IFC (IFC4X3_ADD2) under development Pset_CoilTypeHydronic Semantic definition

Hydronic coil type attributes. Applicable entities Properties

Name Property Type Data Type Description
FluidPressureRange IfcPropertyBoundedValue IfcPressureMeasure

Allowable water working pressure range inside the tube.

CoilCoolant IfcPropertyEnumeratedValue PEnum_CoilCoolant

The fluid used for heating or cooling used by the hydronic coil.

CoilConnectionDirection IfcPropertyEnumeratedValue PEnum_CoilConnectionDirection

Coil connection direction (facing into the air stream).

CoilFluidArrangement IfcPropertyEnumeratedValue PEnum_CoilFluidArrangement

Fluid flow arrangement of the coil.

CrossCounterFlow: Air and water flow enter in different directions. CrossFlow: Air and water flow are perpendicular. CrossParallelFlow: Air and water flow enter in same directions.

CoilFaceArea IfcPropertySingleValue IfcAreaMeasure

Coil face area in the direction against air the flow.

HeatExchangeSurfaceArea IfcPropertySingleValue IfcAreaMeasure

Heat exchange surface area associated with U-value.

PrimarySurfaceArea IfcPropertySingleValue IfcAreaMeasure

Primary heat transfer surface area of the tubes and headers.

SecondarySurfaceArea IfcPropertySingleValue IfcAreaMeasure

Secondary heat transfer surface area created by fins.

TotalUACurves IfcPropertyTableValue IfcVolumetricFlowRateMeasure/IfcReal

Total UA curves, UA - air and water velocities, UA = [(C1 * AirFlowRate\^0.8)\^-1 + (C2 * WaterFlowRate\^0.8)\^-1]\^-1. Note: as two variables are used, DefiningValues and DefinedValues are null, and values are stored in IfcTable in the following order: AirFlowRate,WaterFlowRate,UA. The IfcTable is related to IfcPropertyTableValue using IfcMetric and IfcResourceConstraintRelationship.

WaterPressureDropCurve IfcPropertyTableValue IfcPressureMeasure/IfcVolumetricFlowRateMeasure

Water pressure drop curve, pressure drop – flow rate curve, WaterPressureDrop = f(WaterflowRate).

BypassFactor IfcPropertySingleValue IfcNormalisedRatioMeasure

Fraction of air that is bypassed by the coil (0-1).

SensibleHeatRatio IfcPropertySingleValue IfcNormalisedRatioMeasure

Air-side sensible heat ratio, or fraction of sensible heat transfer to the total heat transfer.

WetCoilFraction IfcPropertySingleValue IfcNormalisedRatioMeasure

Fraction of coil surface area that is wet (0-1).


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