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Heat and moisture transport on the building materials

  1. Feb 18, 2012 #1
    I have some questions about heat and moisture transport.
    1. It is known that The water vapor permeability (μ) is a function of relative humidity (φ ) within the cavity of the porous materials:
    μ = B1 + B2 *exp(B3*φ )
    where B1, B2 and B3 are coefficients of the water vapor permeability function based on building material property testing curve fits. I have an important question. Where can I found this coefficients?
    2. Simiraly, The moisture content gamma is a function of relative humidity (φ ) within the cavity of the porous materials:
    Gamma=(A1*phi)/(1+A2*φ)/(1-A3*φ)
    where A1, A2 and A3 are coefficients for the sorption isothermal equilibrium function. Where can I get this coefficients?
    And finally.
    3. Where can I found tables about effective mass transfer coefficient?
     
  2. jcsd
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