从系统视角来看,建筑行业的使用后木材对气候的影响
1Department of Applied Physics and Electronics, Umeå University, 901 87 Umeå, Sweden.
Waste management (New York, N.Y.)
|September 23, 2023
概括
使用后木材的加工方式对温室气体排放和全球变暖潜力产生重大影响. 优化回收和再利用,以及碳捕获,可以减轻木材废弃物的气候变化影响.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 材料科学 材料科学 材料科学
背景情况:
- 生命周期结束的木材加工路径 (燃烧,填埋,回收,再利用) 影响材料和能源系统.
- 木材处理途径的选择会影响温室气体 (GHG) 排放,包括二氧化碳 (CO2) 和甲 (CH4),以及辐射强迫.
- 区域系统的观点对于评估后期木材管理对气候的影响至关重要.
研究的目的:
- 调查不同生命周期末期木材加工途径对气候变化的影响.
- 评估CO2和CH4排放的动态以及每个路径的累积辐射强迫.
- 分析使用后木材处理对材料和能源生产系统的影响及其对气候的影响.
主要方法:
- 分析来自各种木材使用后处理途径的温室气体排放量 (CO2,CH4).
- 计算与每个通路相关的累积辐射强迫.
- 从不同区域系统的角度进行评估,考虑参考材料和能源生产系统.
主要成果:
- 使用后木材的选择处理途径显著影响温室气体排放概况和全球变暖潜力.
- 在某些条件下,特别是低碳天然气能源系统下,使用后的木材可以对气候产生负面影响.
- 增加木材的再利用和回收利用对减缓气候变化产生了积极的影响,特别是在森林生物质动态方面,但这种影响主要是在早期阶段.
结论:
- 废旧木材的管理是气候变化缓解战略的关键因素.
- 具体上下文分析至关重要,因为木材加工对气候的影响因现有能源系统而异.
- 像碳捕获和储存等先进的策略,用于能源转换设施的生物二氧化碳排放,显示出潜在的冷却效应.
相关概念视频
Introduction to Wood
255
Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the...
The structural integrity of the...
255
Design Example: Sustainability in Concrete Building
183
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
183
Global Climate Change
24.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.4K
Wood Products
99
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
99
Seasoning of Wood
116
Seasoning of wood is a crucial process aimed at reducing and stabilizing the moisture content within the wood to prevent future shrinkage, structural damage, or aesthetic issues once the wood is used in construction. Wood naturally swells when it absorbs moisture and contracts as it dries.
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
116
Softwoods and Hardwoods
184
Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
184


