Energy renovation of a school building, a legacy of the cultural heritage of the City of Tournai: Ecole du Vieux Chemin d'Ere

摘要

This paper treats on the one hand the evolution of EPB requirements in Walloon Region and on the other hand the energy audit of a building belonging to the building stock of the City of Tournai. A standards history has been established since 1985, precisely when the first insulation standards appeared in Walloon Region, while nowadays several levels of requirements, regarding the maximum heat transfer coefficient, the global isolation level or even level of primary energy consumption, are imposed. The building which this study deals with is an educational institution from the latest seventies, located in the southwest, extramural part of the city of Tournai. A detailed inventory of fixtures was conducted to estimate areas which need improvements and to reduce energy consumption (thermal, electrical,...). Various elements of the building were reviewed with the assistance of EPB software: the building envelope (insulation of different walls), the heating system, its regulation, energy consumption (fuel and electricity). At the end of this study, recommendations are offered to help the municipality, as building owner, in the choice of priority interventions to be undertaken to improve energy efficiency. Consultation of different literary sources allowed the analysis of different measures related to energy efficiency in buildings such as architectural measures, including the choice of the insulation type, and measures related to the types of technical installations, as well as installations which produced and managed energy that influences the energy performance of a building. To determine the relevance of an investment in any project, it is necessary to establish the costs it generates and the gains it provides, in other words the return which is achieved in comparison with provided energy investment. Some indicators of project profitability are briefly explained and for each proposition for the improvement of studied school building envelope is executed the calculation of energy benefit and the time of return of the proposed investment.