The low exhaust temperature of a refrigerated dryer is due to the cooling process that occurs within the dryer. Refrigerated dryers work by cooling compressed air to a temperature below its dew point, which causes the moisture in the air to condense into liquid form. This moisture is then removed from the compressed air, resulting in dry air that can be used in various industrial applications.

During the cooling process, heat is removed from the compressed air, which causes the exhaust temperature to decrease. This is because the refrigeration system within the dryer is designed to absorb heat from the compressed air and transfer it to the coolant, which is then expelled from the dryer. As a result, the exhaust temperature is typically much lower than the inlet temperature of the compressed air.

The low exhaust temperature is an important aspect of the refrigerated dryer's performance, as it indicates that the dryer is effectively removing moisture from the compressed air. It also helps to protect downstream equipment from the negative effects of moisture, such as corrosion, rust, and contamination.