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Sorption Models and Creation of Precision Diagrams for the Equilibrium Moisture Content

Authors :
Nencho Deliiski
Source :
Drvna industrija, Volume 62, Issue 4
Publication Year :
2011
Publisher :
Faculty of Forestry and Wood Technology, University of Zagreb, 2011.

Abstract

Precision has been evaluated of the 10 most often used wood sorption models, available in literature, for the calculation of the equilibrium moisture content of wood given a change in temperature within the range from 0 °С to 200 °С and in the relative humidity of the surrounding air environment from 0% to 100%. Based on the results of the critical analysis, an argumentative selection has been done of the models that can be purposefully used for the computer determination of wood equilibrium moisture content in contemporary systems for model-based or model predictive automatic control of different processes of hydrothermal treatment of wood and wood materials. With the help of these models, diagrams have been created for precise determination of wood equilibrium moisture content. The established high precision of both the Simpson and Ray et al. models and the Garsía model, which we have refi ned, makes them user friendly for model-based or predictive automatic systems and other engineering applications in the respective temperature ranges specified in the paper.<br />U radu se ocjenjuje točnost deset u literaturi najčešće primjenjivanih sorpcijskih modela za izračun ravnotežnog sadržaja vode u drvu za raspon temperature od 0 do 200 ºС i relativne vlažnosti okolnog zraka od 0 do 100%. Na temelju kritičke analize napravljena je selekcija modela koji se mogu upotrijebiti za računalno određivanje ravnotežnog sadržaja vode u drvu u sklopu suvremenih sustava za automatsku kontrolu procesa hidrotermičke obrade drva i drvnih materijala. Uz pomoć odabranih modela napravljeni su dijagrami za prezicno određivanje ravnotežnog sadržaja vode u drvu. Dokazana visoka točnost Simpsonova i Rayeva te Garsíjeva modela, uz napravljene dorade modela, čine te modele jednostavnima za primjenu u automatskim sustavima za upravljanje i druge inženjerske primjene u rasponu temperatura specificiranih u radu.

Details

Language :
English
ISSN :
18471153 and 00126772
Volume :
62
Issue :
4
Database :
OpenAIRE
Journal :
Drvna industrija
Accession number :
edsair.od.......951..2474ec6396b55278535897b9dfcfda3b