Components

The Components module defines the primitive systems: StorageComponents, ReversibleComponents, and IrreversibleComponents.

Constraint multiplier variable

Component is a subtype of EPHS.AbstractSystems.AbstractSystem. Concrete subtypes of Component are StorageComponent, ReversibleComponent, and IrreversibleComponent.

Constraint(residual::SymExpr)

The residual is forced to be zero by the corresponding constraint variable.

EffortPort(quantity::Quantity, effort::SymExpr)

A EffortPort of a ReversibleComponent used to define a transformer-like coupling (in combination with a corresponding FlowPort).

FlowPort(quantity::Quantity, flow::SymExpr)

A FlowPort of a ReversibleComponent used to define a gyrator-like coupling or a transformer-like coupling (in combination with a corresponding EffortPort).

IrreversibleComponent(ports::Dtry{IrreversiblePort})

An IrreversibleComponent is a primitive system representing irreversible processes.

Fields

• ports: directory of IrreversiblePorts

IrreversiblePort(quantity::Quantity, flow::SymExpr)

A port of an IrreversibleComponent provides the flow variable.

Fields

• quantity: EPHS.AbstractSystems.Quantity of the port
• flow: EPHS.SymbolicExpressions.SymExpr defining the flow variable

Par(box_path::DtryPath, par_path::DtryPath, value::Float64

Symbolic parameter identified by box_path * par_path.

Fields

• box_path: indicates the subsystem to which the parameter belongs
• par_path: distinguishes between different parameters of the same subsystem
• value: (default) value of the parameter

Par(name::Symbol, value::Float64

Constructs a symbolic Parameter with box_path=DtryPath() and par_path=DtryPath(name).

Arguments

• name: name of the parameter
• value: (default) value of the parameter

ReversibleComponent(ports::Dtry{ReversiblePort})

A ReversibleComponent is a primitive system representing reversible dynamics, transformations, or constraints.

Fields

• ports: directory of ReversiblePorts

ReversiblePort(variant::Union{FlowPort,EffortPort,StatePort,Constraint})

A 'port' of a ReversibleComponent can be a

• FlowPort which provides a flow variable
• EffortPort which provides an effort variable
• StatePort which consumes a state variable
• Constraint which defines a residual and a constraint variable

StatePort(quantity::Quantity)

A StatePort of a ReversibleComponent needed if a gyrator/transformer-like coupling or a constraint depends on a state variable of a system which is not already connected via a FlowPort or an EffortPort.

StorageComponent(ports::Dtry{StoragePort}, energy::SymExpr)

A StorageComponent is a primitive system representing energy storage.

Fields

• ports: directory of StoragePorts
• energy: EPHS.SymbolicExpressions.SymExpr defining the energy

A StorageComponent should be constructed using the function StorageComponent(ports::Dtry{Quantity}, energy::SymExpr), which uses symbolic differentiation to compute the effort variables of the ports.

StorageComponent(ports::Dtry{Quantity}, energy::SymExpr)

A StorageComponent is a primitive system representing energy storage.

Arguments

• ports: directory of Quantitys defining the interface of the component (power ports only)
• energy: EPHS.SymbolicExpressions.SymExpr defining the energy

StoragePort(quantity::Quantity, effort::SymExpr)

A port of a StorageComponent provides the effort variable.

Fields

• quantity: EPHS.AbstractSystems.Quantity of the port
• effort: EPHS.SymbolicExpressions.SymExpr defining the effort variable

Symbolic parameter, see Par, representing the exergy environment temperature with a (default) value of 300K.

Symbolic parameter, see Par, representing the exergy environment pressuere with a (default) value of 10⁵Pa.