Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
ok, so the best i came up with is:
1) use sketchup to place skylights of type TubularDaylightDome in the roof and "skylights" of type TubularDaylightDiffuser int eh zone to be daylighted.
2) create and assign all necessary constructions within OS (or how ever you prefer). Here are the materials and constructions from the TDD example idf file (i did not verify these properties):
Construction,
TDD Pipe, !- Name
Very High Reflectivity Surface; !- Outside Layer
Construction,
TDD Dome, !- Name
Clear Acrylic Plastic; !- Outside Layer
Construction,
TDD Diffuser, !- Name
Diffusing Acrylic Plastic; !- Outside Layer
WindowMaterial:Glazing,
Clear Acrylic Plastic, !- Name
SpectralAverage, !- Optical Data Type
, !- Window Glass Spectral Data Set Name
0.003, !- Thickness {m}
0.92, !- Solar Transmittance at Normal Incidence
0.05, !- Front Side Solar Reflectance at Normal Incidence
0.05, !- Back Side Solar Reflectance at Normal Incidence
0.92, !- Visible Transmittance at Normal Incidence
0.05, !- Front Side Visible Reflectance at Normal Incidence
0.05, !- Back Side Visible Reflectance at Normal Incidence
0.00, !- Infrared Transmittance at Normal Incidence
0.90, !- Front Side Infrared Hemispherical Emissivity
0.90, !- Back Side Infrared Hemispherical Emissivity
0.90; !- Conductivity {W/m-K}
WindowMaterial:Glazing,
Diffusing Acrylic Plastic, !- Name
SpectralAverage, !- Optical Data Type
, !- Window Glass Spectral Data Set Name
0.0022, !- Thickness {m}
0.90, !- Solar Transmittance at Normal Incidence
0.08, !- Front Side Solar Reflectance at Normal Incidence
0.08, !- Back Side Solar Reflectance at Normal Incidence
0.90, !- Visible Transmittance at Normal Incidence
0.08, !- Front Side Visible Reflectance at Normal Incidence
0.08, !- Back Side Visible Reflectance at Normal Incidence
0.00, !- Infrared Transmittance at Normal Incidence
0.90, !- Front Side Infrared Hemispherical Emissivity
0.90, !- Back Side Infrared Hemispherical Emissivity
0.90; !- Conductivity {W/m-K}
Material,
Very High Reflectivity Surface, !- Name
Smooth, !- Roughness
0.0005, !- Thickness {m}
237, !- Conductivity {W/m-K}
2702, !- Density {kg/m3}
903, !- Specific Heat {J/kg-K}
0.90, !- Thermal Absorptance
0.05, !- Solar Absorptance
0.05; !- Visible Absorptance
3) use this measure to assign daylighting control objects
4) create an idf snippet with all the necessary pipe objects defined and use this measure to insert the idf text in to the output idf. Pipe definitions should be like:
DaylightingDevice:Tubular,
TDD_Pipe_61, !- Name
TDD_Dome_61, !- Dome Name
TDD_Diff_61, !- Diffuser Name
TDD Pipe, !- Construction Name
0.5334, !- Diameter {m}
1.0, !- Total Length {m}
0.28, !- Effective Thermal Resistance {m2-K/W}
Thermal Zone: C_Plenum_F2, !- Transition Zone 1 Name
0.66; !- Transition Zone 1 Length {m}
| | 2 | No.2 Revision |
ok, so the best i came up with is:
1) use sketchup to place skylights of type TubularDaylightDome in the roof and "skylights" of type TubularDaylightDiffuser int eh zone to be daylighted.
2) create and assign all necessary constructions within OS (or how ever you prefer). Here are the materials and constructions from the TDD example idf file (i did not verify these properties):
Construction,
Construction,
TDD Pipe, !- Name
Very High Reflectivity Surface; !- Outside Layer
Construction,
Construction,
TDD Dome, !- Name
Clear Acrylic Plastic; !- Outside Layer
Construction,
Construction,
TDD Diffuser, !- Name
Diffusing Acrylic Plastic; !- Outside Layer
WindowMaterial:Glazing,
WindowMaterial:Glazing,
Clear Acrylic Plastic, !- Name
SpectralAverage, !- Optical Data Type
, !- Window Glass Spectral Data Set Name
0.003, !- Thickness {m}
0.92, !- Solar Transmittance at Normal Incidence
0.05, !- Front Side Solar Reflectance at Normal Incidence
0.05, !- Back Side Solar Reflectance at Normal Incidence
0.92, !- Visible Transmittance at Normal Incidence
0.05, !- Front Side Visible Reflectance at Normal Incidence
0.05, !- Back Side Visible Reflectance at Normal Incidence
0.00, !- Infrared Transmittance at Normal Incidence
0.90, !- Front Side Infrared Hemispherical Emissivity
0.90, !- Back Side Infrared Hemispherical Emissivity
0.90; !- Conductivity {W/m-K}
WindowMaterial:Glazing,
WindowMaterial:Glazing,
Diffusing Acrylic Plastic, !- Name
SpectralAverage, !- Optical Data Type
, !- Window Glass Spectral Data Set Name
0.0022, !- Thickness {m}
0.90, !- Solar Transmittance at Normal Incidence
0.08, !- Front Side Solar Reflectance at Normal Incidence
0.08, !- Back Side Solar Reflectance at Normal Incidence
0.90, !- Visible Transmittance at Normal Incidence
0.08, !- Front Side Visible Reflectance at Normal Incidence
0.08, !- Back Side Visible Reflectance at Normal Incidence
0.00, !- Infrared Transmittance at Normal Incidence
0.90, !- Front Side Infrared Hemispherical Emissivity
0.90, !- Back Side Infrared Hemispherical Emissivity
0.90; !- Conductivity {W/m-K}
Material,
Material,
Very High Reflectivity Surface, !- Name
Smooth, !- Roughness
0.0005, !- Thickness {m}
237, !- Conductivity {W/m-K}
2702, !- Density {kg/m3}
903, !- Specific Heat {J/kg-K}
0.90, !- Thermal Absorptance
0.05, !- Solar Absorptance
0.05; !- Visible Absorptance
3) use this measure to assign daylighting control objects
4) create an idf snippet with all the necessary pipe objects defined and use this measure to insert the idf text in to the output idf. Pipe definitions should be like:
DaylightingDevice:Tubular,
DaylightingDevice:Tubular,
TDD_Pipe_61, !- Name
TDD_Dome_61, !- Dome Name
TDD_Diff_61, !- Diffuser Name
TDD Pipe, !- Construction Name
0.5334, !- Diameter {m}
1.0, !- Total Length {m}
0.28, !- Effective Thermal Resistance {m2-K/W}
Thermal Zone: C_Plenum_F2, !- Transition Zone 1 Name
0.66; !- Transition Zone 1 Length {m}
