Echangeur de chaleur

A heat exchanger is a device used to provide heat transfer between non-mixing media such as plate and shell and tube heat exchangers.

IfcHeatExchanger is commonly used on water-side distribution systems to recover energy from a liquid to another liquid (typically water-based), whereas IfcAirToAirHeatRecovery is commonly used on air-side distribution systems to recover energy from a gas to a gas (usually air).

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 538.

Table 538 — IfcHeatExchanger Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 539.

Table 539 — IfcHeatExchanger Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 540.

Table 540 — IfcHeatExchanger Quantity Sets

Material Constituents

The Material Constituents concept applies to this entity as shown in Table 541.
CasingMaterial from which the casing is constructed.

Table 541 — IfcHeatExchanger Material Constituents

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 542.
 HeatingInletSINKNOTDEFINEDInlet of substance to be heated.
 HeatingOutletSOURCENOTDEFINEDOutlet of substance to be heated.
 CoolingInletSINKNOTDEFINEDInlet of substance to be cooled.
 CoolingOutletSOURCENOTDEFINEDOutlet of substance to be cooled.

Table 542 — IfcHeatExchanger Port Nesting

XSD Specification:

 <xs:element name="IfcHeatExchanger" type="ifc:IfcHeatExchanger" substitutionGroup="ifc:IfcEnergyConversionDevice" nillable="true"/>
 <xs:complexType name="IfcHeatExchanger">
   <xs:extension base="ifc:IfcEnergyConversionDevice">
    <xs:attribute name="PredefinedType" type="ifc:IfcHeatExchangerTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcHeatExchanger
SUBTYPE OF IfcEnergyConversionDevice;
PredefinedType : OPTIONAL IfcHeatExchangerTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcHeatExchangerTypeEnum.USERDEFINED) OR ((PredefinedType = IfcHeatExchangerTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCHEATEXCHANGERTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

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

Inheritance Graph:

ENTITY IfcHeatExchanger
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
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 IfcLabel;
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;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcEnergyConversionDevice
ENTITY IfcHeatExchanger
PredefinedType : OPTIONAL IfcHeatExchangerTypeEnum;

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