What is the purpose of a subcooler in a vapor-cycle cooling system?

A subcooler in a vapor-cycle cooling system is specifically designed to further cool the refrigerant after it has been condensed but before it enters the evaporator. By cooling the refrigerant to a temperature lower than its condensation point, the subcooler ensures that any remaining liquid refrigerant is not vaporized prematurely. This helps to maximize the cooling efficiency of the system because it allows for better heat exchange in the evaporator.

As the refrigerant is cooled in the subcooler, it remains in liquid form, which is essential for the proper functioning of the evaporator. Maintaining the refrigerant in a subcooled state prevents any unwanted vaporization before the refrigerant reaches the evaporator, ensuring that the cooling cycle performs optimally. This process contributes to enhancing the overall efficiency and effectiveness of the cooling system.