In a sizing of a spray drying:

i$.$ Estimate the dimensions of a drying chamber for a spray dryer that has an output of $1000k\frac{g}{h}$ of a heat sensitive biological material at $60C$ containing $5\%$ moisture and having a mean particle size of $100$ micrometer. The feed contains $40\%$ solids by weight in an aqueous solution at $4C.$ The inlet air has a humidity of $0\mathrm{.}01k\frac{g}{k}g$ dry air and is at $150C,$ while the outlet air is at $80C.$

$*$Assume the specific heat of the dry solids is $0\mathrm{.}3$kca$\frac{l}{k}g.C$