New daylight redirecting devices: evaluation of their performance under real sky condition / Sistemas inovadores de iluminação natural : estudo de seu desempenho sob condições de ceu real em Campinas, SP

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The importance of this research relies on the quantitative evaluation of different daylighting devices, available in the international market, by means of acquiring the iIIuminance through models. This work was accomplished with objective of verifying the application of these systems, restricted to lateral iIIumination in national territory, if they would bring in fact some advantage for buildings, in the sense of optimizing the daylighting obtained in deep rooms, in Brazilian territory. The measurement has been made under real sky condition in the city of Campinas, SP. This thesis is composed of three stages. The first, brings a revision of the basic principies necessary for the study of the technologies used. Soon afterwards these daylighting devices in the international scene are presented, identifying their characteristics and the physical principies that determine its operation. In the second stage, by use of electronic spreadsheets, it was determined for each panel, the position and the most appropriate drawing for the latitude of Campinas for a North façade. In agreement with these specifications the panels were requested abroad from their manufacturers. In the third phase, with an iIIuminance measurement system, especially created for this task, the iIIuminance inside four prototypes were acquired, built in the State University of Campinas (UNICAMP), using the 12 different panels donated by universities and foreign companies. The daylinghting panels were coupled to the opening of the prototypes, located in the north façade. The illuminance obtained with each of these panels was registered from 8:00 to 18:00, from March to July. So that all of the panels were measured with the similar sun conditions so that every four days all of the panels were coupled to the prototypes and their iIIuminance measured during the day. The data are treated to get monthly average values of the illuminances, as a function of the depth of the environment, where the measurements were accomplished for clear, partially cloudy and cloudy days. From the comparison of these data we establish which of the studied devices can achieve a better performance if compared with a standard clear glass panel, and which can obtain a homogeneous iIIumination or greater iIIuminances along the deep of the room. The study showed that all the devices could easily be adapted to the luminous climate of Campinas, for the north façade, however each one of these devices has their limitations and advantages. Finally a new solution is suggested to reach an optimized exploitation of daylight in interior spaces, in agreement with the results obtained in the conclusion of this work

ASSUNTO(S)

janelas photometry iluminação natural daylight systems light in architecture fachadas fotometria windows medição de iluminancia daylight facade luz na arquitetura

ACESSO AO ARTIGO

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