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Life cycle assessment approach for the optimization of sustainable building envelopes: An application on solar wall systems

机译：用于优化可持续建筑围护结构的生命周期评估方法：在太阳能墙系统上的应用

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摘要

Design of sustainable building envelopes requires the analysis of environmental performances in every stage of their life cycle. As a matter of fact, the production phase of building materials and components can significantly contribute to the total energy consumption and environmental loads of buildings. However, facade systems such as passive solar systems, ventilated walls and double skins, are usually not designed considering aspects related to their life cycle. Furthermore, there are still few studies concerning the optimization and the combined effect of different design features of complex facades on environmental and energy performances. This paper introduces an integrated approach for the optimization of energy and environmental performances of complex building envelopes that combines life cycle assessment, energy simulation and optimization analysis with factorial plan technique. The environmental performance was calculated in terms of energy demand and CO_2 emissions in the production phase and operational phase. The methodology was applied to an exemplary case study with solar wall systems. The results showed that solar walls have high environmental impact both in the production and operational phases. Results of the optimization analysis demonstrated that it is possible to reduce the CO_2 emissions and cumulative energy demand of solar walls for both the production and use phases up to -55% in comparison with a traditional design. This methodology may be generally applied to the sustainability analysis, design and optimization of efficient facade systems.
机译：可持续建筑围护结构的设计需要分析其生命周期各个阶段的环境绩效。实际上，建筑材料和组件的生产阶段会极大地影响建筑物的总能耗和环境负荷。然而，诸如被动式太阳能系统，通风墙和双层外皮之类的立面系统通常在设计时就没有考虑与其生命周期相关的方面。此外，关于复杂外墙的不同设计特征的优化及其对环境和能源性能的综合影响的研究还很少。本文介绍了一种综合方法，用于优化复杂建筑围护结构的能源和环境性能，将生命周期评估，能源模拟和优化分析与析因计划技术相结合。根据生产阶段和运营阶段的能源需求和CO_2排放量来计算环境绩效。将该方法应用于带有太阳能墙系统的示例性案例研究。结果表明，太阳能墙在生产和运营阶段均具有较高的环境影响。优化分析的结果表明，与传统设计相比，在生产和使用阶段，可将CO_2排放量和太阳能墙的累积能量需求减少多达-55％。该方法通常可以应用于高效外墙系统的可持续性分析，设计和优化。

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