cold-air machine

cold-air machine

[′kōld ¦er mə‚shēn]
(mechanical engineering)
A refrigeration system in which air serves as the refrigerant in a cycle of adiabatic compression, cooling to ambient temperature, and adiabatic expansion to refrigeration temperature; the air is customarily reused in a closed superatmospheric pressure system. Also known as dense-air system.
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