Package neqsim.process.equipment.capacity

package neqsim.process.equipment.capacity

Equipment capacity constraint framework for process optimization.

This package provides a standardized framework for defining, tracking, and querying capacity constraints on process equipment. It enables automated bottleneck detection and optimization across entire process systems.

Key Components

• CapacityConstraint - Defines a single capacity limit with design value, max value, current value supplier, and utilization calculations
• CapacityConstrainedEquipment - Interface for equipment that has capacity limits (separators, compressors, pumps, etc.)
• StandardConstraintType - Predefined constraint types with standard names and units

Constraint Types

• HARD - Cannot be exceeded (e.g., max speed, surge limit). Exceeding causes trip or damage.
• SOFT - Can be temporarily exceeded (e.g., design flow). Reduces efficiency or life.
• DESIGN - Informational only. Used for reporting and optimization guidance.

Usage Example

// In equipment class (e.g., Compressor)
public class Compressor implements CapacityConstrainedEquipment {
  private Map<String, CapacityConstraint> constraints = new LinkedHashMap<>();

  public void initializeConstraints() {
    // Speed constraint
    addCapacityConstraint(StandardConstraintType.COMPRESSOR_SPEED.createConstraint()
        .setDesignValue(10000.0)
        .setMaxValue(11000.0)
        .setWarningThreshold(0.9)
        .setValueSupplier(() -> this.getSpeed()));

    // Power constraint
    addCapacityConstraint(StandardConstraintType.COMPRESSOR_POWER.createConstraint()
        .setDesignValue(5000.0)
        .setMaxValue(5500.0)
        .setValueSupplier(() -> this.getPower()));
  }
}

// In ProcessSystem or optimization code
ProcessSystem process = ...;
BottleneckResult bottleneck = process.findBottleneck();
System.out.println("Bottleneck: " + bottleneck.getEquipmentName());
System.out.println("Constraint: " + bottleneck.getConstraint().getName());
System.out.println("Utilization: " + bottleneck.getUtilizationPercent() + "%");

Supported Equipment Types

Equipment types and their typical capacity constraints

Equipment	Typical Constraints
Separator	Gas load factor, liquid load factor, residence time
Compressor	Speed, power, surge margin, discharge temperature
Pump	NPSH margin, flow rate, power
Heat Exchanger	Duty, approach temperature, pressure drop
Valve	Cv utilization, pressure drop, opening
Pipe	Velocity, erosional velocity ratio, pressure drop

Version:

1.0

Author:

NeqSim Development Team

See Also:

• CapacityConstraint
• CapacityConstrainedEquipment
• StandardConstraintType

Related Packages

Package	Description
neqsim.process.equipment

Class	Description
BottleneckResult	Result class containing information about the bottleneck equipment and constraint.
CapacityConstrainedEquipment	Interface for process equipment that has capacity constraints.
CapacityConstraint	Represents a capacity constraint for process equipment.
CapacityConstraint.ConstraintSeverity	Enum defining the severity level of constraint violations.
CapacityConstraint.ConstraintType	Enum defining the type of capacity constraint.
CompressorCapacityStrategy	Capacity strategy for compressor equipment.
DistillationColumnCapacityStrategy	Capacity strategy for distillation column equipment.
EjectorCapacityStrategy	Capacity strategy for ejector equipment.
EquipmentCapacityStrategy	Strategy interface for equipment-specific capacity evaluation.
EquipmentCapacityStrategyRegistry	Registry for equipment capacity strategies.
ExpanderCapacityStrategy	Capacity strategy for expander equipment.
HeatExchangerCapacityStrategy	Capacity strategy for heat exchanger equipment.
MixerCapacityStrategy	Capacity strategy for mixer equipment.
PipeCapacityStrategy	Capacity strategy for pipe and pipeline equipment.
PumpCapacityStrategy	Capacity strategy for pump equipment.
SeparatorCapacityStrategy	Capacity strategy for separator equipment.
SplitterCapacityStrategy	Capacity strategy for splitter equipment.
StandardConstraintType	Standard constraint types commonly used across process equipment.
TankCapacityStrategy	Capacity strategy for tank equipment.
ValveCapacityStrategy	Capacity strategy for valve equipment.