When MIT researchers aren’t working on Roboat, a fully autonomous robotic boat, some are busy developing a passive cooling system that doesn’t require electricity to run. More specifically, the system provides a way to use passive cooling to preserve food crops while supplementing conventional air conditioners in buildings, without requiring electricity and only a small need for water.
This system essentially combines radiative and evaporative cooling with thermal insulation, all encapsulated in a slim package that resembles existing solar panels. It can provide up to 19° Fahrenheit (9.3° Celsius) of cooling from the ambient temperature, or just enough for safe food storage for about 40% longer under very humid conditions. If used in dryer conditions, it could possibly even triple the safe storage time.
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This technology combines some of the good features of previous technologies such as evaporative cooling and radiative cooling. [By using this combination], we show that you can achieve significant food life extension, even in areas where you have high humidity, [which limits the capabilities of conventional evaporative or radiative cooling systems],” said Zhengmao Lu, MIT postdoc.
