Abstract
In recent years, much attention has been focused on the energy utilization of woody biomass to reduce the emission of greenhouse gas. When the woody biomass is utilized, it is necessary to examine the energy consumption for collection of resources, pretreatment, transportation and after-treatment. The pretreatment of pulverized wood fuel is consisted of three procedures; drying, semi-carbonization and fine comminution. The purpose of the study is to investigate the comminution characteristic of the Japanese cedar thinning and the reduction in energy consumption for pretreatment process and transportation of pulverized wood fuel. Analysis of energy consumption for the pretreatment process and transportation is conducted by using the present empirical equations of work index. From the result of analysis, it is found that the semi-carbonization at a temperature of 250 degree C is effective to the reduction in total energy consumption, when the pulverized wood fuel of 2000 microns or less in particle size is utilized.
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