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Overview on life cycle methodologies and economic feasibility for nZEBs

机译：nZEB的生命周期方法和经济可行性概述

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The recast Directive on the energy performance of buildings (EPBD) stipulates that by 2020 all new buildings constructed within the European Union after 2020 should reach nearly zero-energy levels. This means that in less than one decade, all new buildings will demonstrate very high energy performance and their reduced or very low energy needs will be significantly covered by renewable energy sources. Such change is affecting both the nature of the built environment as well the actual method of designing and constructing a facility. The economic feasibility to realize a sustainable construction need to have a clear support by adequate analyses connected to the energy consumption and consequently to the new target reductions in greenhouse gas emissions for buildings. Life Cycle Methodologies (LCMs) are currently not considered in details on the EPBD recast, but according also to recent researches, they might be important tasks in a future recast. The paper analyses this challenge providing an overview on the main LCMs to individuate principles, limitations and implications of these approaches to design a Nearly Zero Energy Building (nZEB).
机译：关于建筑物能源性能的重铸指令（EPBD）规定，到2020年，欧盟内部在2020年以后建造的所有新建筑物都应达到几乎零能耗的水平。这意味着在不到十年的时间内，所有新建筑都将表现出非常高的能源性能，可再生能源将大大满足其减少或非常低的能源需求。这种变化既影响建筑环境的性质，也影响设计和建造设施的实际方法。要实现可持续建筑的经济可行性，需要通过与能源消耗以及因此与减少建筑物温室气体排放这一新目标有关的适当分析得到明确的支持。目前在EPBD重铸中并未详细考虑生命周期方法（LCM），但根据最近的研究，它们可能是未来重铸中的重要任务。本文分析了这一挑战，概述了主要的LCM，以区分这些方法来设计接近零能耗的建筑物（nZEB）的原理，局限性和含义。

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