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Mbadachusetts Institute of Technology (MIT) scientists, including a native of India, develop a cooling device that should work without electricity.
How cool is that?
MIT scientists have developed a cooling device that can store food and medicine in hot places that have feeding problems. In remote areas where electricity or energy produced from fossil fuels is non-existent, this brilliant device can dramatically reduce gambling.
THE SYSTEM
The System designed allows the emission of mid-infrared heat. of light that can directly cross the atmosphere and radiate in the cold of space.
MIT scientists, including one of Indian origin, developed a cooling device that can store food and medicine in hot, isolated places without electricity or energy from fossil fuels.
Two versions of the device designed by MIT researchers, using a metal band to block direct sunlight | Photo of Bikram Bhatia via the MIT website
To avoid any heating up in direct sunlight, a small metal band hanging over the camera blocks the direct rays of the Sun.
Take the example of Boston, in the United States, where the temperature remains low. At around 28 degrees Celsius in summer (June to August), the cooling unit could theoretically provide cooling down to 20 degrees Celsius below ambient temperature. Until now, in their first validation tests, they had reached a cooling of six degrees Celsius.
OTHER COOLING DEVICES
Other groups have attempted to design pbadive cooling systems that emit heat. in the form of infrared wavelengths of light, but these systems are based on sophisticated complex photonic devices that can be expensive to manufacture and not readily available for widespread use.
The devices are complex because they are designed to reflect all the wavelengths of sunlight almost perfectly and usually emitting only radiation in the middle infrared. This combination of selective reflectivity and emissivity requires a multilayer material whose layer thicknesses are controlled with nanometer precision.
"We built the configuration and carried out outdoor experiments on a roof of MIT.It was performed with very simple materials and clearly showed the effect Bikram Bhatia, a researcher at the Mbadachusetts Institute of Technology (MIT) in the United States, declared.
Regional advantages and disadvantages
A limiting factor for the system is the humidity of the atmosphere, which can block some of the infrared emission in the air.
In a place like Boston, near the ocean and relatively wet, this limits the total amount of cooling that can be Obtained, which limits it According to the researchers,
However, in drier deserts or arid environments around the world, the maximum achievable cooling could actually be much greater, up to 40 degrees Celsiu The research on radiative cooling is focused on larger systems that can be used to cool rooms or entire buildings, this approach is more localized, said Evelyn Wang, a professor at MIT. .
(PTI Entries)
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