In kiln drying of softwood timber, external heat and moisture mass transfercoefficients are important in defining boundary temperature and moisture content at the woodsurface. In addition, superheated steam drying of ...In kiln drying of softwood timber, external heat and moisture mass transfercoefficients are important in defining boundary temperature and moisture content at the woodsurface. In addition, superheated steam drying of wood is a promising technology but this has notbeen widely accepted commercially, partially due to the lack of understanding of the dryingphenomena occurred during drying. In this work, experimental investigation was performed to quantifythe heat transfer between wood surface and surrounding moist air or superheated steam. In theexperiment, saturated radiata pine sapwood samples were dried using dry-bulb/wet-bulb temperaturesof 60℃/50℃, 90℃/60℃, 120℃/70℃, 140℃/90℃, 160℃/90℃, 140℃/100℃ and 160℃/100℃. The lasttwo schedules were for superheated steam drying as the wet-bulb temperature was set at 100℃. Thecirculation velocity over the board surface was controlled at 4.2m·s^(-1). Two additional runs(90℃/60℃) using air velocities of 2.4 m·s^(-1) and 4.8 m·s^(-1) were performed to check theeffect of the circulation velocity. During drying, sample weight and temperatures at wood surfaceand different depths were continuously measured. Prom these measurements, changes in woodtemperature and moisture content were calculated and external heat-transfer coefficient wasdetermined for both the moist air and the superheated steam drying.展开更多
北欧设计师Vincent de Graaf和Wendy SaunderS,带领着他们的AIM恺慕设计团队完成了位于上海浦东陆家嘴SOHO世纪广场的全新办公空间设计。大胆鲜明的风格一直是AIM恺慕团队的标志,这次,他们以"勇敢新世界"为创意点,在办公环境...北欧设计师Vincent de Graaf和Wendy SaunderS,带领着他们的AIM恺慕设计团队完成了位于上海浦东陆家嘴SOHO世纪广场的全新办公空间设计。大胆鲜明的风格一直是AIM恺慕团队的标志,这次,他们以"勇敢新世界"为创意点,在办公环境中展开了富有戏剧性的空间革新,令人大开眼界。这令人惊异的办公环境分为三个部分:大堂及两个风格迥异的样板办公室。大堂是简洁并具有冲击力的,高挑的室内空间令视野变得开阔。展开更多
文摘In kiln drying of softwood timber, external heat and moisture mass transfercoefficients are important in defining boundary temperature and moisture content at the woodsurface. In addition, superheated steam drying of wood is a promising technology but this has notbeen widely accepted commercially, partially due to the lack of understanding of the dryingphenomena occurred during drying. In this work, experimental investigation was performed to quantifythe heat transfer between wood surface and surrounding moist air or superheated steam. In theexperiment, saturated radiata pine sapwood samples were dried using dry-bulb/wet-bulb temperaturesof 60℃/50℃, 90℃/60℃, 120℃/70℃, 140℃/90℃, 160℃/90℃, 140℃/100℃ and 160℃/100℃. The lasttwo schedules were for superheated steam drying as the wet-bulb temperature was set at 100℃. Thecirculation velocity over the board surface was controlled at 4.2m·s^(-1). Two additional runs(90℃/60℃) using air velocities of 2.4 m·s^(-1) and 4.8 m·s^(-1) were performed to check theeffect of the circulation velocity. During drying, sample weight and temperatures at wood surfaceand different depths were continuously measured. Prom these measurements, changes in woodtemperature and moisture content were calculated and external heat-transfer coefficient wasdetermined for both the moist air and the superheated steam drying.
文摘北欧设计师Vincent de Graaf和Wendy SaunderS,带领着他们的AIM恺慕设计团队完成了位于上海浦东陆家嘴SOHO世纪广场的全新办公空间设计。大胆鲜明的风格一直是AIM恺慕团队的标志,这次,他们以"勇敢新世界"为创意点,在办公环境中展开了富有戏剧性的空间革新,令人大开眼界。这令人惊异的办公环境分为三个部分:大堂及两个风格迥异的样板办公室。大堂是简洁并具有冲击力的,高挑的室内空间令视野变得开阔。
