Eficiencia energética en edificios patrimoniales: análisis y monitorización de tres casos Energy Efficiency in heritage buildings: analysis and monitoring of three cases Author/s: José Luis González Moreno-Navarro, Inma Rodríguez Cantalapiedra, Montse Bosch, Mariona Genis, Joan Olona Institution or Company: Universidad Politécnica de Catalunya (UPC) Abstract The pressure for the progressive reduction of energy spending in buildings, has been increasing as regulations such as the CTE or the new European directive on energy efficiency and have expanded their demands by extending its scope to existing buildings. However buildings with heritage values are excluded from these objectives, and hence being relegated to obsolescence energy. It’s necessary to find a balance between controlling the energy consumption of these buildings and their heritage values which are increasingly recognized as an economic engine. The research team presents part of the broader research that aims to develop a methodology for action to improve the energy efficiency of historic buildings taking into account its heritage values. To achieve this goal we work on four aspects: energy assessment on the demand and performance, the monitoring of buildings, their energy consumption on indicators, and user comfort. The specific objectives were proposed to establish a methodology of diagnosis in the heritage buildings to assess the degree of compliance level in order to evaluate intervention solutions compatible with the performance and the degree’s protection. This methodology is understood as included within the overall diagnostic process on the whole building. The resulting values of this first identification wants to validate the correctness of the analytical results obtained regarding the results of the tests performed, in particular heat flux measurements, temperature and humidity. ISO 9868:1994 specifies a method for measuring heat flow, based on lines perpendicular heat flow without significant lateral flows. Properties can be measured are thermal conductivity and surface to surface at ambient temperature transmittance, if the temperatures of the two environments can also be measured and are stable. After obtaining the monitoring data, it can be compared with those obtained by calculation using the standard ISO 6946-1986. Characterisitcs of the buildings: The buildings choosen are a sample set of buildings of all the work and there are used only to provide support to the methodology used. The sample tries to show different construction types based on traditional manufacturing solutions (masonry, masonry and brick masonry) and assess its performance in relation to modern solutions. The component that unites all of the sampled buildings is heritage values. The types studied are buildings of three different periods. The first is the Nautical Faculty of Barcelona, neoclassical style of early twentieth century. The second one is an Industrial School of Art Nouveau style of the early twentieth century. The third is a building housing by the modern architecture of mid-twentieth century. The study is divided into four phases: Phase 0: Energetic diagnosis Phase 1. Characterization of the constructive solutions Determination of the historical, and geometric and construction values. ISO 6946-1 Values Phase 2. Monitoring of chosen buildings. Systematic development of diagnosis established by ISO 9869 in terms of hygrometric and thermal transmittances Surround verification and analysis by performing thermographic pictures Validation results against expected values. Phase 3: Analysis of results ARCHITECTURE AND CRISIS
89