When you want high chill speed, very cold endpoints, smaller footprint,
low capital investment and ease of use, cryogenics can deliver.
While cryogenics may appear to cost more than other cooling methods, the speed of chill, the very cold endpoints that can be attained, the smaller footprint in the plant, the lower capital investment, and the ease of use can make it the most cost effective. The most common cryogenics are liquid nitrogen (LIN) and liquid carbon dioxide (LCO2), and one or the other or both are commonly available throughout most of the United States and Canada. While technically LCO2 is not a cryogen, it is the most common liquefied gas alternative to LIN.
Typically 99.999 percent pure, LIN is produced in an air separation plant that has liquefaction capabilities. Such a facility also will produce liquid oxygen and limited quantities of liquid argon. The major cost components for LIN supply are electrical energy for separation and liquefaction, and trucking the liquid to the customer. The air is free.