Passive Cooling System Beams Heat into Space

Passive Cooling System Beams Heat into Space
A passive cooling system that absorbs heat and sends it into outer space could provide an electricity-free way to keep buildings cool in urban environments.

The device was developed by a team from the University at Buffalo, and relies on an inexpensive polymer/aluminum film inside a box that is then placed within a solar shelter designed by the team. The film absorbs the ambient heat from the air, while the solar shelter keeps the surroundings cool and emits the heat into space as thermal radiation. According to lead researcher Qiaoqiang Gan, a key design element of the device is that it can beam the thermal radiation in a narrow pathway, which is important in urban areas surrounded by tall buildings.

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