ASHRAE Terminology

A Comprehensive Glossary of Terms for the Built Environment
ashrae.org/ashraeterms

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cold box

The thermally insulated section of a cryogenic plant that contains the components operating at low temperatures (heat exchangers, distillation columns, pipes, etc.).

cryocooling (cryogenic cooling)

cooling below –244°F (–153°C, 120 K).

cryogenic liquid

liquefied gas below –244°F (–153°C, 120°K).

cryogenics

science that deals with the production of very low temperatures and their effect on the properties of matter.

cryostat

batch operating apparatus in which a cryogenic liquid or solid evaporates to maintain a cryotemperature, which need not be constant but may vary in a predetermined fashion.

cryotemperature (cryogenic temperature)

temperature within a few degrees of absolute zero (2.2 K).