37º IAHS World Congress on Housing: - Universidad de Cantabria

XXXVII <strong>IAHS</strong><strong>World</strong> <strong>Congress</strong> on HousingOctober 26 – 29, 2010, Santander, SpainCODE: 235OPTICAL AND THERMAL DESIGN AND MODELLING OFARCHITECTURAL SHADING SYSTEMSR. Garay, N. Tellado, I. ApraizConstruction Unit. Building and Sustainable Urban Environment.Labein-TecnaliaParque Tecnológico de Bizkaiac/ Geldo. Edificio 70048160 Derio, Bizkaia, SpainE-mail: rgaray@labein.esKey words: Energy efficiency, shading, cooling, heating, building.AbstractThe use of shading elements in building façades is a common resource when an energyefficient building is designed, moreover in warm climates. Nevertheless, commonly usedbuilding thermal modelling tools, only allow a simplified definition of the shading elementgeometry. In order to design better performing shading elements, an accurate characterizationof the geometry and the optical and thermal performance of the elements should be carried outand their effects on the energy efficiency of the building simulated.This study describes the thermal and optical characterization and modelling of a 3D shapedmetallic façade shading element and the resulting new Type for TRNSYS. This Type enablesthe simulation of the energy performance of the shading element when placed in buildingfaçades. Energy performance simulations for office buildings, for different façade orientationsand in several climatic zones in Europe have been carried out. The results are compared andthe most appropriate and performing applications of these elements are assessed.37º <strong>IAHS</strong> <strong>World</strong> <strong>Congress</strong> On Housing Science 130