A laboratory experiment involves simultaneous heat and mass transfer from a water-soaked towel experiencing irradiation from a
Question:
A laboratory experiment involves simultaneous heat and mass transfer from a water-soaked towel experiencing irradiation from a bank of radiant lamps and parallel flow of air over its surface. Using a convection correlation to be introduced in Chapter 7, the average heat transfer convection coefficient is estimated to be h = 28.7 W/m2 ∙ K. Assume that the Radiative propel1ies of the towel are those of water, for which a = ε= 0.96, and that the surroundings are at 300 K.
(a) Determine the rate at which water evaporates from the towel nA (kg/s).
(b) Perform an energy balance on the towel to determine the net rate of radiation transfer, qrad (W), to the towel. Determine the irradiation G (W/m2).
Step by Step Answer:
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine