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首页> 外文期刊>Wood and Fiber Science >Life-cycle inventory of manufacturing hardwood lumber in southeastern US.
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Life-cycle inventory of manufacturing hardwood lumber in southeastern US.

机译：美国东南部制造硬木木材的生命周期清单。

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摘要

Environmental impacts associated with the building industry have become of increasing importance. Materials and energy consumed during manufacture of building materials such as lumber affect a building's environmental performance. This study determined environmental impacts of manufacturing hardwood lumber in the southeastern US using the life-cycle inventory method. Primary data were collected and then weight-averaged on a per-unit basis of 1.0 m3 of planed dry lumber (600 oven-dry kg/m3) to find material flows and energy use. Cumulative allocated energy consumption for manufacturing 1.0 m3 planed dry lumber from 2.44 m3 of incoming logs was 5.86 GJ/m3 with 66% from wood fuel. Emission data produced through modeling estimated total biomass and fossil carbon dioxide production of 424 and 131 kg/m3, respectively, considering all impacts. A cubic meter of planed dry hardwood lumber stores 1.17 Mg CO2 equivalents as a final product. The amount of carbon stored in hardwood lumber exceeds fossil carbon emissions by a factor of nine. Therefore, as long as hardwood lumber and its carbon stay in products held in end uses, carbon stored will exceed fossil carbon emitted in manufacturing.
机译：与建筑业相关的环境影响变得越来越重要。木材等建筑材料制造过程中消耗的材料和能量会影响建筑物的环境性能。这项研究使用生命周期清单方法确定了美国东南部生产硬木木材对环境的影响。收集原始数据，然后以1.0 m 3 刨干木材（600烘箱干燥的kg / m 3 ）为单位进行重量平均，以查找材料流量和能源使用。生产的1.0 m 3 刨干木材的累计分配能源消耗为2.44 m 3 的原木进口量为5.86 GJ / m 3 ，其中66％来自木材燃料。考虑所有影响，通过建模估算的总生物量和化石二氧化碳总产量分别为424和131 kg / m 3 。一立方米的计划干硬木木材存储的最终产品为1.17 Mg CO 2 当量。硬木木材中存储的碳量超过化石碳排放量的九倍。因此，只要硬木木材及其碳保留在最终用途产品中，储存的碳将超过制造过程中排放的化石碳。

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