I have a copy of the dissertation listed below, just need to take the time to read it.
An analysis of the effects resulting from design changes in two solar wood drying kiln systems in northwest Arkansas by Harper, Tanny Smith, EdD UNIVERSITY OF ARKANSAS, 1997, 85 pages UMI #9820795
If anyone else is interested it is available from UMI, for a fee by calling 800-521-3042. If you are associated with a university check and see if they subscribe to ProQuest Digital Dissertations and you might be able to download a copy for free.