the provision of refrigeration to various users. A distinction is made between centralized and decentralized refrigeration supply.
In centralized refrigeration supply, a common refrigerating system or refrigeration plant provides refrigeration to many objects either indirectly or directly. The indirect method entails the use of a secondary refrigerant; in the direct method, cooling is obtained by boiling a refrigerant in an evaporator at low temperatures. Examples of centralized refrigeration supply include the refrigeration supply systems of cold-storage facilities with many deep-freeze and storage compartments, of refrigerator trains in which one of the cars contains an indirect refrigerating system, and of chemical production facilities served by a common refrigeration plant.
In decentralized refrigeration supply, each object is cooled by a separate refrigerating machine. The objects to be cooled may be domestic refrigerators, laboratory freezers, commercial refrigeration equipment (for example, refrigerated cases, refrigerated cabinets, refrigerated counters, or walk-in storage coolers), or air-conditioning units; they may also be larger objects, such as freezing chambers, quick-freezing units with separate refrigerating machines, or refrigerators with separate machines for the storage compartments. For decentralized refrigeration supply, direct refrigerating systems are used more often than indirect systems.
REFERENCEKholodil’naia tekhnika: Entsiklopedicheskii spravochnik, vol. 3. [Moscow] 1962.
V. L. TSIRLIN