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A cascade refrigeration cycle is a multi-stage thermodynamic cycle. An example two-stage process is shown at right. (Bottom on mobile) The cascade cycle is often employed for devices such as ULT freezers. [1] In a cascade refrigeration system, two or more vapor-compression cycles with different refrigerants are used.
ULT freezers that employ the cascade refrigeration (CR) system use up to 20 times the energy footprint of household fridges, and used to refrigerate with greenhouse gas fluids (typically hydrofluorocarbon R-508B). [7] Modern ULT freezers employ HC (i.e., hydrocarbon) gas mixtures: typically, ethane and propane.
The term "Kleemenko cycle" is used in refrigeration if multi-component refrigerants (MCR) are used in a cycle. [ 1 ] The Russian scientist Aleksandr Petrovich Klimenko (Александр Петрович Клименко) described the one-flow cascade cycle in the Proceedings of XIII International Conference of Refrigeration in Copenhagen ...
Eas_hm_cascade.pdf (735 × 483 pixels, file size: 15 KB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Unlike booster systems, economizers achieve subcooling with a single compressor designed for economizing. Cascade subcooling systems offer yet another method, using a separate refrigeration system to subcool the refrigerant. While effective, these systems are costly and complex, requiring dedicated compressors and additional equipment.
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Commercial refrigeration. Refrigeration is any of various types of cooling of a space, substance, or system to lower and/or maintain its temperature below the ambient one (while the removed heat is ejected to a place of higher temperature). [1] [2] Refrigeration is an artificial, or human-made, cooling method. [1] [2]
However, if carbon dioxide is used as a part of a cascade refrigeration system, it can be used at lower pressures. [21] Using carbon dioxide in cascade refrigeration systems also means that the aforementioned benefits of availability and low price are applicable for a cascade system. There are also benefits to the increased required pressures.