Introduction to refrigeration 

Refrigeration is defined as the process of extracting heat from a lower temperature heat source , substance or cooling medium and transferring it to a higher temperature heat sink . A refrigeration system is a combination of components and equipment connected in a sequential order to produce the refrigeration effect .

Refrigeration may also be defined as the process of achieving and maintaining a temperature below that of the surrounding the aim being to cool some product or space to the required temperature .

Application of refrigeration 

Food processing , 

chemical and process industries 
comfort air-conditioning 


The standard unit of refrigeration is ton of refrigeration or simply ton denoted by TR . It is defined as the amount of refrigeration effect produced by the uniform melting of one tonne (1000 kg) of ice from and at 0°C in 24 hours .


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