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25 JAR1 JAR2 JAR3 JAR4 Width Thickness Width Thickness Width Thickness Width Thickness 20 15 10 5 0 Figure 27. Scattergram of gross shrinkage – E. marginata Table 30. Gross shrinkage results – E. marginata Gross shrinkage (mm) JAR2 JAR3 Width Thickness Width Thickness 10.2 8.0 16.9 12.8 3.2 3.0 3.1 2.3 < 0.0001 8.5 6.8 15.3 14.3 4.2 2.7 2.5 2.5 < 0.0001 Width Average 11.6 Maximum 19.6 Minimum 5.1 JAR1 Thickness 9.6 20.1 4.2 3.2 Width 7.8 13.1 3.0 2.4 JAR4 Thickness 5.6 14.5 1.3 2.4 Standard deviation Significance (p) 2.8 < 0.0001 < 0.0001 Drying times and vacuum kiln output For each conventional trial the total kiln drying time was 61 days. The total drying times, including equalisation for the vacuum trials JAR1, JAR2 ,JAR3 and JAR4 were 25.6, 19.5, 24.9 and 25.4 days, respectively (Figure 28 to Figure 31). Unfortunately, a PLC circuit board malfunction cut short the JAR4 trial; consequently, we cannot directly compare the results with the other trials. 64 Evaluation of super–heated steam vacuum drying viability and development of a predictive drying model for Australian hardwood species – Final report Shrinkage (%)PDF Image | Evaluation of super-heated steam vacuum drying
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