Jäähdytyskalvot

Jäähdytyskalvot, known in English as cooling films or radiative cooling films, are advanced materials designed to reduce the temperature of surfaces they are applied to by emitting thermal radiation to the coldness of outer space. These films are typically composed of multiple layers of specialized polymers and often incorporate nanoparticles or microstructures. The key principle behind their operation is selective thermal emission, meaning they are highly transparent to solar radiation but highly emissive in the atmospheric infrared window, which spans wavelengths where Earth's atmosphere is largely transparent. This allows heat to escape directly into space, even during the daytime.

The development of jäähdytyskalvot is a significant advancement in passive cooling technologies. Unlike conventional cooling methods that require energy input, such as air conditioning, radiative cooling films operate without electricity. This makes them a sustainable and environmentally friendly solution for reducing energy consumption associated with cooling buildings, vehicles, and electronic devices. Applications range from improving the energy efficiency of buildings by coating roofs and walls to cooling solar panels, thereby increasing their performance, and even to extending the shelf life of temperature-sensitive goods during transportation. Research continues to optimize their performance, durability, and cost-effectiveness for wider adoption.