Wooden-building Life Cycle Carbon Footprint and Forestry Carbon Sink Assessment

• Main Authors: Kuan-Hsien Li, 李冠賢
• Other Authors: Chyi-Rong Chiou
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/6rbagb

碩士 === 國立臺灣大學 === 氣候變遷與永續發展國際學位學程 === 107 === Buildings contribute significantly to Greenhouse gas emissions, because of the high-energy consumption and the material used. By finding out a way to reduce the Greenhouse gas (GHGs) emissions of building, we can slow down climate change. In addition, the carbon substitution of wooden products can store GHGs in the wood, and free land for planting new saplings to absorb more carbon. According to the ISO 14025 specification and the CFP-PCR the life cycle assessment of buildings in Taiwan is divided into five phases: Materials Manufacturing, Construction, Use phase, Maintenance and End-of-life. There is many research about reducing carbon emission in civil engineering, but most of this research did not consider carbon storage project to import the concept of carbon substitution. Thus, to sum up the carbon substitution totally, this research calculated the carbon substitutions of wooden building by life-cycle assessment (LCA) and also model the forestry in Taiwan. We established a model to take into account the storage benefits of carbon substitution. The model can estimate the carbon reduction from replacing reinforced concrete buildings (RC-building) with Cross-Laminated-Timber buildings (CLT-building). This study is based on the LCA of RC-building and CLT-building. The two parameters,「GHGs emission of non-wooden product」and「GHGs emission of wooden product」, were put into this model. Because of the multiple effects of forestry management, we let the 「GHGs storage in wooden product」become a part of Materials Manufacturing Phase in CLT-building. It reduces 232,137 KgCO2e emission in life cycle, and needs 85 m3 wood by using CLT-building instead of RC-building in a four-floor building.