Class Ifc4x2::IfcChiller

Nested Relationships

This class is a nested type of Struct Ifc4x2.

Inheritance Relationships

Base Type

Class Documentation

class Ifc4x2::IfcChiller : public Ifc4x2::IfcEnergyConversionDevice

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 IFC2x4

Type Use Definition IfcChiller defines the occurrence of any chiller; common information about chiller types is handled by IfcChillerType. The IfcChillerType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcChillerType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcChillerType has ports or aggregated elements, such objects are reflected at the IfcChiller occurrence using the IfcRelDefinesByObject relationship.

Property Use Definition The property sets relating to this entity are defined by IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. Property sets may also be specified at the IfcChillerType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcChillerType.HasPropertySets. If both are given, then the properties directly defined at IfcChiller override the properties defined at IfcChillerType. Refer to the documentation at the supertype IfcEnergyConversionDevice and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: Pset_ChillerPHistory (PSET_PERFORMANCEDRIVEN) Pset_ChillerTypeCommon (PSET_TYPEDRIVENOVERRIDE)

Quantity Use Definition The quantities relating to this entity are defined by IfcElementQuantity and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. The following base quantities are defined and shall be exchanged with the IfcElementQuantity.Name = ‘BaseQuantities’. Other quantities, being subjected to local standard of measurement, may be defined with another string value assigned to Name. In this case a valid value for MethodOfMeasurement shall be provided.

Qto_ChillerBaseQuantities

Material Use Definition The material of the IfcChiller is defined by IfcMaterialConstituentSet or as a fallback by IfcMaterial, and attached by the RelatingMaterial attribute on the IfcRelAssociatesMaterial relationship. It is accessible by the HasAssociations inverse attribute. Material information can also be given at the IfcChillerType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:

Body: The primary material from which the object is constructed. Refrigerant: Refrigerant material.

Composition Use Definition The IfcChiller may be aggregated into components using IfcRelAggregates where RelatingObject refers to the enclosing IfcChiller and RelatedObjects contains one or more components. Aggregation use is defined for the following predefined types:

May contain IfcDistributionElement components. Chillers may aggregate distribution flow elements forming a refrigeration cycle (compressor, condenser, valve, evaporator), as well as control elements.

Figure 214 illustrates chiller composition use. Figure 214 — Chiller composition use

Port Use Definition The distribution ports relating to the IfcChiller are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the chiller occurrence is defined by IfcChillerType, then the port occurrences must reflect those defined at the IfcChillerType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcChiller PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:

AIRCOOLED

Power (ELECTRICAL, SINK): Receives electrical power. Control (CONTROL, SINK): Control unit accessing internal sensors and actuators. ChilledWaterIn (CHILLEDWATER, SINK): Chilled water return. ChilledWaterOut (CHILLEDWATER, SOURCE): Chilled water supply. VentilationIn (VENTILATION, SINK): Incoming cooler air. VentilationOut (VENTILATION, SOURCE): Outgoing hotter air.

WATERCOOLED

Power (ELECTRICAL, SINK): Receives electrical power. Control (CONTROL, SINK): Control unit accessing internal sensors and actuators. ChilledWaterIn (CHILLEDWATER, SINK): Chilled water return. ChilledWaterOut (CHILLEDWATER, SOURCE): Chilled water supply. CondenserWaterIn (CONDENSERWATER, SINK): Incoming cooled condenser water. CondenserWaterOut (CONDENSERWATER, SOURCE): Outgoing heated condenser water.

Figure 215 illustrates chiller port use. Figure 215 — Chiller port use

Public Types

typedef IfcTemplatedEntityList<IfcChiller> list

Public Functions

bool hasPredefinedType() const

Whether the optional attribute PredefinedType is defined for this IfcChiller.

::Ifc4x2::IfcChillerTypeEnum::Value PredefinedType() const
void setPredefinedType(::Ifc4x2::IfcChillerTypeEnum::Value v)
const IfcParse::entity &declaration() const
IfcChiller(IfcEntityInstanceData *e)
IfcChiller(std::string v1_GlobalId, ::Ifc4x2::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4x2::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4x2::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4x2::IfcChillerTypeEnum::Value> v9_PredefinedType)

Public Static Functions

const IfcParse::entity &Class()