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Titolo:
Improving MDF fibre drying operation by application of a mathematical model
Autore:
Pang, S;
Indirizzi:
Forest Res, Rotorua, New Zealand Forest Res Rotorua New ZealandForest Res, Rotorua, New Zealand Hebei Univ Technol, Coll Chem Engn, Dept Proc Equipment & Control Engn, Tianjin, Peoples R China Hebei Univ Technol Tianjin Peoples R China gn, Tianjin, Peoples R China
Titolo Testata:
DRYING TECHNOLOGY
fascicolo: 8, volume: 19, anno: 2001,
pagine: 1789 - 1805
SICI:
0737-3937(2001)19:8<1789:IMFDOB>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Keywords:
medium density fibreboard (MDF); fibre drying; mathematical modelling; moisture content; exhaust air; environmental impact;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Pang, S Forest Res, Private bag 3020, Rotorua, New Zealand Forest Res Private bag 3020 Rotorua New Zealand rua, New Zealand
Citazione:
S. Pang, "Improving MDF fibre drying operation by application of a mathematical model", DRY TECHNOL, 19(8), 2001, pp. 1789-1805

Abstract

Fibre drying is an important process in production of medium density fibreboard (MDF) which consumes a large amount of energy, affects product quality and, without appropriate control, causes environmental concerns. Based onfundamental knowledge of wood fibre-water relationships and heat/mass transfer, a mathematical model has been developed to simulate the MDF fibre drying processes. The model is able to predict fibre moisture content, air temperature and air humidity along the dryer length. After validation against the measured air temperature and humidity, the model has been extended to include both fibre drying and fibre conditioning, the latter occurring in the dry fibre conveyers. Due to potential benefits in reducing emissions of volatile organic compounds (VOCs) and in improving panel quality, lower drying temperatures are more desirable than higher temperatures. However, in order to achieve the target moisture content after drying, a higher air velocity is needed or a second-stage dryer is added. The model was employed to determine the air velocity required and to assist in designing a second dryer for further drying and recovery of moist vapour and heat. A further studywas undertaken to investigate fibre drying or fibre conditioning in the fibre conveyers and, once again, the fibre drying model was used to determinethe air conditions.

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Documento generato il 05/12/20 alle ore 03:56:16