The paper presents experimental results of jet drying tests of birch (Betula pendula) and spruce (Picea abies) veneers at temperatures of 140°C and 190°C. Results include drying rates for 1.5 mm thick birch veneers as well as 1.5 mm and 2.6 mm thick spruce veneers of both heartwood and sapwood. Based on the test results, material parameter values for a simplified drying model are assessed. The model is based on the use of an effective diffusion coefficient and an effective surface emission coefficient, which values are calibrated to fit to the experimental results. It is observed, that separate model parameter sets are needed for the two different species but also for occurrence of heartwood or sapwood (spruce) and different thickness values of veneers.
- jet drying
Hanhijärvi, A., Hukka, A., Paajanen, T., Pulkkinen, P., & Sundman, S. (2003). Experimental investigation of jet drying of birch and spruce veneers and modelling with a simplified approach. Holz als Roh- und Werkstoff, 61(2), 83-88. https://doi.org/10.1007/s00107-003-0379-4