OPSC Top Ten

1
OPSC Top Ten

• Tucson
• March 2009

2
Most Important technical tasks?

• Test procedure for diffuse glazing materials
• Enable laminates with embedded coatings in
  Optics5
• Angle-dependence specific to coating type
• Upgrade checker tool
• Model for honeycomb shades
• Model for regular shade screens
• Allow the use of emissometers
• ILC for diffuse materials and attachments
• Antireflection coatings
• Solar spectral irradiance

3
Documents are not the same as tasks

• Reapprove 300
• Adopt new FTIR-based standard to replace 301
• Modify 302 to better manage calculated data
• 303 and 304 probably ok if referenced by improved
  302
• International harmonization

4
Nonspecular Glazing Materials

• One of two top priorities identified by glazing
  manufacturers
• Also relevant to attachment materials
• Fritted glass and diffuse laminates are widely
  used in commerical buildings
• How important is pattern glass?
• Specular measurement techniques prone to error
  for scattering materials
• Experimental study with spectrophotometer,
  goniometer and 2-meter sphere
• Combination study comparing raytracing and W6
• Participation in ICG TC10
• Harmonization with CEN/ISO

5
Laminates with Embedded Coatings

• One of two top priorities identified by glazing
  manufacturers
• Short-term fix laborious addition of single
  records
• Long-term solution modify Checker
• Issues of review and verification similar to
  other currently allowed calculated data such as
  applied films and ordinary laminates 

6
Angle-dependence Improvements

• angle dependence of specular glazing now
  important for CMA? Mentioned last meeting.
• Current uncoated glass model in W5 based on
  fundamentals
• Current coated glass model two-state has only two
  states
• CEN/ISO may use ADOPT

7
Honeycomb Shades

• Honeycombs identified by Attachments as high
  priority
• Slat shading already implemented in W6 (Venetian
  model by  Charlie Curcija)
• Similar approach to Venetian model could be
  followed

8
Woven Shade Model

• Shades identified by Attachments as high priority
• For shade materials with regular grid structure a
  W6 internal model already exists (by Ross
  McCluney)
• Not as well tested as the Venetian model
• Irregular as well as regular can be measured now
  for direct entry

9
Emissometer ILC 1994