建筑外墙不同选材方案的碳排放量对比分析

Comparison and Analysis on Carbon Emission of Building Facades with Different Material Selections

将碳排放量作为建筑选材方案的评价指标之一,研究将外墙不同选材方案的碳排放量进行对比分析。基于不同保温材质相同保温效果的4种方案碳排放量计算分析表明,材料生产阶段碳排量相差较大,碳排放量最大的为200mm复合砖,因其保温填料灌装工序需要额外消耗能源,增加材料生产阶段的碳排放量,因保温效果相同,使用阶段的碳排放量也基本相同。基于相同保温材质不同砌体材质的3种方案碳排放计算结果表明,尽管同等砌体材料厚度下,复合砖材料生产阶段的碳排放量较大,但相对于普通烧结页岩空心砖、蒸压加气混凝土砌块而言,复合砖具有更好的热工性能,可降低使用阶段的能耗,减少使用阶段的碳排放量。

Carbon emission is adopted as one of the evaluation indicators in building material selections. The carbon emissions of building facades with different facades with different material selections are compared and analyzed. Based on the carbon emissions of four different kinds of programs where insulating materials differ but insulating effect remains the same, it shows that carbon emissions differ significantly at material production phase, and the greatest carbon emission is caused by 200mm bricks,because it consumes extra energy resources in insulation filler filling process, increasing carbon e-missions at material production phase, but it shares the same carbon emissions at application stage for the same insulating effect. Based on the carbon e-missions of three different kinds of programs where insulating materials are the same but the masonry materials differ, it shows that with the same mason-ry material thickness,carbon emissions of composite tile materials is significant at production stage, but with respect to the ordinary sintered shale hollow bricks and autoclaved aerated concrete blocks,the composite tile has better thermal performance,and can reduce energy consumption at the use phase and the carbon emission as well.