Dehumidification of air (Fig. 19.4-1) for the system of Example 19.4-1 let the vapor is H 2

Question:

Dehumidification of air (Fig. 19.4-1) for the system of Example 19.4-1 let the vapor is H₂0 and the stagnant gas is air. Assume the following conditions (which are representative in air conditioning): (i) at z = δ, T = 80°F and x_H2O = 0.018; (ii) at z = 0, T = 50°F.

(a) For p = 1atm, calculate the right side of Eq. 19.4-9.

(b) Compare the conductive and diffusive heat flux at z = 0. What is the physical significance of your answer?