vapor-compression cycle

vapor-compression cycle

[′vā·pər kəm′presh·ən ‚sī·kəl] (mechanical engineering) A refrigeration cycle in which refrigerant is circulated through a machine which allows for successive boiling (or vaporization) of liquid refrigerant as it passes through an expansion valve, thereby producing a cooling effect in its surroundings, followed by compression of vapor to liquid.