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Table 17. C. citriodora results summary Species Trial ID. Drying method C. citriodora 1 (SPG1) Days drying [% of conventional kiln drying time ] Initial basic density (kg/m3) [stdev.] Initial MC (%) [stdev.] Final MC (%) average [stdev.] {grade}* 10.7 [1.4] {B} 13.6 [1.0] {C} <0.0001 8.8 [0.7] {B} 9.5 [0.7] {B} <0.0001 9.5 [0.9] {B} 7.9 [0.7] {C} <0.0001 10.2 [0.8] {B} 10.2 [0.7] {B} 0.056 Final MC % select grade (%)** 90 66 36 84 70 9 96 95 MC gradient (%) [stdev.] {grade}* 1.0 [0.6] {A} 1.3 [0.5] {A} <0.0001 0.7 [0.8] {A} 1.0 [0.5] {A} <0.0001 1.4 [0.9] {B} 0.6 [0.7] {A} <0.0001 0.7 [0.7] {B} -1.5 [0.8] {B} <0.0001 Drying stress grade quality [stdev.] {grade}* 0.9 [0.2] {B} 0.6 [0.2] {B} <0.0001 0.7 [0.3] {B} 1.4 [0.3] {C} <0.0001 <0.0001 0.5 [0.4] {B} 1.3 [0.4] {C} <0.0001 Distortion % in grade** [major type] 99 [twist] 98 [twist] 94 [twist] 93 [twist] 98 [twist] 96 [twist] 83 [twist] Collapse (% affected) 0 0 0 0 0 0 0 0 Surface check % select** [%check free] 99 [93] 89 [84] 0.56 100 [96] 8 [3] <0.0001 92 [85] 93 [83] 0.571 93 [86] 87 [72] 0.019 Internal check % check free 100 100 100 100 100 100} 100 100 End split grade* A A 0.063 A A <0.0001 A B 0.053 A B 0.014 14.0 17.2 12.0 13.8 [66] 21 [82] 159 [57] 21 [66] 21 vacuum conventional (kiln) significance (p) 5 (SPG2) vacuum conventional (air) significance (p) 9 (SPG3) vacuum conventional (kiln) significance (p) 13 (SPG4) vacuum conventional (kiln) significance (p) * AS/NZS 4787:2001 Timber-Assessment of drying quality. ** AS 2796: 1999 Hardwood-Sawn and milled products. 887.4 [34.4] 891.7 [44.3] 904.8 [42.2] 852.2 [53.3] 37.9 [3.8] 34.8 [5.5] 32.3 [4.8] 37.3 [5.0] 1.5 [0.4] {C} 1.6 [0.3] {C} 86 [twist] Evaluation of super–heated steam vacuum drying viability and development of a predictive drying model for Australian hardwood species – Final report 56PDF Image | Evaluation of super-heated steam vacuum drying
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