What is sub cooling in HVAC?

The most basic meaning of subcooling is any temperatures below the saturation temperature. Generally, the lowest temperature a condenser can achieve, the better. In other words, the colder the refrigerant is as it flows into the evaporator coil, the more heat it will be able to absorb.

What does superheat mean in refrigeration?

Superheat is measured as the difference between the actual temperature of refrigerant vapor at a certain point and the saturation temperature of the refrigerant.

What is sub cooling effect?

ii) Effect of sub-cooling: sub-cooling is the process of cooling the liquid refrigerant below the condensing temperature for a given pressure. In figure the process of sub-cooling is shown by 2′-3′. As is evident from the figure the effect of sub-cooling is to increase the refrigerating effect.

How is superheat calculated in HVAC?

The total superheat calculation is as follows: Degrees compressor in temperature (50 degrees) minus saturation temperature (23 degrees) equals total superheat (27 degrees).

What is the degree of sub cooling?

Subcooling is any temperature of a liquid or solid below its saturation temperature. Let’s use water as an example again. Water at 211 degrees has been subcooled by 1 degree F. If the temperature of the water is decreased to 180 degrees, the water has been subcooled from 212 to 180 degrees.

What is the effect of superheating the refrigerant?

Effect Of Superheating Though the effect of refrigeration is increased by superheating, the density of vapor which quits the evaporator and enters the compressor is reduced. Consequently, the quantity of vapor which enters the compressor is decreased by superheating.

How is superheat measured in HVAC?

Measure the suction line temperature and suction pressure at the suction side service valve. Ensure the temperature probe is insulated from any external influences. Convert the gauge pressure to saturation temperature and subtract this temperature from the suction line temperature. This is the total superheat.

How is subcooling measured in HVAC?

If we measure the temperature on the liquid line exiting the condenser coil then we know the end temperature after the refrigerant has lowered in temperature. Subtract the lower temperature measured on the liquid line from the saturated temperature and you have subcooling!