Here is a collection of published papers by some of the greatest minds in the powder coating industry arranged by subject matter. Registration and log in are required to access them. You can learn more about that here.
Ovens
 Fundamentals of cure oven design
              Heat Ex-changer sizing
              Flue gas re circulation
              Flame detection Technology and application
              Heating with gas
Systems
 New versus Used Equipment
              Sizing Your System
              Design & Installation Perimeters
Powder Booths
 Airflow direction
              Automatic gun positioning & motion
              How many guns do I need
              Spray to waste or reclaim