Correction factors, as aids to the layout design of adsorption dryers, are to be used in only as a rough estimate of dryer size. If the determination of dryer size is based solely on correction factors as far as its basic parameters are concerned, a reliable evaluation close to limiting values is not possible. The correction factors refer to pressure dewpoints of Pdp -40°C. Factors from Diagram 7.2.2.1 are not obtained from a specific product but based on physical and generally valid laws.
Diagram 7.2.2.1
These factors clearly show how different parameters at the dryer inlet cause differences in dryer performance. Thus dryer capacity with an inlet temperature of ti = 40°C and operating pressure po = 7 bar absolute, is reduced to about 77%, corresponding to the factor 1.29 obtained from the diagram. Looked at another way, i.e. assuming unaltered capacity, the dryer has to be larger by a factor of at least 1.29.
