Heat and mass transfer in fry drying of wood

Grenier David, Bohuon Philippe, Méot Jean-Michel, Lecomte D., Baillères Henri. 2007. Heat and mass transfer in fry drying of wood. Drying Technology, 25 (3) : 511-518. IUFRO International Wood Drying Conference. 9, Nanjing, Chine, 21 Août 2005/26 Août 2005.

Résumé : This article describes the coupled heat and mass (water, oil) transport phenomena in parallelepiped samples of beech (Fagus sylvatica) fried in peanut oil between 120 and 180°C. The aim was to evaluate the suitability of simultaneous fry drying and oil impregnation as an alternative wood treatment process. Water loss and oil impregnation were continuously assessed during the process. Temperature and pressure were measured at the center of the sample. The water in the peripheral layers of the wood vaporizes at atmospheric pressure. The water at the center of the wood vaporizes at overpressures of the order of 2.8 × 105 Pa. High fluxes of water were recorded of about 0.006 kg/(m2s). The impregnated oil can amount to 20% of the mass of the removed water.

Mots-clés Agrovoc : séchage, friture, échange thermique, huile, bois, transfert de masse

Classification Agris : K50 - Technologie des produits forestiers
J12 - Manutention, transport, stockage et conservation des produits forestiers

Champ stratégique Cirad : Hors axes (2005-2013)

Auteurs et affiliations

• Grenier David, CTBA (FRA)
• Bohuon Philippe, CIRAD-PERSYST-UMR Qualisud (FRA)
• Méot Jean-Michel, CIRAD-PERSYST-UMR Qualisud (FRA)
• Lecomte D., ENSTIMAC (FRA)
• Baillères Henri, CIRAD-PERSYST-UPR Bois tropicaux (AUS)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/539127/)

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