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Implementation of adaptive control systems in industrial dry kilns
Valutec AB, Skellefteå.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Träteknologi.
2003 (engelsk)Inngår i: Proceedings 8th International IUFRO Wood Drying Conference: Improvement and innovation in wood drying : a major issue for a renewable material : 24-29 August 2003, Brasov, Romania / [ed] Mihai Ispas; Sergiu T Chiriacescu, Brasov: Transilvania University of Brasov, Faculty of Wood Industry , 2003, s. 397-400Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Capacity optimisation of Norway spruce, 150x50 mm2 was carried out in a full-scale kiln dryer starting at 50 °C wet bulb temperature. The objective was to reach as high capacity as possible. Maximum allowed moisture content (MC) standard deviation was 10% of the end moisture content value with 2 % maximum allowed amount of checks. An adaptive control strategy for the process control of a kiln dryer was used to optimise the drying process. The temperature drop across the load (TDL) was used to achieve a constant moisture flux from the drying batch. The drying time was 56 h and the total cycle time was 66. 7 h. The end moisture content was 15. 6 % with a standard deviation of 1. 4 %-units. It was concluded that adjustments in TDL due to the amount of heartwood need to be done using this control strategy. Optimising start parameters for different wood species and board dimensions considering maximum allowed checking is important to achieve maximum capacity with this control strategy.

sted, utgiver, år, opplag, sider
Brasov: Transilvania University of Brasov, Faculty of Wood Industry , 2003. s. 397-400
HSV kategori
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Identifikatorer
URN: urn:nbn:se:ltu:diva-34691Lokal ID: 8f594f20-770c-11dc-80da-000ea68e967bOAI: oai:DiVA.org:ltu-34691DiVA, id: diva2:1007942
Konferanse
International IUFRO Wood Drying Conference : 25/08/2003 - 29/08/2003
Merknad
Godkänd; 2003; 20071010 (ysko)Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2017-11-25bibliografisk kontrollert

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