| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
In order to decrease the thermal conductivity of wood shavings mats, a simple way of adding carbon black (CB) to wood shavings was investigated by the use of four kinds of CBs as a function of additive rate from 0 to 12%. The results showed that CB addition with a rate of only 0.25% reduced the mat thermal conductivity by 14 %. Also, the mechanisms behind the reduction of thermal conductivity were discussed from aspects of the mode of heat transfer in the mat. Three types of mode, namely, conduction through an individual wood shaving, conduction at connecting points between wood shavings, and convective and radiant heat transfer in the space surrounded by wood shavings (coarse pores). Calculation of apparent thermal conductivity of coarse pores revealed that the addition of CB significantly reduced the heat transfer in coarse pores, which suggests that a new wood shaving's surface developed by CB addition reduces both a degree of convection and a radiation factor.
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