A chiller is a device used to remove heat from a liquid via a vapor-compression or absorption refrigeration cycle to cool a fluid, typically water or a mixture of water and glycol. The chilled fluid is then used to cool and dehumidify air in a building.

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 456.

Table 456 — IfcChiller Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 457.

Table 457 — IfcChiller Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 458.

Table 458 — IfcChiller Quantity Sets

Material Constituents

The Material Constituents concept applies to this entity as shown in Table 459.
CasingMaterial from which the casing is constructed.
RefrigerantRefrigerant material.

Table 459 — IfcChiller Material Constituents

Object Aggregation

The Object Aggregation concept applies to this entity as shown in Table 460.
 IfcDistributionElementChillers may aggregate distribution flow elements forming a refrigeration cycle (compressor, condenser, valve, evaporator), as well as control elements.

Table 460 — IfcChiller Object Aggregation

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 461.
AIRCOOLEDPowerSINKELECTRICALReceives electrical power.
AIRCOOLEDControlSINKCONTROLControl unit accessing internal sensors and actuators.
AIRCOOLEDChilledWaterInSINKCHILLEDWATERChilled water return.
AIRCOOLEDChilledWaterOutSOURCECHILLEDWATERChilled water supply.
AIRCOOLEDVentilationInSINKVENTILATIONIncoming cooler air.
AIRCOOLEDVentilationOutSOURCEVENTILATIONOutgoing hotter air.
WATERCOOLEDPowerSINKELECTRICALReceives electrical power.
WATERCOOLEDControlSINKCONTROLControl unit accessing internal sensors and actuators.
WATERCOOLEDChilledWaterInSINKCHILLEDWATERChilled water return.
WATERCOOLEDCondenserWaterInSINKCONDENSERWATERIncoming cooler condenser water.
WATERCOOLEDCondenserWaterOutSOURCECONDENSERWATEROutgoing hotter condenser water.

Table 461 — IfcChiller Port Nesting

XSD Specification:

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

EXPRESS Specification:

ENTITY IfcChiller
SUBTYPE OF IfcEnergyConversionDevice;
PredefinedType : OPTIONAL IfcChillerTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcChillerTypeEnum.USERDEFINED) OR ((PredefinedType = IfcChillerTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCCHILLERTYPE' 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 IfcChillerType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no chiller type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcChillerType.

Inheritance Graph:

ENTITY IfcChiller
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 IfcChiller
PredefinedType : OPTIONAL IfcChillerTypeEnum;

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