In today’s competitive service market, every conscientious service technician should understand why a refrigeration or air conditioning system must have the proper amount of liquid subcooling. The amount of liquid subcooling not only affects system capacity, but also the effectiveness and capacity of expansion type metering devices.
Subcooling is defined as the difference between the measured liquid temperature and the liquid saturation temperature at a given pressure, or any sensible heat taken away from the 100 percent.