AIRFLOWNETWORK:DISTRIBUTION:COMPONENT:DUCT

This object defines the relationship between pressure and air flow through the duct.

Name

Type: alphanumeric
Enter a unique name for this object.

Duct Length

Type: real number
Enter the length of the duct.
Unit: m

Hydraulic Diameter

Type: real number
Enter the hydraulic diameter of the duct. Hydraulic diameter is defined as 4 multiplied by cross section area divided by perimeter
Unit: m

Cross Section Area

Type: real number
Enter the cross section area of the duct.
Unit: m2

Surface Roughness

Type: real number
Enter the inside surface roughness of the duct.
Unit: m
Default: 0.0009

Coefficient for Local Dynamic Loss Due to Fitting

Type: real number
Enter the coefficient used to calculate dynamic losses of fittings (e.g. elbows).
Unit: dimensionless
Minimum: 0.0
Default: 0.0

Heat Transmittance Coefficient (U-Factor) for Duct Wall Construction

Type: real number
Conduction only Default value of 0.943 is equivalent to 1.06 m2-K/W (R6) duct insulation.
Unit: W/m2-K
Default: 0.943

Overall Moisture Transmittance Coefficient from Air to Air

Type: real number
Enter the overall moisture transmittance coefficient including moisture film coefficients at both surfaces.
Unit: kg/m2
Default: 0.001

Outside Convection Coefficient

Type: real number
Optional. convection coefficient calculated automatically, unless specified
Unit: W/m2-K

Inside Convection Coefficient

Type: real number
Optional. convection coefficient calculated automatically, unless specified
Unit: W/m2-K