The contact factor for dryer performance and design
Abstract
We describe an approach using the contact factor (CF) as the dryer performance and design parameter. The CF is calculated using known drying variables with a view to minimizing the drying costs. An algorithm to obtain the ‘economic’ CF for drying is presented. Besides being a design parameter of single-stage dryers, the CF is a useful parameter in determining the schedule of cascade dryers in multi-stage drying. We demonstrate the dryer component selection process using a set of design charts for heat pump dryers. Copyright © 1999 John Wiley & Sons, Ltd.