Engineering Tutorials

Rating of Refrigeration Machine

The practical of refrigeration is expressed in terms of ‘tonne of refrigeration’ (briefly written as TR). A tonne of refrigeration is defined as the amount of refrigeration effect produced by the uniform melting of one tonne (l000 kg) of ice from and, at 0°C in 24 hours.

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Introduction to Refrigeration

In air refrigeration, the air is used as a refrigerant. In olden days, air was widely used in commercial applications because of its availability at free of cost. Since air does not change its phase i.e. remains gaseous throughout the cycle, therefore the heat carrying capacity per kg of air is very small as compared to vapour absorbing systems.

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