Cooling and heating window film using solar energy

Solar window film on a buildning

Researchers at the Chalmers University of Technology have developed a window film that captures the energy from sunrays, utilizes the heat and distributes it evenly throughout a longer period of time. During hot summer days, the energy is saved only to be gradually released at sunset, creating a pleasant indoor climate even when the sun is at its hottest. "Why not make the most of the energy that we get free of charge instead of trying to fight it,” says chemist Kasper Moth-Poulsen, who is leading the research.

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