Browsing by Keyword "Thermal performance"
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Item Characterization and thermal performance evaluation of infrared reflective coatings compatible with historic buildings(2018-04-15) Becherini, Francesca; Lucchi, Elena; Gandini, Alessandra; Casado Barrasa, Maria; Troi, Alexandra; Roberti, Francesca; Sachini, Maria; Di Tuccio, Maria Concetta; Garmendia Arrieta, Leire; Pockelé, Luc; Bernardi, Adriana; Tecnalia Research & Innovation; LABORATORIO DE TRANSFORMACIÓN URBANATwo infrared reflective coatings recently developed as part of the EFFESUS European research project are characterized and evaluated in this paper. Thermal performance, durability, compatibility with historic fabric, and reversibility are all analysed. The results of extensive research that include laboratory analysis of selected substrates, measurements on a large-scale traditional masonry mock-up, thermodynamic simulations, and finally application in to a real historic building in Istanbul, all support the potential of the new coatings to improve the thermal performance of historic buildings, in keeping with their visual integrity and cultural value. Besides their reflective properties, proven by the thermal stress reductions on the treated surfaces, the new coatings are characterized by low visual impact, easy application, material compatibility, and reversibility after application, as well as durability over time.Item On the analytical calculation of the solar heat gain coefficient of a BIPV module(2017-09-15) Baenas, Tomás; Machado, Maider; Tecnalia Research & InnovationA closed-analytical expression for the solar heat gain coefficient (SHGC) of a glass-glass photovoltaic module forbuilding-integration is constructed ab initio, from the thermal study of the general case of any number of planarparallel layers with homogeneous absorption of solar radiation. By introducing the optical model of Baenas andMachado, the expressions for the SHGC of the opaque and transparent parts of the module will be provided. Thescope of the calculation and the assumed working hypothesis are in line with those of international standards formultiple glazing systems and building-integrated photovoltaic modules. The proposed model has been applied to a real case of study, showing an excellent agreement with the numerical and experimental related data.