A research team led by Nanyang Technological University (NTU) in Singapore has discovered an energy-saving “self-adapting” glass substance that can heat or cool rooms.
According to a study published in the journal Science, glass is believed to automatically respond to changes in temperature by switching between heating and cooling.
Composite layers of vanadium dioxide nanoparticles, poly (methyl methacrylate) (PMMA) and a low emissivity coating were used to create its unusual structure.
Energy-saving glass, which contains no electrical components, works by using the light spectra that cause heating and cooling.
It cools the room by removing solar heating (near infrared light) and improving radiative cooling (long wave infrared) – a natural phenomenon in which heat radiates through surfaces to the cold universe.
It has the opposite effect in winter, warming the room.
Laboratory experiments using an infrared camera to visualize the results indicated that glass allowed a controlled amount of heat in various situations (room temperature – above 70 ° C), demonstrating its ability to dynamically adapt to changing weather conditions. , according to the team.
According to US Department of Energy data, window energy use (heating and cooling) in buildings accounts for about 4% of total primary energy use in the United States each year.
Scientists have devised sustainable solutions to reduce this energy consumption, such as low-emissivity coatings that inhibit heat transfer and electrochromic glass that tints to regulate solar transmission in the room.
However, so far none of the methods could control both heating and cooling, according to study co-authors from the University of Wyoming in the United States and the University of Science and Technology. from Wuhan, China.
(With contributions from agencies)