👉 Refrigeration is a process in which a substance (such as air) is cooled to a lower temperature than its boiling point, typically through the use of an external heat source. This process can be used for various purposes such as preserving food, cooling systems, and energy storage. In the context of refrigeration, it refers specifically to a method by which cold air is confined in a container or enclosed space (such as a refrigerator) to retain its temperature below its boiling point. The goal