On the Use of the Parabolic Concentration Profile Assumption for a Rotary Desiccant Dehumidifier

[+] Author and Article Information
E. E. Chant

University of Turabo, Gurabo, PR 00778

S. M. Jeter

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Sol. Energy Eng 117(1), 45-50 (Feb 01, 1995) (6 pages) doi:10.1115/1.2847734 History: Received May 01, 1994; Revised October 01, 1994; Online February 14, 2008


The current work describes a model for a desiccant dehumidifier which uses a parabolic concentration profile assumption to model the diffusion resistance inside the desiccant particle. The relative merits of the parabolic concentration profile model compared widely utilized rotary desiccant wheel models are discussed. The periodic steady-state parabolic concentration profile model developed is efficient and can accommodate a variety of materials. These features make it an excellent tool for design studies requiring repetitive desiccant wheel simulations. A quartic concentration profile assumption was also investigated which yielded a 2.8 percent average improvement in prediction error over the parabolic model.

Copyright © 1995 by The American Society of Mechanical Engineers
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