New glass coating technology reduces room temperature

On October 8th the UN's Intergovernmental Panel on Climate Change (IPCC) issued a report that said there was ample evidence that the Paris Agreement's target of controlling warming by 2C was no longer safe, let alone as high as 5C as it is now. To avoid a greater negative impact, humans should take faster and greater action to reduce emissions and limit global warming to 1.5 degrees Celsius in the 21st century.
the United Nations plans to approve a new agreement, kigali Amendment, in 2019 to
china
. It will further strengthen the Green Advocacy Agreement, which "cuts" the use of gases that cause warming in refrigerators, air conditioners and other products around the world.
even if air conditioners no longer add HCFCs (CFCs), they consume electricity and emit large amounts of hot gas, adding to the heat of the hot summer. Researchers at the Massachusetts Institute of Technology and the University of Hong Kong have developed a new type of window paint that they hope will automatically lower the temperature of their homes and reduce their reliance on air conditioning.
this window coating remains absolutely transparent in environments below 32 degrees C, and when the temperature exceeds this threshold, it automatically gives off a translucent texture like frosted glass. With this change, it is able to block up to 70% of the sun's heat, reducing indoor temperature and air conditioning load.
to maximize heat, the researchers inserted a large number of 500 nanometer diameter water-filled spheres into standard polymeric materials. At about 29 degrees C, the sphere begins to contract, squeezing out the liquid and forcing the polyester to get closer. This gives the glass a matte appearance, blocking heat while ensuring that enough visible light is still visible in the room.
to test the material's role, the team created a small laboratory and irradiated it with a solar simulator. Under normal circumstances, the scorching of the solar simulator raises the room temperature to 39 degrees C, and after applying the insulation film, the room temperature drops to 34 degrees C. Researchers say that while this may seem unlikely, it will also significantly reduce the power consumption of air conditioners, thereby reducing coal-fired power pollution.
the film is similar to a household cling film, so it can be easily applied to any window. "One of the biggest advantages of this research and development is the use of common materials, which increases the suitability of the product and makes manufacturing more difficult." "It's very important for us to be a professor of mechanical engineering at the University of Hong Kong, " said Nie Xiaobo, a professor of mechanical engineering at the University of Hong Kong. The researchers are also adjusting the formulation of the film to try to further improve thermal insulation. At present, the research results are still some distance from mass production and sales.
to reduce room temperature by filming windows is just one of many studies in recent years. In July, media reported that Chinese materials engineers had developed a new type of window coating that regulates both temperature and power generation.
, a professor of materials and engineering at South China University of Technology, developed a coating that filters out infrared wavelengths while allowing light to shine and converts solar energy into electricity, the South China University of Technology reported. The material of this coating is much more complex and difficult to make than the "cling film" material mentioned above.
This coating contains translucent photovoltaic cells that allow visible light to pass through the coating and filter out heat-capable infrared wavelengths, reducing the building's reliance on heating and cooling systems by 50 percent, and allowing the building to get energy from the near-infrared light of the sun. Similarly, the results of this research remain at the laboratory level, far from mass manufacturing and production.