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7万t/a合成氨蒸汽自给技术评述
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作者 包友兴 《小氮肥》 2004年第6期1-5,共5页
关键词 合成氨 蒸汽自给技术 造气吹风气回收 “全低变”技术 锅炉余热回收 中压过热蒸汽 中压蒸汽 “二回收一降”技术
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Mountain Wood vs. Lowland Wood Harvesting Methods: An Ecological Case Study
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作者 Anton Kraler Verena Krismer Georg Wieland 《Journal of Civil Engineering and Architecture》 2014年第1期89-99,共11页
Are Austrian mountain wood harvesting techniques more ecological than techniques applied in the lowlands of southern Germany? For this comparative study, the authors selected the area of Lower Bavaria for lowland woo... Are Austrian mountain wood harvesting techniques more ecological than techniques applied in the lowlands of southern Germany? For this comparative study, the authors selected the area of Lower Bavaria for lowland wood, as a great deal of wood is imported from this region to western Austria. At first, the felling area is described for both regions, from forest site to sawmill. Thereby, the authors create mean values related to timber harvesting and transportation, which are applicable to the whole of western Austria and Lower Bavaria, southern Germany. Secondly, the eco-balance of mountain and lowland wood is established. It is based on the following impact categories: global warming potential, acidification potential, eutrophication potential, ozone depletion potential and non-renewable primary energy. The environmental impact is more expressive if the results are applied to a specific construction part (i.e., glued laminated timber-ceiling). Our research study showed the eco-balance of western Austrian mountain wood is more favourable than the environmental impact of harvesting lowland wood in southern Germany. 展开更多
关键词 Mountain wood lowland wood harvesting techniques eco-balance global warming potential.
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