|Type d'élément de distribution de fluide|
|Komponente der TGA (allgemein) - Typ|
The element type IfcDistributionFlowElementType defines a list of commonly shared property set definitions of an element and an optional set of product representations. It is used to define an element specification (the specific product information that is common to all occurrences of that product type).
Distribution flow element types (orthe instantiable subtypes) may be exchanged without being already assigned to occurrences.
The occurrences of the IfcDistributionFlowElementType are represented by instances of IfcDistributionFlowElement or its subtypes.
HISTORY New entity in IFC2x2.
IFC4 CHANGE Ports may now be defined using IfcRelNests to enable definition of ports at type definitions (both forward and backward compatible), provide a logical order, and reduce the number of relationship objects needed. The relationship IfcRelConnectsPortToElement is still supported on occurrence objects, however is now specific to dynamically connected ports.
Common Use Definitions
The following concepts are inherited at supertypes:
Type Axis Geometry
The Type Axis Geometry concept applies to this entity as shown in Table 216.
Table 216 — IfcDistributionFlowElementType Type Axis Geometry
This represents the 3D flow path of the item having IfcShapeRepresentation.RepresentationType of 'Curve3D' and containing a single IfcBoundedCurve subtype such as IfcPolyline, IfcTrimmedCurve, or IfcCompositeCurve. For elements containing directional ports (IfcDistributionPort with FlowDirection of SOURCE or SINK), the direction of the curve indicates direction of flow where a SINK port is positioned at the start of the curve and a SOURCE port is positioned at the end of the curve. This representation is most applicable to flow segment types (pipes, ducts, cables), however may be used at other elements to define a primary flow path if applicable.
If an element type is defined parametrically (such as a flow segment type defining common material profile but no particular length or path), then no representations shall be asserted at the type.
NOTE The product representations are defined as representation maps (at the level of the supertype IfcTypeProduct, which get assigned by an element occurrence instance through the IfcShapeRepresentation.Item being an IfcMappedItem.
Type Clearance Geometry
The Type Clearance Geometry concept applies to this entity as shown in Table 217.
Table 217 — IfcDistributionFlowElementType Type Clearance Geometry
This represents the 3D clearance volume of the item having RepresentationType of 'Surface3D'. Such clearance region indicates space that should not intersect with the 'Body' representation between element occurrences, though may intersect with the 'Clearance' representation of other element occurrences. The particular use of clearance space may be for safety, maintenance, or other purposes.
Type Lighting Geometry
The Type Lighting Geometry concept applies to this entity as shown in Table 218.
Table 218 — IfcDistributionFlowElementType Type Lighting Geometry
This represents the light emission of the item having IfcShapeRepresentation.RepresentationType of 'LightSource' and containing one or more IfcLightSource subtypes. This representation is most applicable to lamps and light fixtures, however may be used at other elements that emit light.
XSD Specification: <xs:element name="IfcDistributionFlowElementType" type="ifc:IfcDistributionFlowElementType" abstract="true" substitutionGroup="ifc:IfcDistributionElementType" nillable="true"/>
<xs:complexType name="IfcDistributionFlowElementType" abstract="true">
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