楼宇升级再造或楼宇重建?支持可持续城市投资决策的“全球效益”视角

IF 2.4 Q3 ENVIRONMENTAL SCIENCES
Elena Fregonara
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引用次数: 0

摘要

关于拆除和重建与翻新现有建筑存量的投资决策可以超越金融和经济标准。然而,它们必须涉及能源节约、环境保护、材料消耗和可持续城市的废物管理。过去几十年使用的监管框架和相关研究似乎更倾向于遏制建筑能耗,而不是生产过程中的体现能源管理和环境影响管理。在面对改造项目经济评估方法的局限性时,涉及到一些具有挑战性的前沿问题,这预示着对电子电气更严格的监管框架的前景,例如禁止转移具有剩余能源潜力的材料,例如垃圾填埋场的废物。因此,本研究旨在提出一种推理和操作模式,以支持城市治理政策和投资决策,涉及建筑部门的私人和公共主体。循环经济和生命周期思维原则,通过生命周期成本(LCC)和生命周期评估(LCA),假设和协调贴现现金流分析(DCFA):(1)货币化和建模到DCFA的EE和隐含碳(EC);(2)将全球成本和新的“全球效益”内部化到净现值(NPV)计算中;(3)侧重于从早期设计和投资决策阶段计算剩余终寿命价值。推理可以扩展到单个建筑,城市规模,甚至是城市地区现有建筑的整个部分,涉及类型学子段。在具体应用城市管理政策和可持续的公私伙伴关系,包括甚至在私人房地产投资决策过程中的环境和因此的社会外部性,以及在不断变化的规章范围内,还有待探索这种运作方式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Building upcycling or building reconstruction? The ‘Global Benefit’ perspective to support investment decisions for sustainable cities
Investment decisions on demolition and reconstruction vs. refurbishment of the existing building stock can extend beyond financial and economic criteria. However, they must involve energy savings, environmental preservation, material consumption, and waste management for sustainable cities. The regulatory framework used in the past decades and the correlated research seem more unbalanced toward the containment of building energy consumption than toward embodied energy (EE) management in production processes and environmental impact management. Foreshadowing the perspective of a more restrictive regulatory framework on EE, such as prohibiting the displacement of materials with residual energy potential, such as waste in landfills, some challenging frontier issues are involved when facing the limits of the economic evaluation methodologies for transformation projects. Thus, this study aimed to propose a reasoning and an operative modality to support urban governance policies and investment decisions involving private and public subjects in the construction sector. Circular economy and life cycle thinking principles, through life cycle costing (LCC) and life cycle assessment (LCA), are assumed and harmonized with the discounted cash-flow analysis (DCFA): (1) monetizing and modeling into the DCFA the EE and the embodied carbon (EC); (2) internalizing the Global Cost and the new ‘Global Benefit’ into the net present value (NPV) calculation; and (3) focusing on the residual end-of-life value calculation from the early design and investment decision stages. The reasoning can be extended to single buildings, the urban scale, or even entire portions of existing buildings in urban areas concerning typological sub-segments. The operative modality is yet to be explored in a concrete application for orienting urban governance policies and sustainable public–private partnerships, including environmental and, thus, social externalities even in the private real estate investment decision process, in the scope of evolving regulations.
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来源期刊
CiteScore
4.00
自引率
7.10%
发文量
176
审稿时长
13 weeks
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