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Law of Thermodynamics

For Learning refrigeration we need to have a basic understanding of the laws of thermodynamics.  We should know the basics idea of how energy works. 

Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the universe remains constant, merely changing from one form to another.

The first Law of thermodynamics

The First Law of Thermodynamics states that energy is always conserved, it cannot be created or destroyed. In essence, energy can only be converted from one form into another.

The Second Laws Of thermodynamics

According to the Second Law of Thermodynamics when there is a transfer of energy from one form to another, useful energy is lost.  This applies heavily to refrigeration and when this happens it is referred to as latent heat energy being dispelled or absorbed. This happens when liquid boils to vapour or the opposite when gas condeses back to liquid.