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Rotary heat exchanger

General heat exchanger : plate exchanger
General heat exchanger
  • Heat and moisture exchange in a plate
  • Apply materials that allows the moisture to pass,
    but not as much gas - a high compression paper
  • Although the thermal conductivity of the material is low,
    the thickness is less than 0.1 mm, so the heat transfer resistance is negligible
  • On the other hand, since the water molecules must pass through the material, the mass transfer resistance is much larger than the heat transfer resistance
  • Latent heat transfer is less efficient than sensible heat transfer
  • The temperature effectiveness of the heat recovery ventilation system using the plate heat exchanger is 60 ~ 80%, while the humidity effectiveness is only 20 ~ 30%
    (Hwataik Han, Youn-bok Choo, 2008, A Study on Heat Transfer Characteristics and Uncertainty of Heat Recovery Ventilator for Various Outdoor Temperature/Humidity Conditions, Korea Journal of Air-Conditioning and Refrigeration Engineering, Vol.20, pp. 608-613)
  • When there is a lot of humidity difference between indoor and outdoor atmosphere, issued that occur are excess condensation in the heat exchanger, deterioration of performance due to corrosion ordeformation, mold generation, and more.
Problem case
Problem case
Rotary heat exchanger
Rotary heat exchanger
  • Heat and moisture transfer by the rotation of the Heat Exchanger
  • Apply materials that can keep heat and moisture
  • After storing the heat in the medium in the hot air section,
    the heat is released in the cold air compartment
  • After the moisture is stored in the medium at the high humidity side, moisture is then released in the low humidity side
  • Because heat and moisture transfer principle are the same, the transfer effectivenesses of sensible heat and latent heat arealso the same
  • The exchange medium is a honeycomb structure coated with desiccant
    on the surface
  • The leak rate of the rotary heat exchanger of which the rotating part sealing is appropriately applied is less than 5%
  • No condensation problems in principle
  • No mold development due to the antibacterial/antifungal properties
    of the Humaster polymer dehumidifier
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