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STEADY STATE ONE-DIMENSIONAL WATER VAPOUR MOVEMENT BY DIFFUSION AND CONVECTION IN A MULTILAYERED WALL.

Author(s) : TENWOLDE A.

Summary

CURRENT MOISTURE ANALYSIS METHODS FOR WALLS IGNORE AIR LEAKAGE EFFECTS OR ARE NOT DIRECTLY APPLICABLE TO MULTILAYERED WALLS. MATHEMATICAL EQUATIONS WERE DEVELOPED FOR WATER VAPOUR FLOW, VAPOUR PRESSURES, AND MOISTURE ACCUMULATION UNDER STEADY STATE CONDITIONS WITH HOMOGENEOUS ONE-DIMENSIONAL AIRFLOW THROUGH A MULTILAYERED WALL. WITH THIS METHOD, A BETTER QUALITATIVE UNDERSTANDING MAY BE GAINED OF THE EFFECTS OF AIR LEAKAGE ON MOISTURE ACCUMULATION. SAMPLE ANALYSES SHOW THAT SIGNIFICANT MOISTURE ACCUMULATION SHOULD NOT BE EXPECTED IN NONHYGROSCOPIC CAVITY INSULATION, WITH OR WITHOUT AIR LEAKAGE. THE LOCATION OF CONDENSATION MAY CHANGE WITH CHANGING AIR LEAKAGE RATES.

Details

  • Original title: STEADY STATE ONE-DIMENSIONAL WATER VAPOUR MOVEMENT BY DIFFUSION AND CONVECTION IN A MULTILAYERED WALL.
  • Record ID : 1986-0509
  • Languages: English
  • Publication date: 1985
  • Source: Source: ASHRAE Trans.
    vol. 91; n. 1A; 322-342; 11 fig.; 1 tabl.; 9 ref.; append.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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