The CompressorOperationalType extends its supertype by compressor specific Variables and is formally defined in Table 99.

Table 99 – CompressorOperationalType Definition

Attribute

Value

BrowseName

CompressorOperationalType

IsAbstract

False

References

Node Class

BrowseName

DataType

TypeDefinition

Other

Subtype of the OperationalType defined in 7.45, i.e. inheriting the InstanceDeclarations of that Node.

0:HasComponent

Variable

ActivePressureBand

0:UInt16

0:DataItemType

O, RO

0:HasComponent

Variable

FlowRateRatio

0:Double

0:BaseAnalogType

O, RO

0:HasComponent

Variable

IsentropicEfficiency

0:Double

0:BaseAnalogType

O, RO

0:HasComponent

Variable

SpecificEnergyRequirement

0:Double

0:BaseAnalogType

O, RO

The following nodes override nodes added by the OperationalType

0:HasComponent

Variable

OperatingState

CompressorOperatingStateEnum

0:DataItemType

O, RO

The following illustration of a state machine does not imply the actual function or state machine for a compressor. It serves as an example of how the actual state machines may function.

image041.png

Figure 32 – CompressorOperationalType State Machine Illustration

The InstanceDeclarations of the CompressorOperationalType have additional Attributes defined in Table 100.

Table 100 – CompressorOperationalType Attribute values for child Nodes

Source Path

Value Attribute

Description

ActivePressureBand

Indicates the actual active pressure band.

FlowRateRatio

Calculated ratio of actual and maximum possible flow rate of a compressor.

IsentropicEfficiency

Calculated isentropic efficiency.

OperatingState

Actual operating state of the compressor.

SpecificEnergyRequirement

Calculated shaft input energy per unit of compressor actual rate of flow.