#### 7.2.3.13 IfcElectricFlowStorageDevice

| Elektrisches Speichergerät

An electric flow storage device is a device in which electrical energy is stored and from which energy may be progressively released.

> HISTORY New entity in IFC4

## Electrical System Design

The following concepts are inherited at supertypes:

- IfcDistributionElement: Footprint Geometry

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R | R | R | R |  |  | R | R | R
Export |  |  |  |  | R | R | R | R |  |  | R | R | R

Object Typing

The Object Typing concept applies to this entity as shown in Table 96.

Type
IfcElectricFlowStorageDeviceType
IfcDistributionElementType
Table 96 — IfcElectricFlowStorageDevice Object Typing

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  | R |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  |

Properties for Occurrences

The Properties for Occurrences concept applies to this entity as shown in Table 97.

PredefinedType | Name
--- | ---
| Pset_ElectricFlowStorageDeviceTypeCommon
| Pset_ElectricalDeviceCommon
Table 97 — IfcElectricFlowStorageDevice Properties for Occurrences

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R |  |  | R |  |  | R |  |
Export |  |  |  |  | R |  |  | R |  |  | R |  |

Ports

The Ports concept applies to this entity as shown in Table 98.

PredefinedType | Name | Flow | Type | Description
--- | --- | --- | --- | ---
| Line | SINK | ELECTRICAL | Incoming power used to charge the flow storage device.
| Load | SOURCE | ELECTRICAL | Outgoing power backed by the flow storage device.
Table 98 — IfcElectricFlowStorageDevice Ports

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | R |  |  | R |  |  | R |  |
Export |  |  |  |  | R |  |  | R |  |  | R |  |

Spatial Containment

The Spatial Containment concept applies to this entity as shown in Table 99.

Structure | Description
--- | ---
IfcSite | Underground or overground cable carriers are contained within the site.
IfcBuildingStorey | Cable carriers that span multiple spaces are contained within a building storey. If the cable carrier segment spans multiple storeys, it is placed within the storey containing the placement origin, corresponding with the axis origin.
Table 99 — IfcElectricFlowStorageDevice Spatial Containment

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  | O |  |  | R |  |  | R |  |
Export |  |  |  |  | O |  |  | R |  |  | R |  |

Placement

The Placement concept applies to this entity.

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  | R |  |  | R |  |
Export |  |  |  |  |  |  |  | R |  |  | R |  |

Body Geometry

The Body Geometry concept applies to this entity as shown in Table 100.

RepresentationType | Geometry | Description
--- | --- | ---
Brep | IfcFacetedBrep | All fixtures (all non distribution flow elements, i.e. everything which is not a duct, a pipe, a cable, or a cable carrier) should be defined by an b-rep geometry. This includes also the complex flow fitting elements (e.g. Y branch or T branch) or distribution flow elements with size changes (e.g. reducer).
SurfaceModel | IfcFaceBasedSurfaceModel | If the geometric model consistency of a b-rep shape representation can not be guaranteed (arcwise connected volume bounded by faces, each being connected, oriented, finite, closed 2-manifold), a surface representation based on open shells should be used.
SweptSolid | IfcExtrudedAreaSolid | All "simple" distribution flow elements (general ducts and pipes) are defined by sweep geometry.
SectionedSpine | IfcSectionedSpine | If only the analytical shape is required for which the exact interpolation between the cross sections is not required, a sectioned spine can be used.
CSG | IfcCsgSolid |
Tessellation | IfcTriangulatedFaceSet |
MappedRepresentation | IfcMappedItem | All occurrences of IfcDistributionElement (and its subtypes) should (whenever possible) share a representation map established by the assigned type. The geometric representation of the occurrence is then an IfcMappedItem.
Table 100 — IfcElectricFlowStorageDevice Body Geometry

Exchange |  |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Import |  |  |  |  |  |  |  |  |  |  | R |  |
Export |  |  |  |  |  |  |  |  |  |  | R |  |

XSD Specification:

<xs:element name="IfcElectricFlowStorageDevice" type="ifc:IfcElectricFlowStorageDevice" substitutionGroup="ifc:IfcFlowStorageDevice" nillable="true"/>
<xs:complexType name="IfcElectricFlowStorageDevice">
<xs:complexContent>
<xs:extension base="ifc:IfcFlowStorageDevice"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcElectricFlowStorageDevice

| SUBTYPE OF (IfcFlowStorageDevice);

PredefinedType | : | OPTIONAL IfcStrippedOptional;

| WHERE

CorrectPredefinedType | : | NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcElectricFlowStorageDeviceTypeEnum.USERDEFINED) OR ((PredefinedType = IfcElectricFlowStorageDeviceTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned | : | (SIZEOF(IsTypedBy) = 0) OR ('IFCELECTRICALDOMAIN.IFCELECTRICFLOWSTORAGEDEVICETYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

END_ENTITY;

Formal Propositions:

CorrectPredefinedType | : | Either the PredefinedType attribute is unset (e.g. because an IfcElectricFlowStorageDeviceType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned | : | Either there is no electric flow storage device type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcElectricFlowStorageDeviceType.

Inheritance Graph:

ENTITY IfcElectricFlowStorageDevice

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcObjectDefinition

| INVERSE

HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
Nests | : | SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy | : | SET OF IfcRelNests FOR RelatingObject;
HasContext | : | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy | : | SET OF IfcRelAggregates FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;

| ENTITY IfcObject

ObjectType | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsDeclaredBy | : | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares | : | SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy | : | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy | : | SET OF IfcRelDefinesByProperties FOR RelatedObjects;

| ENTITY IfcProduct

ObjectPlacement | : | OPTIONAL IfcObjectPlacement;
Representation | : | OPTIONAL IfcProductRepresentation;

| INVERSE

ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;

| ENTITY IfcElement

Tag | : | OPTIONAL IfcStrippedOptional;

| INVERSE

IsInterferedByElements | : | SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements | : | SET OF IfcRelInterferesElements FOR RelatingElement;
ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcDistributionElement

| INVERSE

| ENTITY IfcDistributionFlowElement

| INVERSE

| ENTITY IfcFlowStorageDevice

| ENTITY IfcElectricFlowStorageDevice

PredefinedType | : | OPTIONAL IfcStrippedOptional;

END_ENTITY;

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