What is the vapor-compression refrigeration cycle?

The vapor-compression refrigeration cycle is a widely used method for cooling spaces and preserving food by making a refrigerant undergo active phase changes. Energy is used to transfer heat against the temperature gradient from a low-temperature medium to a higher-temperature one. It powers everyday household refrigerators, commercial air conditioning systems, and large industrial chillers.

What we know

• The vapor-compression refrigeration system involves a refrigerant undergoing phase changes as part of a refrigeration cycle. [2]
• It is the most widely used method for the air conditioning of buildings and automobiles, and is also applied in domestic and commercial refrigerators. [2]
• Refrigeration transfers thermal energy against the temperature gradient by using a working fluid that absorbs heat from a low-temperature medium and releases it to a higher-temperature medium. [5]
• Vapor compression chillers may utilize a number of different types of compressors, such as hermetic scroll, semi-hermetic screw, or centrifugal compressors. [4]

Where to go next

• the bigger pictureHow does a mechanical heat pump work?
• a case in pointWhat is an industrial chiller machine?
• whenHow did early refrigeration rely on ice trade?
• how it workedWhy are cascade refrigeration systems used?
• what followedHow did mechanical cooling enable modern cities?
• an unexpected connectionHow did artificial cooling shape the growth of desert cities?Refrigeration enabled the rise of major modern cities in inhospitable hot climates such as Houston and Las Vegas by making life and food preservation viable.

Sources

• [1]vapor-compression refrigeration (Wikidata Q615475) · CC0 1.0
• [2]Vapor-compression refrigeration · CC BY-SA 4.0
• [3]Heat pump and refrigeration cycle · CC BY-SA 4.0
• [4]Chiller · CC BY-SA 4.0
• [5]Refrigeration · CC BY-SA 4.0