Heat exchanger in this unit will serve as a heat exchange between the air flow through the flow with purification from Spears to release to reduce the temperature of the incoming fresh air.
Heat exchanger in this unit will serve the heat exchange between the air through purification and flow out of the tower to reduce the temperature of the incoming fresh air.
A heat exchanger in this unit will perform heat exchange between the air through the purification with the flow out of the distillation column to reduce the temperature of the fresh air in.