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Table of Contents 1 2 3 Executive Summary ............................................................................................................ i Introduction ........................................................................................................................ 1 2.1 Applied drying – Experimental drying trials.............................................................. 2 2.2 Applied trials - Economic model ............................................................................... 2 2.3 Drying modelling - Measurement of kiln conditions and wood drying properties .... 2 2.4 Drying modelling - Measurement of essential wood properties ................................ 3 2.5 Drying modelling - Vacuum drying modelling.......................................................... 3 Methodology ...................................................................................................................... 4 3.1 Applied drying – Experimental drying trials.............................................................. 4 3.1.1 Sourcing material and preparation ..................................................................... 4 3.1.2 Drying properties and quality............................................................................. 5 3.1.3 Kiln drying ......................................................................................................... 9 3.1.4 Explanation of statistical analysis and presentation techniques ....................... 12 3.2 Applied drying - Economic model ........................................................................... 13 3.2.1 How to use the model....................................................................................... 13 3.2.2 Inputs ................................................................................................................ 13 3.2.3 Calculated outputs ............................................................................................ 14 3.2.4 Case studies ...................................................................................................... 17 3.3 Drying modelling - Measurement of kiln conditions and wood drying properties .. 20 3.3.1 Shrinkage and flying wood .............................................................................. 20 3.3.2 Load/moisture content...................................................................................... 22 3.3.3 Airflow ............................................................................................................. 23 3.3.4 Board temperature ............................................................................................ 23 3.4 Drying modelling - Measurement of essential wood properties .............................. 24 3.4.1 Wood density and initial MC ........................................................................... 24 3.4.2 Fibre porosity ................................................................................................... 24 4 3.5 Drying modelling - Vacuum drying modelling........................................................ 38 3.5.1 Liquid conservation.......................................................................................... 38 3.5.2 Energy conservation ......................................................................................... 38 3.5.3 Air conservation ............................................................................................... 38 3.5.4 Closure conditions ............................................................................................ 39 3.5.5 Boundary Conditions........................................................................................ 39 3.5.6 Numerical Solution Procedure ......................................................................... 40 3.5.7 Physical Properties ........................................................................................... 40 Results .............................................................................................................................. 46 4.1 Applied drying – Experimental drying trials............................................................ 46 4.1.1 Corymbia citriodora – spotted gum ................................................................. 46 4.1.2 Eucalyptus marginata - jarrah .......................................................................... 57 4.1.3 Eucalyptus pilularis – blackbutt....................................................................... 68 4.1.4 Eucalyptus obliqua - messmate........................................................................ 80 4.2 Applied drying - Economic model ........................................................................... 93 4.3 Drying modelling - Measurement of kiln conditions and wood drying properties .. 95 4.3.1 Shrinkage and flying wood .............................................................................. 95 4.3.2 Load/moisture content...................................................................................... 95 4.3.3 Airflow ............................................................................................................. 96 4.3.4 Board temperature ............................................................................................ 97 4.4 Drying modelling - Measurement of essential wood properties .............................. 98 3.4.3 3.4.4 3.4.5 Gas permeability .............................................................................................. 28 Bound Water Diffusion (Db) ............................................................................ 31 Shrinkage.......................................................................................................... 33PDF Image | Evaluation of super-heated steam vacuum drying
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