E' interessante vedere come saranno i frigoriferi del futuro. Le alternative sono: il frigo ad aria compressa..
A closed cycle (ie, a sealed system similar to a traditional refrigerator) can be more efficient than an open one, but that efficiency requires the air to be pressurised to a much higher level.
..oppure il frigo acustico..
Another new technique abandons even that. Sound is normally thought of as a pressure wave. But, like any other pressure change, it also brings a change in temperature. In an ordinary conversation, that temperature change is a mere ten-thousandth of a degree. But a loud sound in a pressurised gas can cause significant temperature changes.
..oppure (last but not least) il frigo magnetico..
It has been known for a long time that certain substances heat up when placed in a magnetic field, and cool down when the field is removed. Unfortunately, this effect is large enough to be useful only in a handful of rather exotic materials, most notably alloys of gadolinium
Non vorrei sembrare luddista, ma avere in casa delle leghe di gadolinio mi spaventa un po'. [Economist]
10:30:11 PM
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