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Refrigeration is the action of creating cooling conditions by removing heat. It is used for preserving food by slowing bacteria growth.
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Refrigerators today work by evaporating liquids.
The liquids are pushed through the refrigerator through tubes and begin to vaporize. As the liquids evaporate, they carry heat away with them as the gases travel to a coil outside the refrigerator. Here the heat is released. The gases return to a compressor, where they become liquid again, restarting the cycle.
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New technologies in refrigeration include solid-state refrigerators and refrigerators that use magnets.
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