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Optimization of energy consumption and costs of wood drying with use of different drying techniques
Gorišek, Željko (Author), Straže, Aleš (Author)

URLURL - Presentation file, Visit http://eprints.gozdis.si/148/1/zbgl%2D92%2D6.pdf This link opens in a new window

Abstract
The time and energy required for wood drying and therefore drying costs are among the highest in wood products manufacturing. Analysis of the drying process costs is very complex and needs to evaluate the cost of investments, energy, labour as well as defects of lumber or added value. In the present research work, we upgraded the computer aided engineering (CAE) model of wood drying processes with the economic evaluation of different drying techniques. By analyzing and comparing the costs of different drying processes, the model is able to predict the transition wood moisture content (MCt) at which the alteration from one to another drying technique would get the best results. The model was verified on data from several air- and kiln-drying experiments on 38 mm thick beech wood (Fagus sylvatica L.) boards. Computer simulation predicted advantages of combined dying beech wood with air predrying and continued and finished with kiln drying. The MCt in the winter period was at about 40% MC and decreased to 23% in favourable climate conditions in spring and summer months. The model can be also used for optimising the combination of other drying techniques.

Language:English
Keywords:komorsko sušenje lesa, sušenje na prostem, bukev, poraba energije, stroški sušenja
Work type:Scientific work (r2)
Tipology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Year:2010
Number of pages:str. 57-66
Numbering:Št. 92
UDC:630*84
ISSN on article:0351-3114
COBISS.SI-ID:3048358 Link is opened in a new window
Views:717
Downloads:121
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Record is a part of a journal

Title:Zbornik gozdarstva in lesarstva
Shortened title:Zb. gozd. lesar.
Publisher:Gozdarski inštitut Slovenije, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
ISSN:0351-3114
COBISS.SI-ID:6206978 This link opens in a new window

Secondary language

Language:Unknown
Abstract:
Dolgotrajnost in energijska potratnost sušenja lesa povečuje tudi stroške, ki so med največjimi med lesnopredelovalnimi postopki. Analiza stroškov zahteva vsestransko obravnavo z vrednotenjem stroškov investicije, energije in dela kot tudi upoštevanje razvrednotenja zaradi napak ali dodane vrednosti kakovostnega osušenega lesa. V raziskavi smo nadgradili računalniški model sušilnega procesa z ekonomskim vrednotenjem različnih sušilnih tehnik. S primerjavo stroškov različnih sušilnih postopkov smo predpostaviti prehodno vlažnost lesa, pri kateri bi s kombinacijo več načinov sušenja dosegli najboljše ekonomske rezultate. Metoda je bila preverjena na sušenju bukovine debeline 38 mm s kombinacijo sušenja na prostem in komorskega sušenja. V zimskih mesecih je sušenje na prostem smotrno do vlažnosti 40 %, v najugodnejših klimatskih razmerah pa je optimalna vlažnost prehoda iz sušenja na prostem v komorsko sušenje 23 %. Predstavljeno metodo je mogoče uporabiti tudi za optimizacijo različnih tehničnih postopkov sušenja lesa.


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