Luz y sabor. Ambientes de restaurantes con vista-lateral y luminancias exteriores elevadas

Abstract

This work deals about daylighting for indoor quality atmospheres, considering building skins and side-view in order to achieve good light balance. We test the vision perception provided by highly glazed façades. As case study, a restaurant in Zarautz with Atlantic climate has been assessed under outside midday high luminance. The selected picture can be identified as restaurant via MIT Scene Recognition software and is representative to describe working and socializing atmospheres. Mean global perception obtained can be better with the use of different workplanes. The analysis has been done defining three workplanes, “table”, “person” and “outside”. Therefore, we get high dynamic range photographs of each workplane to obtain luminance maps and DGP(Daylight Glare probability) index. The obtained DGP shows glare probability. If in the global perception the adaptation from intermediate workplane is considered, the DGP is less than if just only one workplane is considered. With the use of three visual fields improves the tolerance of outside high luminance, but even so, there is glare and stressful situation to concentrate on tasting activity, and consequently the outside views are not comfortable, as well as, privacy is affected. In conclusion, highly glazed façades are not able to control accurately the entering light to facilitate concentration and to permit tasting the atmosphere. A split façade could better light each workplane, and the dissociation between side-view and lighting requirements could improve the indoor light balance.