QUESTION $1[18]$

A certain material dried in an industrial dryer. The dryer operates at steady state, atmospheric

air at $36C,1$ bar and $60\%$ relative humidity. The air is first heated to $135C$ at constant

pressure. Thereafter the heated air passes over the materials, and $0\mathrm{.}26k\frac{g}{s}$ of moisture is

removed from the materials. The air then exits the drier at $62C,1$ bar and $32\%$ relative

humidity. Determine the following:

$1\mathrm{.}1$ Draw a schematic diagram of the problem

$1\mathrm{.}2$ The required mass flow rate of dry air, in $k\frac{g}{s}$

$1\mathrm{.}3$ The rate of heat transfer to the as it passes through the heating section, in $k\frac{J}{s}.$

Neglect kinetic and potential energy effects