PCM COMBINATION

Optimum discharge air temperature without the use of after cooler.

Achieves a super dry dew point, as low as – 100℃.

1. Drastically reduces energy consumption by pre-removing up to 75% of moisture by using the PCM dryer.
2. PCM dryer, cycles (on/off) are controlled automatically according to inlet load: e.g. lunch time, season change.
3. Reduces total energy consumption by operating PCM dryer alone if necessary. (except winter)
4. Reduces energy consumption by controlling the desiccant dryer cycle time according to outlet dew point, which corresponds to inlet moisture load.
5. Integrated high efficiency blower, which regenerates with ambient air. No purge loss.

Phase change in PCM dryer

• When a refrigeration compressor and condenser fan are running, the cold refrigerant in the chiller (evaporator) cools the liquid Phase Change Material(PCM) and it gradually freezes.
• When a PCM is sufficiently cooled and frozen, the refrigeration compressor and condenser fan stop.
• The compressed air is continuously cooled by the PCM while the refrigeration compressor is inactive. No power is consumed during this period.
• The PCM gradually melts as it adsorbs heat from the compressed air, and when fully melted, the refrigeration compressor and condenser fan resume to cool down the PCM.

Dehydration of Compressed Air

• Compressed air saturated with water vapor enters reheater, and is pre-cooled by the outgoing chilled air.
• It is then directed to chiller where it is further cooled by the Phase Change Material (PCM).
• As the air is cooled, water vapor condenses into liquid droplets, which are then removed by high efficiency integral moisture separator with a NO Loss Drain.
• Chilled air enters the heated desiccant tower to dry and supply lower than guaranteed dew point of -40℃ or -70℃.
• Dried air returns to the PCM dryer’s reheater, where it is reheated with very low dew point. This in turn, supplies clean and dry compressed air to point of use.

• Above table shows an energy savings comparison rate between a desiccant and a PCM COMBINATION without changing the dryer type.
• The below example shows the detailed energy cost, when a heater purge dryer is converted into a PCM COMBINATION- blower non-purge.
• AS a result, energy saving are maximized when a desiccant dryer is converted to a PCM COMBINATION along with their types.