New definitions for refrigeration keywords

April 24, 2019
ASHRAE and the International Institute of Refrigeration (IIR) announced the establishment of new definitions for five refrigeration keywords. The keywords are cooling, refrigeration, chilling, freezing and cold chain.
The definitions are the result of more than a year of discussions and were established to clarify the meaning of basic terminology used in the HVAC&R industry.
“The new definitions will help those within our industry, as well as the general public, gain a clearer understanding of important refrigeration keywords that are often misused or too broadly defined,” said 2018-2019 ASHRAE president Sheila J. Hayter, P.E. “We appreciate the contributions of IIR and anticipate that the adoption of these definitions will be positive.”
IIR has called on all national and regional organizations and associations to adopt and disseminate the new definitions. The definitions will be included in ASHRAE Terminology, its free comprehensive online glossary of more than 3,700 terms and definitions related to the built environment, with a focus on heating, ventilating, air conditioning, and refrigeration (HVAC&R), as well as building envelope, electrical, lighting, water and energy use, and measurement terms.
To avoid confusion, the official definitions are:
Cooling
(1) Removal of heat, usually resulting in a lower temperature and/or phase change
(2) Lowering temperature
Refrigeration
(1) Cooling of a space, substance or system to lower and/or maintain its temperature below the ambient one (removed heat is rejected at a higher temperature)
(2) Artificial cooling
Chilling
Cooling of a substance without freezing it
Freezing
Solidification phase change of a liquid or the liquid content of a substance, usually due to cooling
Cold Chain
Series of actions and equipment applied to maintain a product within a specified low-temperature range from harvest/production to consumption
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