Smart windows – Transmittance tuned thermochromic coatings for dynamic control of building performance

Environmental Benefits of Thermochromic VO2Windows: Life Cycle Assessment from Laboratory Scale to Industrial Scale

“…This city has been selected for the first analysis because it was the one showing the higher energy savings in the use phase. [11] The energy demands and the climate change impact for each input in the W-doped VO 2 and film productions are collected in Table 6 to analyze the inputs that cause higher impacts. It can be seen that the most significant impacts in the W-doped VO 2 laboratory production inputs were in order of importance: the voltage electricity, the V 2 O 5 , and the oxalic acid.…”

“…The LCI of the STD window had only two inputs, which were the electricity (cooling and lighting) and heat demands of the office room. The room energy demand data have been collected from a previous work by Aburas et al [ 11 ] in which they numerically calculate the energy demand of an office room with a STD window and a VO 2 ‐based TC window. [ 11 ] The cooling and lighting demands were assigned to electricity generation (low voltage), while the heating demands were related to natural gas source.…”

“…The room energy demand data have been collected from a previous work by Aburas et al [ 11 ] in which they numerically calculate the energy demand of an office room with a STD window and a VO 2 ‐based TC window. [ 11 ] The cooling and lighting demands were assigned to electricity generation (low voltage), while the heating demands were related to natural gas source. The reference flow was the window surface.…”

“…[ 9 ] Moreover, the optical properties modulation is primarily in the infrared region and the transition temperature can be lowered down to 25 °C or even lower temperatures. [ 2,10 ] These features have been numerically [ 11,12 ] and experimentally [ 13,14 ] implemented in model buildings to demonstrate the energy efficiency potential gain. It has been shown to be particularly interesting for windows because the VO 2 can provide a constant transmittance in the visible region while the infrared radiation is modulated, and thus the visible light transmittance is maintained.…”

A Review of Smart and Responsive Building Technologies and their Classifications

“…It is possible to change this behaviour using different dopants such as the Tungsten, to low the transition temperature, or Magnesium to act on the VL Transmittance. Energy savings related to TC windows ranges between 7% and 46% (Aburas et al 2021) and, nowadays, researchers are focusing mainly on multifunctional TC windows coupling the TCs with electrochromic, electrothermal or photochromic behaviour (Ke et al 2019) to further improve these values.…”