IFC 4.3.0.1 (IFC4X3) development

7.5.2.8 IfcCompressorTypeEnum

7.5.2.8.1 Semantic definition

Enumeration defining the typical types of compressors.

7.5.2.8.2 Type values

Type Description
BOOSTER

Positive-displacement reciprocating compressor where pressure is increased by a booster.

DYNAMIC

The pressure of refrigerant vapor is increased by a continuous transfer of angular momentum from a rotating member to the vapor followed by conversion of this momentum into static pressure.

HERMETIC

Positive-displacement reciprocating compressor where the motor and compressor are contained within the same housing, with the motor shaft integral with the compressor crankshaft and the motor in contact with refrigerant.

OPENTYPE

Positive-displacement reciprocating compressor where the shaft extends through a seal in the crankcase for an external drive.

RECIPROCATING

Positive-displacement compressor using a piston driven by a connecting rod from a crankshaft.

ROLLINGPISTON

Positive-displacement rotary compressor using a roller mounted on the eccentric of a shaft with a single vane in the nonrotating cylindrical housing.

ROTARY

Positive-displacement compressor using a roller or rotor device.

ROTARYVANE

Positive-displacement rotary compressor using a roller mounted on the eccentric of a shaft with multiple vanes in the nontotating cylindrical housing.

SCROLL

Positive-displacement compressor using two inter-fitting, spiral-shaped scroll members.

SEMIHERMETIC

Positive-displacement reciprocating compressor where the hermetic compressors use bolted construction amenable to field repair.

SINGLESCREW

Positive-displacement rotary compressor using a single cylindrical main rotor that works with a pair of gate rotors.

SINGLESTAGE

Positive-displacement reciprocating compressor where vapor is compressed in a single stage.

TROCHOIDAL

Positive-displacement compressor using a rolling motion of one circle outside or inside the circumference of a basic circle and produce either epitrochoids or hypotrochoids.

TWINSCREW

Positive-displacement rotary compressor using two mating helically grooved rotors, male (lobes) and female (flutes) in a stationary housing with inlet and outlet gas ports.

WELDEDSHELLHERMETIC

Positive-displacement reciprocating compressor where the motor compressor is mounted inside a steel shell, which, in turn is sealed by welding.

USERDEFINED

User-defined compressor type.

NOTDEFINED

Undefined compressor type.

Table 7.5.2.8.A

7.5.2.8.3 Formal representation

TYPE IfcCompressorTypeEnum = ENUMERATION OF
	(BOOSTER
	,DYNAMIC
	,HERMETIC
	,OPENTYPE
	,RECIPROCATING
	,ROLLINGPISTON
	,ROTARY
	,ROTARYVANE
	,SCROLL
	,SEMIHERMETIC
	,SINGLESCREW
	,SINGLESTAGE
	,TROCHOIDAL
	,TWINSCREW
	,WELDEDSHELLHERMETIC
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;

7.5.2.8.4 References

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