Carbon dioxide balance of wood substitution: Comparing concrete- and wood-framed buildings

被引:233
作者
Gustavsson L. [1 ]
Pingoud K. [2 ,3 ]
Sathre R. [1 ]
机构
[1] Ecotechnology, Mid Sweden University
[2] Finnish Forest Research Institute, FIN 00170 Helsinki
[3] VTT Processes, Espoo
关键词
Biofuels; Biomass; Building materials; Carbon dioxide; Concrete; Forest industry; Greenhouse gas balance; Wood;
D O I
10.1007/s11027-006-7207-1
中图分类号
学科分类号
摘要
In this study a method is suggested to compare the net carbon dioxide (CO2) emission from the construction of concrete- and wood-framed buildings. The method is then applied to two buildings in Sweden and Finland constructed with wood frames, compared with functionally equivalent buildings constructed with concrete frames. Carbon accounting includes: emissions due to fossil fuel use in the production of building materials; the replacement of fossil fuels by biomass residues from logging, wood processing, construction and demolition; carbon stock changes in forests and buildings; and cement process reactions. The results show that wood-framed construction requires less energy, and emits less CO2 to the atmosphere, than concrete-framed construction. The lifecycle emission difference between the wood- and concrete-framed buildings ranges from 30 to 130 kg C per m2 of floor area. Hence, a net reduction of CO2 emission can be obtained by increasing the proportion of wood-based building materials, relative to concrete materials. The benefits would be greatest if the biomass residues resulting from the production of the wood building materials were fully used in energy supply systems. The carbon mitigation efficiency, expressed in terms of biomass used per unit of reduced carbon emission, is considerably better if the wood is used to replace concrete building material than if the wood is used directly as biofuel. © Springer 2006.
引用
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页码:667 / 691
页数:24
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