Abstract
The 2010 EPBD asks for an economic and social analysis in order to preserve social equity and to promote innovation and building productivity. This is possible with a life cycle energy cost (LCEC) analysis, such as with the SEC (Sustainable Energy Cost) model whose bottom up approach begins with a building typology including inhabitants. Then the analysis of some representative buildings includes the identification of a technico-economical optimum and energy retrofitting scenarios for each retrofitting programme and the extrapolation for the whole building stock. An extrapolation for the whole building stock allows to set up the strategy and to identify the needed means for reaching the objectives. SEC is a decision aid tool for optimising sustainable energy retrofitting strategies for buildings at territorial and patrimonial scales inside a sustainable development approach towards the factor 4. Various versions of the SEC model are now available for housing and for tertiary buildings.
Highlights
SEC and the life cycle energy cost (LCEC) tools are a necessary complement of energy existing tools in order to take into account economical efficiency, to preserve social equity and local jobs and to improve the building sector productivity
The potential level of energy savings for a building stock according to a technical point of view has to be compared with the potential level of energy savings including a social and economical analysis;
The French law (Grenelle 1) asks for an energy retrofitting up to 150 kWh/m2 · year and a lot of social owner manage their strategy according to this objective but for some buildings the technico-economic optimum is higher and they should manage to reach it and for others the technicoeconomic optimum is under this level and they should get subsidies for reaching this political level of energy performance;
Summary
The 2010 EPBD asks for an economic and social analysis in order to preserve social equity and to promote innovation and building productivity. This is possible with a life cycle energy cost (LCEC) analysis, such as with the SEC (Sustainable Energy Cost) model whose bottom up approach begins with a building typology including inhabitants. The analysis of some representative buildings includes the identification of a technico-economical optimum and energy retrofitting scenarios for each retrofitting programme and the extrapolation for the whole building stock. Esto es posible con el análisis del coste global ampliado y especialmente con el modelo SEC. Palabras clave: Coste global ampliado, estrategia de rehabilitación energética sostenible, optimo técnico-económico
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