IfcDamper
Definition from IAI:
This class defines elements of a damper, which typically is used in
an HVAC air distribution system to control or modulate the flow of
air. An IfcActuator can be either aggregated into the definition of
the IfcDamper using the IfcRelAssemblesElements relationship, or
referenced using the IfcRelConnectsElements objectified relationship.
HISTORY: New entity in IFC R2.0 Geometry Use Definitions The geometric representation of IfcDamper is given
by the IfcProductDefinitionShape, allowing multiple geometric
representations. Included are: Local Placement The use of local placement is defined at the supertype
IfcDistributionFlowElement. Standard Geometric Representation The use of Standard Geometric Representations is defined at the supertype
IfcDistributionFlowElement.
ISSUES: See issues and change log for changes made in IFC R2x.
EXPRESS specification:
|
| PredefinedType | : | Predefined generic types of dampers are specified in an enumeration. There may be a property set given for the predefined types. |
| FrameDepth | : | The length (or depth) of the damper frame. |
| SizingMethod | : | Enumeration that identifies whether the damper is sized nominally or with exact measurements. |
| CloseOffRating | : | Close off rating. |
| LeakageAirFlowRate | : | Leakage air flow rate: the volume of air that still passes through a fully closed damper. |
| PercentOpen | : | Defines the percentage open position for the damper blades. This value varies for dampers under automatic control, but typically remain fixed for dampers used for balancing purposes. |
| WR1 | : | ?? |
| Name | Type | Referred through | Express-G | |
| IfcFlowController | Entity |
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Diagram 1 |
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