Magnetic refrigeration technology could use 20-30 percent less energy than traditional gas-compression fridges and air conditioners used today. But the material needed to make them work hasn't been determined.
Now a step has been made toward figuring out what materials will work best.
A magnetic refrigeration system works by applying a magnetic field to a magnetic material — some of the most promising being metallic alloys — causing it to heat up. This excess heat is removed from the system by water, cooling the material back down to its original temperature. When the magnetic field is removed the material cools down even further, and it is this cooling property that researchers hope to harness for a wide variety of cooling applications.
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