Rotary Dryer - posted in Student: Hi all, I just wanted to ask for help regarding rotary dryer design. I am having confusion on the application of Fourier's Law on insulation for rotary dryers. The "Q" in the equation - is it the heat loss (due to some inefficiencies)? or is it the heat "Q" brought by heating air (heat to be transferred to solids)? I am just confused as when I …