能值分析与碳足迹的建筑可持续性评价方法比较

对一个太阳能建筑案例“Sunny Inside”进行能值分析与碳足迹计算,分析二者结论的一致性与差异性.研究结果表明:在建筑全生命周期中,不可再生资源的能值投入和碳足迹分析结论一致,不可再生能值投入越多,产生的碳足迹也越多;能值分析将自然环境、社会和经济的可再生和不可再生资源都纳入考虑,侧重于从资源消耗的角度对建筑能耗进行计算,且可以直接评价建筑的可持续性;碳足迹方法则着眼于建筑的碳排放,用各个阶段、各种材料的CO₂排放量表示建筑对温室效应的影响.

Comparison of Building Sustainability Evaluation Methods Based on Emergy Analysis and Carbon Footprint

Energy analysis and carbon footprint were calculated for a solar building case “Sunny Inside”, to analyze the consistency and difference between their conclusions. The research results show that the energy input of non-renewable resources is consistent with the conclusion of carbon footprint in the whole building life cycle. The more the non-renewable energy input of building is, the more the carbon footprint is generated. Energy analysis takes into account renewable and non-renewable resources of natural environment, society and economy, focuses on calculating building energy consumption from the perspective of resource consumption, and can directly evaluate the sustainability of buildings. The carbon footprint method focuses on the carbon emissions of buildings, and uses the CO₂ emissions of various stages and materials to show the impact of buildings on the greenhouse effect.