DESICCANT UNIT
1. calculate mass flow rate of each tray (ma,tray = ma/n)
2. calculate mass of moisture adsorped by each desiccant tray (mass ratio model)
3. calculate heat transfer rate from adsorption process of each tray (heat transfer model)
4. calculate total mass of moisture adsorped by desiccant tray
5. calculate total heat transfer rate from adsorption process
6. calculate outlet temperature of air
7. calculate outlet moisture content of air