气候变化领域集成服务门户(CCPortal): Carbon intensity of mass timber materials: impacts of sourcing and transportation

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DOI	10.3389/fbuil.2023.1321340
	Carbon intensity of mass timber materials: impacts of sourcing and transportation
	Atnoorkar, Swaroop; Ghatpande, Omkar A.; Haile, Selam L.; Goetsch, Heather E.; Harris, Chioke B.
发表日期	2024
EISSN	2297-3362
起始页码	9
卷号	9
英文摘要	Mass timber construction is widely considered a promising alternative construction method to reduce buildings' total life-cycle carbon emissions because wood is a carbon sink. Cross-laminated timber (CLT) panels, manufactured by gluing lumber layers with grains at right angles, are potential low-carbon alternatives to carbon-intensive concrete and steel construction. However, most environmental impact assessment studies do not consider variation in transportation impacts within the CLT supply chain when calculating life-cycle impacts. This study investigates the embodied primary energy and the global warming potential (GWP) of CLT supply chain decisions regarding the type of timber species used, the U.S. region it is sourced from, and the location of the CLT mill. Longer transport distances in the supply chain for timber and CLT panels can contribute as much as 923 MJ/m2 (20%) of the embodied primary energy of a CLT building, and the use of a higher-density timber species increases this contribution to 1246 MJ/m2 (24%), with most of that energy derived from fossil energy sources. For perspective, the GWP of a building whose CLT panels and timber have been transported by truck over 6,000 km (252-270 kgCO2/m2) is greater than the GWP of an equivalent reinforced concrete (RC) building (245 kgCO2/m2). Thus, factors like the location of CLT processing facilities and the type of timber species can significantly impact the overall life-cycle assessment and, if chosen appropriately, can mitigate the environmental impacts of CLT construction.
英文关键词	low-energy buildings; low-carbon building construction; mass timber; climate change; life cycle assessment; embodied carbon; embodied energy
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:001161046200001
来源期刊	FRONTIERS IN BUILT ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300700
作者单位	United States Department of Energy (DOE); National Renewable Energy Laboratory - USA
推荐引用方式 GB/T 7714	Atnoorkar, Swaroop,Ghatpande, Omkar A.,Haile, Selam L.,et al. Carbon intensity of mass timber materials: impacts of sourcing and transportation[J],2024,9.
APA	Atnoorkar, Swaroop,Ghatpande, Omkar A.,Haile, Selam L.,Goetsch, Heather E.,&Harris, Chioke B..(2024).Carbon intensity of mass timber materials: impacts of sourcing and transportation.FRONTIERS IN BUILT ENVIRONMENT,9.
MLA	Atnoorkar, Swaroop,et al."Carbon intensity of mass timber materials: impacts of sourcing and transportation".FRONTIERS IN BUILT ENVIRONMENT 9(2024).