28 Sep '15, 3pm

How magnets could bring us closer to energy-free refrigeration

So how can magnets bring us closer to energy-free refrigeration? The atoms making up a piece of metal, once allowed to roam freely, start to align in one direction when in the presence of a magnet and its magnetic field. This loss of entropy creates a vibration – better known as “heat” – meaning that magnets in action are producing warmth on a molecular level. This magnetocaloric effect is mild in many metals, but some really get toasty, such as gadolinium.

Full article: http://inhabitat.com/how-magnets-could-bring-us-closer-to...

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