Life cycle energy and environmental performance of a new university building: modeling challenges and design implications
Life cycle energy and environmental performance of a new university building: modeling challenges and design implications
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DOI：
10.1016/s0378-7788(03)00066-5
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发表时间：
2003-11
影响因子：
6.7
通讯作者：
Christoph Scheuer;G. Keoleian;Peter Reppe
中科院分区：
文献类型：
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作者：
Christoph Scheuer;G. Keoleian;Peter Reppe
一个全面的案例研究生命周期评估（LCA）进行了一个7300平方米，六层楼的建筑，预计寿命为75年，位于密歇根大学校园。底部三层和地下室用作教室和开放式办公室;顶部三层用作酒店客房。对所有安装材料和材料更换进行了清点，包括建筑结构、围护结构、内部结构和饰面以及公用设施和卫生系统。利用计算机建模确定供暖、制冷、通风、照明、热水和卫生用水的一次能源消耗。拆除和其他寿命终了的负担也被清点。建筑物生命周期内的一次能源强度估计为2.3× 106 GJ，或316 GJ/m2。建筑材料的生产、运输到工地以及建筑物的建造占生命周期一次能源消耗的2.2%。暖通空调和电力占生命周期一次能源消耗的94.4%。供水服务占生命周期一次能源消耗的3.3%，由于该建筑中存在酒店客房，水加热是主要因素。建筑物拆除和废物运输，仅占生命周期一次能源消耗的0.2%。所测量的所有影响类别（全球升温潜能值、臭氧消耗潜能值、酸化潜能值、营养潜能值和固体废物产生）都与一次能源需求密切相关。在开发一个复杂的动态系统的生命周期模型，具有较长的使用寿命的挑战进行了探讨和未来的设计的影响进行了讨论。
A comprehensive case study life cycle assessment (LCA) was conducted of a 7300m2, six-story building with a projected 75 year life span, located on the University of Michigan campus. The bottom three floors and basement are used as classrooms and open-plan offices; the top three floors are used as hotel rooms. An inventory of all installed materials and material replacements was conducted covering the building structure, envelope, interior structure and finishes, as well as the utility and sanitary systems. Computer modeling was used to determine primary energy consumption for heating, cooling, ventilation, lighting, hot water and sanitary water consumption. Demolition and other end-of-life burdens were also inventoried. The primary energy intensity over the building’s life cycle is estimated to be 2.3×106GJ, or 316GJ/m2. Production of building materials, their transportation to the site as well as the construction of the building accounts for 2.2% of life cycle primary energy consumption. HVAC and electricity account for 94.4% of life cycle primary energy consumption. Water services account for 3.3% of life cycle primary energy consumption, with water heating being the major factor, due to the presence of hotel rooms in this building. Building demolition and transportation of waste, accounts for only 0.2% of life cycle primary energy consumption. All impact categories measured (global warming potential, ozone depletion potential, acidification potential, nutrification potential and solid waste generation) correlate closely with primary energy demand. The challenges in developing a life cycle model of a complex dynamic system with a long service life are explored and the implications for future designs are discussed.