Cool Roof Technology_Cool Roof Paint
Chemists have developed thermo-regulating paint to improve the energy efficiency of old buildings, which accumulates heat from radiators during the day and releases it at night, slowing down cooling and losses.
In cities for space heating and cooling has to half of the annual energy consumption. At the same time, most buildings are old and have poor thermal insulation, so they are up to 40% of total energy consumption.
As part of the European ENERPAINT project, a paint additive has been developed that contains phase change materials (salt hydrates) packed in polymer capsules up to 10 nm in size to protect them from environmental contact and degradation. Due to their physical properties, salt hydrates can store more energy per unit volume and also respond to heat in a controlled manner.
When applied to a surface together with a helmet, nanocapsules on during the day they absorb the heat generated by the walls and retain it, turning into a liquid state, and on cold nights they crystallize, release heat and heating the building.
The additive is currently in the testing phase, but the developers say European, Chinese and Russian companies are already showing interest in their research..
In the future, the team also wants to create supplements for paints that will help cool buildings. However, earlier the company SolCold reported that it is also developing a two-layer a coating that, after being applied to a surface, cools an object under the influence of sunlight.
text: Ilya Bauer, photo: AM Technology