Refrigeration and Air Conditioning:

For particular applications, efficiencies of both living & non-living beings based to a big extent on the physical environment. The nature has conditions in the physical environment in the dynamic condition ranging from one extreme to the other. Humidity, temperature, pressure and air motion are some important environment variables that at any location keep changing during the year. Adaptation to these several a times unpredictable variations are not probable and therefore working efficiently is not possible either for the living beings or the non-living ones. Therefore for any particular purpose, control of the environment is compulsory. Refrigeration & air-conditioning is the subject that deals with the techniques to control the environments of the living & non-living subjects and therefore provide them comforts to enable them to do better and have longer lives.

Objectives:

After learning this unit, you must be able to

•  know what is refrigeration & air-conditioning,
•  know the history of refrigeration,
•  know applications of refrigeration & air-conditioning, and
•  Defined the term ton of refrigeration & COP.