Due to rising energy costs, the recovery of energy from the exhaust air in air conditioning systems is becoming more important. Previously, the recovery of sensible heat was considered adequate. At low humidity ambient air conditions in winter not only specially treated water is required to condition the air, but also the heat of condensation must be supplied.
Example: air conditioning system with 50.000 m³/h incoming & exhaust air
design data, winter conditions:
air mass flow: 60.000 kg/h
required room temperature: 21 °C / 40 % RH
building heat load: 180 kW
building moisture load for approx. 200 persons: 30 kg/h
calculated at an elevation of 400 m above sea level