Recreating the natural phenomenon of radiative cooling through unique optical design.
Contributing to a carbon-neutral society with world-class radiative cooling performance.
SPACECOOL Radiative Cooling Technology
Advantages of a Multi-Layered Structure
It achieves both a heat-shielding function, which reflects solar heat and minimizes heat absorption (reflectance: ~95%), and a radiative cooling function, which releases absorbed heat into space as infrared radiation within the “atmospheric window” wavelength range (emissivity: ~95%).
※”Heat shielding” refers to blocking light energy, such as solar radiation, through reflection.
※When light strikes a material, it undergoes either reflection, radiation, or transmission (reflectance + emissivity + transmittance = 100%). Achieving both high reflectance and high emissivity has traditionally been challenging.
※When light strikes a material, it undergoes either reflection, radiation, or transmission (reflectance + emissivity + transmittance = 100%). Achieving both high reflectance and high emissivity has traditionally been challenging.
Heat Transfer to Outer Space Utilizing the Atmospheric Window Wavelengths
The heat energy accumulated on the Earth’s surface due to solar absorption is converted into light energy within the wavelengths of the “atmospheric window” and transferred to the cold outer space at -270°C.
What Is the Atmospheric Window?
Light has wavelengths that vary in their ability to pass through the atmosphere—some have high transmittance, while others are easily absorbed by the atmosphere.
To transport heat into space in the form of light energy, wavelengths with high atmospheric transmittance are ideal. Among these, the 8–13 μm wavelength range is particularly transmissive and is referred to as the “atmospheric window.”
To transport heat into space in the form of light energy, wavelengths with high atmospheric transmittance are ideal. Among these, the 8–13 μm wavelength range is particularly transmissive and is referred to as the “atmospheric window.”
