Employees of Nanyang Technological University (Singapore) presented a prototype of a “smart window” with a glass unit filled with a mixture of hydrogel, water and a stabilizing compound.
In the daytime, sunlight passing through such a window heats up the liquid, which in turn retains and retains this heat, not allowing it to enter the room. As it heats up, the smart window glass turns from transparent to matte. This keeps the room cool without the need for an air conditioner.
As the sun sets, the gel cools down, the window becomes transparent again, and the heat accumulated during the day through the inner glass heats the room, reducing the load on the heating system. Another advantage of a smart window is a high sound absorption rate, which is 15% higher than that of conventional glass units.
Testing a Singapore Smart Window found that it can reduce energy consumption in office buildings by up to 45%. A similar solution has already been developed in the UK.