Visual quality assessment of electrochromic and conventional glazings

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Variable transmission, ``switchable`` electrochromic glazings are compared to conventional static glazings using computer simulations to assess the daylighting quality of a commercial office environment where paper and computer tasks are performed. RADIANCE simulations were made for a west-facing commercial office space under clear and overcast sky conditions. This visualization tool was used to model different glazing types, to compute luminance and illuminance levels, and to generate a parametric set of photorealistic images of typical interior views at various times of the day and year. Privacy and visual display terminal (VDT) visibility is explored. Electrochromic glazings result in a more consistent ... continued below

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29 p.

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Moeck, M.; Lee, E.S.; Rubin, M.D.; Sullivan, R. & Selkowitz, S.E. September 1, 1996.

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Description

Variable transmission, ``switchable`` electrochromic glazings are compared to conventional static glazings using computer simulations to assess the daylighting quality of a commercial office environment where paper and computer tasks are performed. RADIANCE simulations were made for a west-facing commercial office space under clear and overcast sky conditions. This visualization tool was used to model different glazing types, to compute luminance and illuminance levels, and to generate a parametric set of photorealistic images of typical interior views at various times of the day and year. Privacy and visual display terminal (VDT) visibility is explored. Electrochromic glazings result in a more consistent glare-free daylit environment compared to their static counterparts. However, if the glazing is controlled to minimize glare or to maintain low interior daylight levels for critical visual tasks (e.g, VDT), occupants may object to the diminished quality of the outdoor view due to its low transmission (Tv = 0.08) during those hours. RADIANCE proved to be a very powerful tool to better understand some of the design tradeoffs of this emerging glazing technology. The ability to draw specific conclusions about the relative value of different technologies or control strategies is limited by the lack of agreed upon criteria or standards for lighting quality and visibility.

Physical Description

29 p.

Notes

OSTI as DE97004166

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  • 15. SPIE international symposium on optical materials technology for energy efficiency and solar energy conversion, Freiburg (Germany), 16-19 Sep 1996

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  • Other: DE97004166
  • Report No.: LBNL--39471
  • Report No.: CONF-9609325--4
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 474886
  • Archival Resource Key: ark:/67531/metadc682259

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • April 5, 2016, 4:54 p.m.

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Moeck, M.; Lee, E.S.; Rubin, M.D.; Sullivan, R. & Selkowitz, S.E. Visual quality assessment of electrochromic and conventional glazings, article, September 1, 1996; California. (digital.library.unt.edu/ark:/67531/metadc682259/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.