A New Development for Total Heat Recovery Wheels

Total energy exchangers with a rotating heat storing matrix have been applied to air conditioning systems for more than 25 years with very good results for saving both heating and cooling energy. The efficiency of the hygroscopic coating of the rotors is very important to recover the latent energy, but there is the risk of cross contamination. To prevent odour transfer, the mechanism of the sorption and desorption process has to be investigated in detail. Selecting the adsorbant accordingly, the rotating heat exchanger can meet the new ventilation requirements in buildings for a high indoor air quality.