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Esquivias, P.M.; Moreno, D.; Fernández-Expósito, M. (2014, 2-3 de Octubre). Ahorro energético y confort lumínico: la protección solar en el paradigma de la arquitectura actual

CONGRESO: Greencities & sostenibilidad: inteligencia aplicada a la sostenibilidad urbana. Comunicaciones y 2ª bienal de proyectos de edificación y urbanismo sostenible, 2014

PÁGINAS: 349-365

CIUDAD: Málaga (España)

ABSTRACT:

Although the most visible aspect of Directive 2010/31/UE has been an upsurge in requirements for thermal insulation in buildings, reflected in the modification of the Basic Document HE, is to strategies which enhance the thermal performance of buildings in summer to which this directive promote to avoid an increasing of the costs of electricity as well as the disruption of energy balance of the member states.

Without doubt, countries with warmer climates have a large constructive tradition in avoiding excessive solar thermal radiation into our buildings, being good examples of this the urban structure of the historic city centres, the residential courtyards and the development of solar protection devices.

The internationalization and importation of architecture from the northern Europe, where local climatic conditions require large glazed surfaces due to thermal and lighting arguments, encouraged use and development of operable solar protection devices put in the inner side of the building. However, solar thermal radiation is not avoided to enter, having overheating as a result. Also, usually these devices are not well used and a common scenario is having the blinds closed and the electric light on, increasing, of course, the energy consumption in building, both for thermal and lighting conditioning.

The external solar protection devices, well-designed, block solar radiation during the time of the year required, mitigating, thus, overheating of these spaces, and the probability of glare due to the presence of direct sunlight producing excessive contrast.

The most common types of solar protection are overhangs, louvers, fixed or mobile, and textile items like awnings.

Furthermore, the actual evolution of Architecture provides several examples of iconic buildings covered by a second skin, usually designed by aesthetic reasons, but, is not this skin but rather a large, unitary and homogeneous solar protection device for the whole building? How does the design, at first instance of arbitrary geometry, affect the thermal and luminous interior building environment?