The Effect of Smart Colored Windows on Visual Performance of Buildings

Abstract

The photochromic coating is a promising smart technology that provides different optical properties in response to daylight variations. The application of photochromic coatings with various colors/shades on window glass is one of the current research approaches for finding better energy saving techniques. The aim of this study was to develop a series of photochromic coatings for window glass and measure the impact of such smart technologies on occupants’ visual comfort. This paper examines the visual performance of building facades that utilize windows with different photochromic-coated glass. The visual performance data of three window types coated with nine different photochromic color shades were considered and compared to determine the best photochromic shades and window types that provide optimum visual metrics for the inside of the building. The results show that compared to no-coating glass, both the Daylight Glare Probability and the Useful Daylight Illuminance could be improved by using multi-color coatings that contain equal or different color proportions for photochromic window glass. From an energy-saving point of view, the results indicate that the windows coated with photochromic materials provide a better alternative to the no-coating window products.

Breaking 1.7 V Open Circuit Voltage in Large Area Transparent Perovskite Solar Cells Using Interfaces Passivation

“…Nevertheless, our devices are still interesting for environmental design and BIPV products where the coloration represents an additional value. [47] Preliminary results (Figure S32, Supporting Information) demonstrate the uniform and scalable deposition of the full stack using blade coating deposition technique. [48] showing an improved CRI (up to 78.4%) obtained by adjusting the perovskite thickness (<100 nm) and its halide composition.…”

Special Issue on Innovative Circular Building Design and Construction

“…Matin et al discussed "the Effect of Smart Colored Windows on the Visual Performance of Buildings" [6]. In this study, photochromic coatings for window glass were developed, and the influence of such intelligent technologies on the visual comfort of occupants was assessed.…”

A Comparative Study on Smart Windows Focusing on Climate-Based Energy Performance and Users’ Comfort Attributes

“…The more tungsten trioxide absorbs H 2 , the more a gasochromic window will become more tinted. Exposing WO 3 to oxygen causes the GC window recovers its transparency [12,40,[94][95][96]. The performance of GC windows can be improved by decreasing responding time by injecting water into the structure of the WO 3 and making the chemochromic film more porous [39].…”

“…Thermochromic (TC) windows are categorized as passive smart windows using thermochromic coatings, containing vanadium oxide (VO 2 ). TC windows modify the heat intensity and infrared solar rays (IR) inside the building when the environment's temperature exceeds TC coating's transition temperature resulting in window's color tint alterations [43,61,97]. The sunlight collides with VO 2 molecules and causes light rays refraction, which alters solar rays' wavelength resulting in building's heat gain reduction.…”