Ichihara T.,Kochi Prefectural Forest Technology Center |
Takano S.,Chuuounishi Forestry Office |
Yamasaki T.,Kochi Prefectural Forest Technology Center |
Masaoka H.,Kochi Prefectural Forest Technology Center |
And 6 more authors.
Nihon Ringakkai Shi/Journal of the Japanese Forestry Society | Year: 2010
It is necessary to dry woody biomass used for fuel of boil-ers. We examined the decreasing rate of moisture contents by transpirational drying of Japanese cedar logs with bark. Two meter long logs of Japanese Cedar were stacked up into triangle or quadrilateral on paved collecting place and dried from December to September. As a result, the moisture content decreased from about 140% to 40% through drying for 9 months. There was no difference in drying rate between the triangle and quadrilateral stack. The surface logs dried twice as fast as inside ones regardless of ways of piling logs. The moisture differences inside logs were higher in the inner logs of piles than the surface ones. Besides, bias of moisture content occurred because of the environment of stacking logs. It is necessary to interchange surface logs with inner ones, when surface log's average drying speed declines.