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Ki-Hoon Shin Cheul-Woo Park Dong-Won Son Nam-Gi LimAbstractCharacteristics of heating and drying of Canadian-imported Douglas-fir timber using microwave in order to secure convenienceand quality of drying timber and to get basic data for secondary conservation treatment are as follows: As the results of analysisof change curves of internal temperature of the timber after irradiating it, round timber and board timber showed stable heat distribution, heat consumption and surface water-content in heating with 30kW for 30 minutes and 120 minutes and with 40kW for 3 minutes and 9 minutes, respectively. Especially, surface water-content distribution according to heating by microwave showed very even leveling and water-content decrease rate was also more 30% compared to its weight showing excellent dry efficiency.And in case of soaking timbers into liquid chemicals for secondary conservation according to the analysis results of heat consumption, it is expected that large amount of preservative will be permeated. Therefore, timber heated by microwave is remarkably available for using industrial materials and developing secondary utilized products with its fast water-content decreaseand dryness and higher heat consumption. Keywords : Microwave, Douglas fir, Heating schedule, Heat distribution, Heat consumption |
