Caracterização otica em materiais transparentes e sua relação com o confortoambiental em edificação

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

In this work, the characterization and analysis of the solar radiation transmission through transparent materials appropriated for buildings façades is presented. Materials such as reflective sputtered glasses, polycarbonates and commercial polymeric films for solar control on float glass are studied. The electrocromic glass type, promissory new material under development, is also analyzed. The optical behavior of such materials in the different ranges of the solar spectrum: ultraviolet, visible and the infrared, and their performance concerning thermal comfort are compared and discussed. The analysis of spectral transmission by these materials is carried out through spectrophotometric technique. The results show that both reflective sputtered glasses and polarized electrocromic device present low transparence to infrared, and under some conditions, are transparent to the visible light, as well. The polycarbonates present high transparence over all solar spectrum ranges, with the exception of the ultraviolet region, to which they are opaque. Non-reflective solar control films are highly transparent to infrared radiation and a few to the visible light. Reflective glasses present low transmission in these regions. Both kinds of films are however practically opaque to ultraviolet radiation. The results provide specifications and indicatives for the appropriated uses of transparent surfaces in buildings, enriching the few amount of technical data ordinary available to professionals

ASSUNTO(S)

radiação solar vidro na construção conforto termico

ACESSO AO ARTIGO

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