I am studying for the CA Mechanical FE. Tragically, I'm stuck on a Thermo problem. Can anyone help? I've attached my work up to the point where I'm stuck, and the problem statement is below. My situation is that I have no info for the final state except the relative humidity, and know of no way to resolve the unknowns so that I can solve for omega2 which will lead to the part a) answer. For the unknowns see my last line equation, all subscripts containing '2'. Also, h sub f, which is the enthalpy of the moisture coming off of the clothes is unknown, as well as T sub f, which is temperature thereof. Any tips would be greatly appreciated. Thanks!
THE PROBLEM:
Air enters a drier at 120℉, 14.7 psia, and 10% relative humidity. It leaves the drier at 14.7 psia and a relative humidity of 90%. For an airflow rate of 5000 lbm/hr, determine a) The amount of moisture picked up by the air in lbm/hr. b) The dry bulb temperature of the air at drier outlet.
THE PROBLEM:
Air enters a drier at 120℉, 14.7 psia, and 10% relative humidity. It leaves the drier at 14.7 psia and a relative humidity of 90%. For an airflow rate of 5000 lbm/hr, determine a) The amount of moisture picked up by the air in lbm/hr. b) The dry bulb temperature of the air at drier outlet.