IFC 4.3.x development

7.5.2.3 IfcAirToAirHeatRecoveryTypeEnum

7.5.2.3.1 Semantic definitions at the entity

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

HISTORY  New enumeration in IFC2x.

Items

FIXEDPLATECOUNTERFLOWEXCHANGER
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
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
USERDEFINED

User-defined air to air heat recovery type.

NOTDEFINED

Undefined air to air heat recovery type.

7.5.2.3.1 Formal representations

TYPE IfcAirToAirHeatRecoveryTypeEnum = ENUMERATION OF
	(FIXEDPLATECOUNTERFLOWEXCHANGER
	,FIXEDPLATECROSSFLOWEXCHANGER
	,FIXEDPLATEPARALLELFLOWEXCHANGER
	,ROTARYWHEEL
	,RUNAROUNDCOILLOOP
	,HEATPIPE
	,TWINTOWERENTHALPYRECOVERYLOOPS
	,THERMOSIPHONSEALEDTUBEHEATEXCHANGERS
	,THERMOSIPHONCOILTYPEHEATEXCHANGERS
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;