IfcFluidFlowProperties

Definition from IAI: Common definition to capture the basic flow properties of a fluid typically used within a flow distribution system.

In cases where an attribute has a SingleValue specified, the corresponding TimeSeries value shall be omitted. Contrarily, when a TimeSeries value is specified, the corresponding SingleValue shall be omitted.

IfcFluidFlowProperties is a statically defined property set and should be attached to the instance(s) of the IfcDistributionPort through the IfcRelDefinesByProperties relationship. Where two ports are joined together via the IfcRelConnectsPorts relationship, instances of the IfcFluidFlowProperties can be shared.

> HISTORY: New entity in IFC R2x.

EXPRESS specification:

ENTITY IfcFluidFlowProperties
SUBTYPE OF ( | IfcPropertySetDefinition);
PropertySource | : | IfcPropertySourceEnum;
FlowConditionTimeSeries | : | OPTIONAL IfcTimeSeries;
VelocityTimeSeries | : | OPTIONAL IfcTimeSeries;
FlowrateTimeSeries | : | OPTIONAL IfcTimeSeries;
Fluid | : | IfcMaterial;
PressureTimeSeries | : | OPTIONAL IfcTimeSeries;
UserDefinedPropertySource | : | OPTIONAL IfcLabel;
TemperatureSingleValue | : | OPTIONAL IfcThermodynamicTemperatureMeasure;
WetBulbTemperatureSingleValue | : | OPTIONAL IfcThermodynamicTemperatureMeasure;
WetBulbTemperatureTimeSeries | : | OPTIONAL IfcTimeSeries;
TemperatureTimeSeries | : | OPTIONAL IfcTimeSeries;
FlowrateSingleValue | : | OPTIONAL IfcDerivedMeasureValue;
FlowConditionSingleValue | : | OPTIONAL IfcPositiveRatioMeasure;
VelocitySingleValue | : | OPTIONAL IfcLinearVelocityMeasure;
PressureSingleValue | : | OPTIONAL IfcPressureMeasure;
END_ENTITY;

Attribute definitions:

PropertySource | : | The source of the fluid flow properties (e.g., are these design values, measured values, etc.).
FlowConditionTimeSeries | : | A times series defining the flow condition as a percentage of the cross-sectional area.
VelocityTimeSeries | : | A time series of velocity values of the fluid.
FlowrateTimeSeries | : | A time series of flow rate values. Note that either volumetric or mass flow rate values should be specified.
Fluid | : | The properties of the fluid.
PressureTimeSeries | : | A time series of pressure values of the fluid.
UserDefinedPropertySource | : | This attribute must be defined if the PropertySource is USERDEFINED.
TemperatureSingleValue | : | Temperature of the fluid. For air this value represents the dry bulb temperature.
WetBulbTemperatureSingleValue | : | Wet bulb temperature of the fluid; only applicable if the fluid is air.
WetBulbTemperatureTimeSeries | : | Time series of fluid wet bulb temperature values. These values are only applicable if the fluid is air.
TemperatureTimeSeries | : | Time series of fluid temperature values. For air, these values represent the dry bulb temperature.
FlowrateSingleValue | : | The flow rate of the fluid. Either a mass or volumetric flow rate shall be defined.
FlowConditionSingleValue | : | Defines the flow condition as a percentage of the cross-sectional area.
VelocitySingleValue | : | The velocity of the fluid.
PressureSingleValue | : | The pressure of the fluid.

Inheritance graph

ENTITY IfcFluidFlowProperties;
ENTITY IfcRoot;
GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;
ENTITY IfcPropertyDefinition;
INVERSE
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcPropertySetDefinition;
INVERSE
PropertyDefinitionOf | : | SET [0:1] OF IfcRelDefinesByProperties FOR RelatingPropertyDefinition;
DefinesType | : | SET [0:1] OF IfcTypeObject FOR HasPropertySets;
ENTITY IfcFluidFlowProperties;
PropertySource | : | IfcPropertySourceEnum;
FlowConditionTimeSeries | : | OPTIONAL IfcTimeSeries;
VelocityTimeSeries | : | OPTIONAL IfcTimeSeries;
FlowrateTimeSeries | : | OPTIONAL IfcTimeSeries;
Fluid | : | IfcMaterial;
PressureTimeSeries | : | OPTIONAL IfcTimeSeries;
UserDefinedPropertySource | : | OPTIONAL IfcLabel;
TemperatureSingleValue | : | OPTIONAL IfcThermodynamicTemperatureMeasure;
WetBulbTemperatureSingleValue | : | OPTIONAL IfcThermodynamicTemperatureMeasure;
WetBulbTemperatureTimeSeries | : | OPTIONAL IfcTimeSeries;
TemperatureTimeSeries | : | OPTIONAL IfcTimeSeries;
FlowrateSingleValue | : | OPTIONAL IfcDerivedMeasureValue;
FlowConditionSingleValue | : | OPTIONAL IfcPositiveRatioMeasure;
VelocitySingleValue | : | OPTIONAL IfcLinearVelocityMeasure;
PressureSingleValue | : | OPTIONAL IfcPressureMeasure;
END_ENTITY;