Electrochromic Materials

Simulations of a Typical Office Installation

The following simulations show the effects of different glazings on video display terminal glare, etc., etc.

Video Display @ 9:00 am
(122 K)

Room Elevation @ 9:00 am
(115 K)

Clear vs. Tinted vs. Electrochromic
(96 K)

Video Display @ 3:00 pm
(107 K)

Room Elevation @ 3:00 pm
(128 K)

Window from Exterior @ 3:00 pm
(128 K)

About the Office Animation

Physical Setup of the Office and Simulation

  • Office room dimensions: 10 feet wide (N-S) by 20 feet long (E-W)
  • Glazing Clear opening dimensions: 10 feet by 5.75 feet
  • West facing glazing three floors above street level
  • CIE Clear skies with direct sun
  • Building located in San Francisco (37.8 N latitude, 122.4 W longitude) in a mid-rise, office/industrial neighborhood
  • Electrochromic device time sequence and spectral transmittance and reflectance measurements based 1 foot square prototype Tungsten Oxide (WO3) devices provided by industry-leading glazing manufacturers.
  • Dynamic exposure compensation with pcond foveal-weighted averaging applied to each frame

Electrochromic Office Animation
(3.8 MB MPG)

Sequence of Events
  1. 15:00:00, sun obscured by a cloud, glass at full transmittance: Tvis=74%
  2. 15:00:03, cloud moves away and direct sun enters the office
  3. 15:00:12, electrochromic glazing begins to color at its maximum rate
  4. 15:04:06 through 15:17:42, video is in 10X time lapse to prevent boredom
  5. 15:17:42, electrochromic glazing reaches its maximum coloration: Tvis=3.2%
  6. 15:17:48, the cloud moves in front of sun obscuring all direct sun
  7. 15:17:54, electrochromic glazing begins to bleach at its maximum rate
  8. 15:22:18, electrochromic glazing reaches its maximum bleached: Tvis=74%

Animation Simulation Parameters