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A review of the limitations of life cycle energy analysis for the design of fabric first low-energy domestic retrofits

机译：生命周期能量分析在面料首次低能耗家用改造设计中的局限性回顾

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摘要

Reduction of energy for space heating through retrofit interventions is imperative to meet carbon reduction targets in many temperate climates. A Life Cycle approach to retrofit design has the potential to reveal the balance between projected operational energy savings, and embodied energy invested in an intervention, and therefore optimise the extent of retrofit. However, life cycle energy analysis (LCEA) suffers from inconsistent methodologies across studies, and is rarely used for retrofit projects. A preliminary meta-analysis was conducted, drawing on LCEA data from domestic new builds and retrofits from the last twenty years. Whilst recent literature conversations indicate that embodied energy increases with decreasing operating energy, the meta-analysis is inconsistent with this. This review critiques the limitations and sources of variation in LCEA, focuses on how these compromise its value as part of the building design process and when comparing between projects, and recommends approaches which add value for building designers. This review has identified a need for research to elucidate a transferrable approach for determining the lowest life cycle energy for any retrofit, and also a need for a more robust data set of domestic retrofit LCEA. (C) 2019 Elsevier B.V. All rights reserved.
机译：为了在许多温带气候下实现减碳目标，必须通过改造措施减少空间供暖的能源。生命周期改造设计方法有可能揭示预计的运营能源节省与干预措施中所体现的能耗之间的平衡，从而优化改造的范围。但是，生命周期能量分析（LCEA）的研究方法不一致，因此很少用于改造项目。进行了初步的荟萃分析，借鉴了过去20年中来自国内新建和改造的LCEA数据。尽管最近的文献讨论表明，随着操作能量的降低，内含能量会增加，但荟萃分析与此不一致。这篇评论批评了LCEA的局限性和变化的根源，着眼于这些如何在建筑设计过程中以及在项目之间进行比较时如何折衷其价值，并提出了为建筑设计师增加价值的方法。这项审查确定了需要进行研究以阐明一种可转换的方法来确定任何改型的最低生命周期能量的需求，并且还需要一个更强大的家用改型LCEA数据集。 （C）2019 Elsevier B.V.保留所有权利。

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