IfcAirToAirHeatRecoveryTypeEnum

Semantic definitions at the type

Type definition

Defines general types of air-to-air heat recovery devices.

HISTORY New enumeration in IFC2x.

Enumeration definition

Constant	Description
FIXEDPLATECOUNTERFLOWEXCHANGER	Heat exchanger with moving parts and alternate layers of plates, separated and sealed from the exhaust and supply air stream passages with primary air entering at secondary air outlet location and exiting at secondary air inlet location.
FIXEDPLATECROSSFLOWEXCHANGER	Heat exchanger with moving parts and alternate layers of plates, separated and sealed from the exhaust and supply air stream passages with secondary air flow in the direction perpendicular to primary air flow.
FIXEDPLATEPARALLELFLOWEXCHANGER	Heat exchanger with moving parts and alternate layers of plates, separated and sealed from the exhaust and supply air stream passages with primary air entering at secondary air inlet location and exiting at secondary air outlet location.
ROTARYWHEEL	A heat wheel with a revolving cylinder filled with an air-permeable medium having a large internal surface area.
RUNAROUNDCOILLOOP	A typical coil energy recovery loop places extended surface, finned tube water coils in the supply and exhaust airstreams of a building.
HEATPIPE	A passive energy recovery device with a heat pipe divided into evaporator and condenser sections.
TWINTOWERENTHALPYRECOVERYLOOPS	An air-to-liquid, liquid-to-air enthalpy recovery system with a sorbent liquid circulates continuously between supply and exhaust airstreams, alternately contacting both airstreams directly in contactor towers.
THERMOSIPHONSEALEDTUBEHEATEXCHANGERS	Sealed systems that consist of an evaporator, a condenser, interconnecting piping, and an intermediate working fluid that is present in both liquid and vapor phases where the evaporator and the condenser are usually at opposite ends of a bundle of straight, individual thermosiphon tubes and the exhaust and supply ducts are adjacent to each other.
THERMOSIPHONCOILTYPEHEATEXCHANGERS	Sealed systems that consist of an evaporator, a condenser, interconnecting piping, and an intermediate working fluid that is present in both liquid and vapor phases where the evaporator and condensor coils are installed independently in the ducts and are interconnected by the working fluid piping.
USERDEFINED	User-defined air to air heat recovery type.
NOTDEFINED	Undefined air to air heat recovery type.

Formal representations

XSD Specification

 <xs:simpleType name="IfcAirToAirHeatRecoveryTypeEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="fixedplatecounterflowexchanger"/>

   <xs:enumeration value="fixedplatecrossflowexchanger"/>

   <xs:enumeration value="fixedplateparallelflowexchanger"/>

   <xs:enumeration value="rotarywheel"/>

   <xs:enumeration value="runaroundcoilloop"/>

   <xs:enumeration value="heatpipe"/>

   <xs:enumeration value="twintowerenthalpyrecoveryloops"/>

   <xs:enumeration value="thermosiphonsealedtubeheatexchangers"/>

   <xs:enumeration value="thermosiphoncoiltypeheatexchangers"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcAirToAirHeatRecoveryTypeEnum = ENUMERATION OF (

 FIXEDPLATECOUNTERFLOWEXCHANGER, 
 FIXEDPLATECROSSFLOWEXCHANGER, 
 FIXEDPLATEPARALLELFLOWEXCHANGER, 
 ROTARYWHEEL, 
 RUNAROUNDCOILLOOP, 
 HEATPIPE, 
 TWINTOWERENTHALPYRECOVERYLOOPS, 
 THERMOSIPHONSEALEDTUBEHEATEXCHANGERS, 
 THERMOSIPHONCOILTYPEHEATEXCHANGERS, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram

	Air To Air Heat Recovery Type Enum
	Enumération des types d'échangeur air-air