint limit is exceeded.

      HARD limits represent absolute equipment limits (e.g., maximum speed) that cannot be exceeded without equipment trip or damage. This is more severe than general capacity exceedance.

      Specified by:
      isHardLimitExceeded in interface CapacityConstrainedEquipment
      Specified by:
      isHardLimitExceeded in interface ProcessEquipmentInterface
      Overrides:
      isHardLimitExceeded in class ProcessEquipmentBaseClass
      Returns:
      true if any enabled HARD constraint's max value is exceeded

    • getMaxUtilization

      public double getMaxUtilization()
      Gets the maximum utilization across all enabled constraints.

      Returns the highest utilization ratio across all enabled constraints. Values above 1.0 indicate the equipment is over capacity. Returns 0.0 if no constraints are defined or enabled.

      Specified by:
      getMaxUtilization in interface CapacityConstrainedEquipment
      Specified by:
      getMaxUtilization in interface ProcessEquipmentInterface
      Overrides:
      getMaxUtilization in class ProcessEquipmentBaseClass
      Returns:
      maximum utilization as fraction (1.0 = 100% of design capacity)

    • addCapacityConstraint

      public void addCapacityConstraint(CapacityConstraint constraint)
      Adds a capacity constraint to this equipment.

      Constraints can be added at any time. If a constraint with the same name already exists, it is replaced. Use the fluent builder API on CapacityConstraint to configure the constraint before adding.

      Specified by:
      addCapacityConstraint in interface CapacityConstrainedEquipment
      Specified by:
      addCapacityConstraint in interface ProcessEquipmentInterface
      Overrides:
      addCapacityConstraint in class ProcessEquipmentBaseClass
      Parameters:
      constraint - the capacity constraint to add (ignored if null)

    • removeCapacityConstraint

      public boolean removeCapacityConstraint(String constraintName)
      Removes a capacity constraint by name.
      Specified by:
      removeCapacityConstraint in interface CapacityConstrainedEquipment
      Parameters:
      constraintName - the name of the constraint to remove
      Returns:
      true if the constraint was found and removed

    • clearCapacityConstraints

      public void clearCapacityConstraints()
      Clears all capacity constraints from this equipment.
      Specified by:
      clearCapacityConstraints in interface CapacityConstrainedEquipment