$(7)$

$12\mathrm{.}49$ Moist air at $33C$ and $60\%$ relative humidity enters a dehu$-$

midifier operating at steady state with a volumetric flow of rate of

$230\frac{m^3}{m}in.$ The moist air passes over a cooling coil and water va$-$

por condenses. Condensate exits the dehumidifier saturated at $12C.$

Saturated moist air exits in a separate stream at the same temperature.

There is no significant loss of energy by heat transfer to the surround$-$

ings and pressure remains constant at $1$ bar. Determine

a$.$ the mass flow rate of the dry air, in $k\frac{g}{m}in.$

b$.$ the rate at which water is condensed, in kg per kg of dry air

flowing through the control volume.

c$.$ the required refrigerating capacity, in tons.