Refrigerant drying means that the compressed air is cooled, which allows a large amount of the water to condense and be separated. After cooling and condensing, the compressed air is reheated to around room temperature so that condensation does not form on the outside of the pipe system. compressed air enters the dryer and passes through an air to air heat exchanger, which precools the incoming air. In the second stage, compressed air passes through an air to refrigerant heat exchanger to reduce the compressed air dewpoint to + 3°C / + 37°F. Water vapor that was in the air condenses into liquid, which is trapped and removed. The dry air is then warmed up in the air to air heat exchanger to reduce the relative humidity in the air to prevent condensate from forming in downstream piping.
