SUBCOOLING

Subcooling
Let us now consider a single component refrigerant at a fixed pressure in a liquid state.
If we pass the liquid through a cooler its temperature will fall. The difference in temperature between the saturation temperature and the measured temperature is called the subcooling effect which is expressed in temperature units°C or °F. As an example of this let us consider water from the cold tap. The temperature of this water is usually about 5°C. The normal boiling point or saturation point of water at atmospheric pressure is 100°C so our tap water is said to be subcooled by 95°C. Hot water will still be subcooled by whatever the difference between is temperature and the boiling point is.
Subcooling is important in the expansion and evaporating parts of the refrigeration cycle.
Two phase