WINDOWMATERIAL:DRAPE:EQUIVALENTLAYER

Specifies the properties of equivalent layer drape fabric materials. Shades are considered to be perfect diffusers (all transmitted and reflected radiation is hemispherically-diffuse) independent of angle of incidence. unpleated drape fabric is treated as thin and flat layer.

Name

Type: alphanumeric

Drape Beam-Beam Solar Transmittance at Normal Incidence

Type: real number
The beam-beam solar transmittance at normal incidence. This value is the same as the openness area fraction of the drape fabric. Assumed to be same for front and back sides.
Unit: dimensionless
Minimum: 0.0
Maximum: 0.2
Default: 0.0

Front Side Drape Beam-Diffuse Solar Transmittance

Type: real number
The front side beam-diffuse solar transmittance at normal incidence averaged over the entire spectrum of solar radiation. Assumed to be the same for front and back sides.
Unit: dimensionless
Minimum: 0

Back Side Drape Beam-Diffuse Solar Transmittance

Type: real number
The back side beam-diffuse solar transmittance at normal incidence averaged over the entire spectrum of solar radiation. Assumed to be the same for front and back sides.
Unit: dimensionless
Minimum: 0

Front Side Drape Beam-Diffuse Solar Reflectance

Type: real number
The front side beam-diffuse solar reflectance at normal incidence averaged over the entire spectrum of solar radiation.
Unit: dimensionless
Minimum: 0

Back Side Drape Beam-Diffuse Solar Reflectance

Type: real number
The back side beam-diffuse solar reflectance at normal incidence averaged over the entire spectrum of solar radiation.
Unit: dimensionless
Minimum: 0

Drape Beam-Beam Visible Transmittance

Type: real number
The beam-beam visible transmittance at normal incidence averaged over the visible spectrum of solar radiation. Assumed same for front and back sides.
Unit: dimensionless
Minimum: 0

Drape Beam-Diffuse Visible Transmittance

Type: real number
The beam-diffuse visible transmittance at normal incidence averaged over the visible spectrum range of solar radiation. Assumed to be the same for front and back sides.
Unit: dimensionless
Minimum: 0

Drape Beam-Diffuse Visible Reflectance

Type: real number
The beam-diffuse visible reflectance at normal incidence average over the visible spectrum range of solar radiation. Assumed to be the same for front and back sides.
Unit: dimensionless
Minimum: 0

Drape Material Infrared Transmittance

Type: real number
Long-wave transmittance of the drape fabric at zero openness fraction. Assumed same for front and back sides.
Unit: dimensionless
Minimum: 0
Default: 0.05

Front Side Drape Material Infrared Emissivity

Type: real number
Front side long-wave emissivity of the drape fabric at zero shade openness. Openness fraction specified above is used to calculate the effective emissivity value.
Unit: dimensionless
Default: 0.87

Back Side Drape Material Infrared Emissivity

Type: real number
Back side long-wave emissivity of the drape fabric at zero shade openness. Openness fraction specified above is used to calculate the effective emissivity value.
Unit: dimensionless
Default: 0.87

Width of Pleated Fabric

Type: real number
Width of the pleated section of the draped fabric. If the drape fabric is unpleated or is flat, then the pleated section width is set to zero.
Unit: m
Minimum: 0
Default: 0

Length of Pleated Fabric

Type: real number
Length of the pleated section of the draped fabric. If the drape fabric is unpleated or is flat, then the pleated section length is set to zero.
Unit: m
Minimum: 0
Default: 0