Abstract
Renovation Wave aims to boost the uptake of deep renovation towards the CO2 emission targets for 2030. In this perspective, there is the need of technologies and solution sets for improving the deep renovation process as well as demonstrating the performances for supporting the stakeholders in the decision-making process. To cope with the issue, this work presents a methodology for setting up a repository of building deep renovation packages that integrates industrialised facade technologies and more traditional solutions. The performances feeding into the repository have been evaluated by means of transient detailed simulations on a set of reference buildings in representative European climate conditions. The renovation packages are evaluated in terms of key performance indicators dealing with five areas: energy, comfort, pollutant emissions, cost, and renovation time. The defined repository includes 289 assessed technology packages and associated performances across Europe, providing a comprehensive support to identify the most effective solutions according to the user needs. The paper presents the application of the repository with two examples of stakeholders’ decision-making paths for selecting the deep renovation packages according to different priorities and expected targets.
Highlights
It has been estimated that around 75% of the European building stock is inefficient according to the current energy performance requirements, and more than40% of the buildings was built before 1960 [1], only 1% undergoes energy renovation each year [2]
Reference country: Spain (Barcelona) selection was performed by collecting the geometries of SFH and multifamily house (MFH) for the selected Geocluster Atl: Atlantic zone with cold oceanic climate and single-family houses period and in each reference country, and the archetypes presenting the median2dias main building type (84%), average U-value for opaque envelope 0.27 W/m K
The complexity and the size of the targeted building stock stated, the results present some limitations due to the approximations introduced for the analysis
Summary
It has been estimated that around 75% of the European building stock is inefficient according to the current energy performance requirements, and more than40% of the buildings was built before 1960 [1], only 1% undergoes energy renovation each year [2]. The European Commission sets the Climate Target Plan 2030 [3], which established a reduction in the EU CO2 emissions of 55% by 2030 (in comparison to 1990 levels) This means that buildings will be required to reduce their whole energy consumption for heating and cooling of at least of 18% in order to reach the 2030 target [2]. For enabling that path towards the target, at the end of 2020 the European Commission launched the Renovation Wave, aimed to tackle the main challenges that are currently undermining the uptake of energy renovation across Europe. Another objective is to foster the implementation of building deep renovation, namely a series of interventions leading to at least a 60% energy saving, which currently involves on average
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