You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
23 August 1995Spectral selectivity of electrochromic windows with color state for all-sky conditions
The optical performance of an electrochromic window is found to deviate with window color state and with sky condition from clear to cloudy. A new spectral cloud model ALLSKY1 (Soule) is developed and applied to an electrochromic window recently developed at NREL (Zhang and Benson). A comparison in spectral selectivity also is made between the electrochromic window and spectrally selective standard windows. Two series of double- glazed window sections, including the electrochromic window with color state and a series of standard windows with spectral selectivity, were measured for transmittance and reflectance (300 - 2500 nm). A new near-infrared blocking factor, that depends strongly on sky conditions, is developed for warm-climate window applications with cooling load reduction. The color shifts of both the incident daylight spectra from clear to cloudy and the electrochromic window with color state are studied with a chromaticity analysis (CIE 1931 2 degrees). Computed daylight correlated color temperatures show a wide range, with values of 5660 K for clear global irradiation, 6210 K for clouds, and 13,250 K for a zenith blue sky. Chromatic trajectories with color state for transmitted radiation extend further toward the blue to 8180 K for the global and 28,990 K for the zenith sky irradiation.
The alert did not successfully save. Please try again later.
David E. Soule, Ji-Guang Zhang, David K. Benson, "Spectral selectivity of electrochromic windows with color state for all sky conditions," Proc. SPIE 2531, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIV, (23 August 1995); https://doi.org/10.1117/12.217339