White coatings have high sunlight reflectivity and radiant cooling capacity. After painting, the total reflectivity of sunlight can reach 96%, of which the infrared reflectivity of 8~13 micron wavelength can reach more than 93.5%. At the same time, the coating can radiate heat to the surroundings at a high power of 100 watts per square meter.
The temperature control technology of white coatings in low energy consumption and low environmental load is becoming a research hotspot. Among them, the reflected radiation technology does not consume energy, and the reflected infrared rays can well penetrate the atmosphere and return to space, helping to reduce the carbon load of human activities.
The effect of the comparative test is very significant. The typical experimental environment set by the research team is 10 a.m. to 1 p.m., with direct sunlight outside. The widely used titanium white paint covers models with surface temperatures above ambient temperatures, zui as high as 6.3°C, and average 3.6°C higher. The surface temperature of the model sprayed with energy-saving paint is lower than the ambient temperature, and the zui height is reduced by 8.8°C, and the average reduction is 5.5°C.
