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An ultra low temperature (ULT) freezer is a refrigerator that stores contents at −80 to −86 °C (−112 to −123 °F). [1] An ultra low temperature freezer is commonly referred to as a "minus 80 freezer" or a "negative 80 freezer", referring to the most common temperature standard. [2] ULT freezers come in upright and chest freezer formats.
Home freezers as separate compartments (larger than necessary just for ice cubes) were introduced in 1940. Frozen foods, previously a luxury item, became commonplace. Freezer units are used in households as well as in industry and commerce. Commercial refrigerator and freezer units were in use for almost 40 years prior to the common home models.
The company claims to have innovated the refrigerator light, the upright freezer, and the "Air Sweep" mechanism for distributing conditioned air. In 1956, Hupp Corporation acquired Gibson. [ 2 ] In 1967 Hupp merged with White Consolidated Industries (WCI), which created the White-Westinghouse brand in 1975. [ 3 ]
Polar is a research refrigerator designed and developed by University of Alabama at Birmingham (UAB) Center for Biophysical Sciences and Engineering (CBSE) for NASA Cold Stowage.
Deep or Big Freeze, a purported cooling effect of the expanding universe; Deep Freeze Range, a mountain range in Antarctica; Deep freezer, a stand-alone freezer unit for preserving food; Operation Deep Freeze, a series of American expeditions to Antarctica beginning in 1955; Deep Freeze, a kernel-level software utility by Faronics
A low T m can only be reached if T i is low. In dilution refrigerators, T i is reduced by using heat exchangers as shown in the schematic diagram of the low-temperature region above. However, at very low temperatures this becomes more and more difficult due to the so-called Kapitza resistance. This is a heat resistance at the surface between ...