%0 Journal Article 
%A Oregi, Xabat
%T Techno-economic evaluation of building energy refurbishment processes from a life cycle perspective

%D 2015
* UPV-EHU
%X Based on the new energy performance limitations determinate by the Directive 2010/31/EU, the buildings become more energy efficient and the impact of the operational stages is reduced, increasing the relevance of the environmental and economic impact of the other life cycle stages. In addition, the energy refurbishment requirements are increasing, generating the need to integrate the life cycle methodology during the prioritization process between the different energy-efficient retrofitting strategies for buildings. 
However, despite the Life Cycle methodology has already been standardized, as buildings are extremely complex systems, a lot of studies usually apply some simplifications to reduce the time of the evaluation. Based on these simplifications and seeing that when talking about the energy renovation of an existing building, the main objective is focused on reducing its impact during its operational stage, are being generating various questions in relation to the need and added value of the application of the Life Cycle methodology: what extent can the boundary system be simplified without reducing the accuracy of the results? What is the relationship between the impact reduced during the operational stage and the impact generated during the other stages of the life cycle? What are the most relevant parameters and/or stages when conducting a study and making a decision?
In order to seek an answer to these questions on the basis of the EN 15978 and prEN 16627 standards, this research work proposed a quantitative methodology to allow assessment of the impact generated at each stage in the life cycle of an energy-efficient retrofitting of a building. The methodology proposed is validated using a building constructed in San Sebastian (Spain) in 1963. However, given the possible disadvantages of treating these results based on a single case of study as overall conclusions, the research proposes an exhaustive sensitivity analysis presenting new scenarios related to most of the parameters that have a direct influence on the method of calculation. After analysing all the new scenarios defined using these data, the results obtained make it possible to give an answer concerning the relationship between the increased accuracy of the results and the quantification of all the stages in the life cycle.
%K building energy refurbishment
%K economic and environmental life cycle assessment
%K evaluation scope optimization
%K multicritery decision making
%K data quality
%K uncertainty
%K cut-off rules
%U http://hdl.handle.net/11556/164
%~ GOEDOC, SUB GOETTINGEN