PDF《基于生命周期评价的井干式木结构 建筑环境影响研究》

林业工程学报, 2017,2(6):133-138 Journal of Forestry Engineering doi:10.

13360 / j.issn.2096-1359.2017.06.023 收稿日期:2017-05-06 修回日期:2017-07-11 基金项目: 十二五 国家科技支撑计划项目(2015BAD14B0501). 作者简介:胡家航,男,研究方向为木结构. 通信作者:郭明辉,女,教授. E?mail:gmh1964@ 126.com 基于生命周期评价的井干式木结构 建筑环境影响研究 胡家航,姬晓迪,代倩,郭明辉? (生物质材料科学与技术教育部重点实验室(东北林业大学),哈尔滨 150040) 摘要:分析了井干式木结构的环境影响,为木结构建筑企业的节能减排提供参考. 基于生命周期评价方法,根 据工厂搜集的基础数据清单,采用 GaBi 6?

0 软件分析了

1 m2 井干式木结构产品物化过程(从原材料开采到产品 出厂的生命周期)中的原材料消耗、能源消耗以及对环境的污染排放,并利用软件提供的 CML2001 方法和数据 库评价了井干式木结构产品生命周期范围内造成的环境影响. 结果表明:制造

1 m2 井干式木结构产品,全球变 暖潜值、人体毒性、非生物资源耗竭、环境酸化、光化学臭氧生成潜力和富营养化的加权后结果依次为-7? 54* 10-8 ,7? 19*10-8 ,1? 79*10-8 ,1? 51*10-8 ,9? 94*10-9 和3? 79*10-9 . 其中,全球变暖潜值和人体毒性是墙体产品环 境影响的主要类型,分别占环境影响总值的-174? 0%和166? 0%. 木结构产品从原材料获取到产品出厂可分为 原材料获取、预制和运输过程

3 个子系统,而预制过程为环境影响的主要阶段. 除去原材料获取过程中木材固 定大量 CO2 对环境的积极影响,在环境污染方面,人体毒性占总环境影响的 166? 0%,为污染的绝大部分,主要由 原木加工、锯材干燥、地板加工和墙体加工等工艺产生的粉尘而导致. 关键词:井干式木结构建筑;

环境影响;

物化过程;

生命周期评价 中图分类号:TU366? 2;

X383 文献标志码:A 文章编号:2096-1359(2017)06-0133-06 Environmental impact of log house based on life cycle assessment HU Jiahang, JI Xiaodi, DAI Qian, GUO Minghui? (Key Laboratory of Bio?based Material Science &

Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China) Abstract:Analyzing the impacts of log house on environment could promote the energy conservation and emissions re? duction of wood structure enterprise. Based on the cradle?to?gate inventories from factory, considering

1 m2 log house as a functional unit, life cycle assessment (LCA) was used to examine the raw material, energy consumption and en? vironment emissions of the materialization process. Furthermore, the CML2001 method and database provided by GaBi were used to evaluate environment impact of wooden house product in the life circle scope. The results showed that six impact categories were assessed in detail in the LCA study, i.e., global warming potential (GWP), human toxic potential (HTP), acidification (AP), eutrophication (EP), photochemical ozone creation potential (POCP) and abiotic depletion (ADP), and their results were -7? 54*10-8 , 7? 19*10-8 , 1? 79*10-8 , 1? 51*10-8 , 9? 94*10-9 and 3? 79*10-9 , respectively. The GWP and HTP were mainly responsible for the total amount of the environmental impacts in the preparation of wall product, accounted for -174? 0% and 166? 0%, respectively. A wood manufacturing factory was assessed in detail, and the process was divided into three subsystems:the raw material obtaining phase, the prefabrication phase and the transportation process. The prefabrication phase was mainly responsible for the log house fabrication. Excluding the positive impact of the photosynthesis, HTP was mainly responsible for the environ? mental deterioration. The detailed analysis of each stage indicated that the most important environmental hot spot of HTP was the dust appeared during wood manufacture such as timber drying, etc. Keywords:log structure;