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PREDICTION OF CONDENSATION AND FROSTING LIMITS IN ROTARY WHEELS FOR HEAT RECOVERY IN BUILDINGS.

Author(s) : HOLMBERG R. B.

Summary

ROTARY HEAT EXCHANGERS IN AIR HANDLING SYSTEMS, PARTICULARLY THOSE WITH HYGROSCOPIC ROTORS, CAN BE OPERATED AT ESSENTIAL LOWER OUTDOOR TEMPERATURE THAN STATIC HEAT EXCHANGERS WITHOUT ANY NEED FOR DEFROSTING. THE REASON FOR ROTARY HEAT EXCHANGERS STARTING TO FROST AT LOWER OUTDOOR TEMPERATURES THAN STATIC HEAT EXCHANGERS IS PROVED TO BE THE MOISTURE TRANSFER IN THE ROTOR. THE SUPPLY AIR TEMPERATURE LIMIT PRESENTED HERE FOR FROSTING AS WELL AS EXCESS WATER IS CALCULATED BY A NUMERICAL METHOD. THE FROSTING-DEFROSTING PROCESS IS ALSO DISCUSSED.

Details

  • Original title: PREDICTION OF CONDENSATION AND FROSTING LIMITS IN ROTARY WHEELS FOR HEAT RECOVERY IN BUILDINGS.
  • Record ID : 1990-1051
  • Languages: English
  • Publication date: 1989
  • Source: Source: ASHRAE Trans.
    vol. 95; n. 1; 64-69; 9 fig.; 4 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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