IFC 4.3.1.0 (IFC4X3_ADD1) development

7.5.4.18 Pset_CoilTypeHydronic

7.5.4.18.1 Semantic definition

Hydronic coil type attributes.

7.5.4.18.2 Applicable entities

7.5.4.18.3 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 IfcPropertyConstraintRelationship.

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).

Table 7.5.4.18.A

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7.5.4.18.4 Changelog

7.5.4.18.4.1 IFC4

7.5.4.18.4.2 IFC4.3_DEV_9f90c1f0