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Previous issue date: 2014-12-02 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / A cidade do Natal-RN tem grande disponibilidade de luz natural, entretanto seu uso
n?o ? sistematicamente explorado na arquitetura escolar. Neste contexto, esta pesquisa se
prop?e a determinar procedimentos para a an?lise de desempenho luminoso para projetos de
escolas em Natal-RN. O m?todo de an?lise ? dividido em Fator de C?u Vis?vel (FCV),
simula??o e compara??o dos resultados. A flutua??o do comportamento anual da luz
determinou a ado??o da simula??o din?mica como procedimento de obten??o de dados. A
modelagem foi executada no programa SketchUp, a simula??o foi realizada no programa
Daysim e a tabula??o dos dados foi feita por meio de planilhas eletr?nicas no Excel. Os
modelos analisados s?o salas de aula de dimens?es 7,20m x 7,20m, com janelas com
Percentual de Abertura de Fachada (PAF) de 20%, 40% e 50%, e com dispositivos de
sombreamento como marquise, marquise inclinada, marquise com prote??o lateral, marquise
com vista frontal, marquise simples com tr?s brises horizontais, marquise dupla, marquise
dupla com tr?s brises horizontais, al?m do uso da prateleira de luz nos modelos com PAF de
40% e 50%. Os dados foram tratados em planilhas eletr?nicas, com duas faixas de UDI: entre
300lux e 2000lux e entre 300lux e 3000lux. A simula??o foi realizada com o arquivo clim?tico
do ano de 2009 para a cidade de Natal-RN. As sa?das gr?ficas s?o curvas de ilumin?ncia,
isolinhas de UDI entre 300lux e 2000lux e tabelas com o ?ndice de ocorr?ncias de ofuscamento
paro UDI entre 300lux e 3000lux. O melhor desempenho de UDI300-2000lux foi evidenciado para:
Fase 1 (modelos com PAF de 20%), Fase 2 (modelos com PAF 40% e 50% com o uso da
prateleira de luz). O melhor desempenho de UDI300-3000lux foi evidenciado para Fase 1 (PAF
20% e 40% com a prateleira de luz), Fase 2 (PAF 40% e 50% com prateleira de luz). Os
resultados comprovam que a obten??o de uma ilumina??o natural com qualidade depende
principalmente da efic?cia do sistema de sombreamento para evitar o ofuscamento, principal
causa encontrada de desconforto luminoso. Recomenda??es bioclim?ticas de aberturas
grandes e sombreadas parcialmente (com incid?ncia de radia??o solar direta na abertura)
resultaram em ilumin?ncias muito acima do crit?rio de aceita??o. O aumento da efici?ncia do
sombreamento (de 73% a 91%) em aberturas de tamanho m?dio (PAF?s de 40% e 50%)
reduziu ou eliminou o ofuscamento sem comprometer a profundidade de v?o iluminado (de
7,20m). Foi determinada a zona passiva para os modelos que tiveram um desempenho
luminoso aceit?vel, possibilitando o c?lculo da rela??o entre profundidade de da luz natural e
a altura de verga de janela para os diferentes tamanhos de aberturas. A raz?o variou entre
1,54 a 2,57 para o PAF de 20%, 40% e 50% respectivamente. Houve uma redu??o ou
elimina??o do ofuscamento na zona passiva, em rela??o ao uso da prateleira de luz / The city of Natal has a significant daylight availability, although it use isn?t systematically
explored in schools architecture. In this context, this research aims to determine procedures
for the analysis of the daylight performance in school design in Natal-RN. The method of
analysis is divided in Visible Sky Factor (VSF), simulating and analyzing the results. The
annual variation of the daylight behavior requires the adoption of dynamic simulation as data
procedure. The classrooms were modelled in SketchUp, simulated in Daysim program and the
results were assessed by means of spreadsheets in Microsoft Excel. The classrooms
dimensions are 7.20mx 7.20m, with windows-to-wall-ratio (WWR) of 20%, 40% and 50%, and
with different shading devices, such as standard horizontal overhang, sloped overhang,
standard horizontal overhang with side view protection, standard horizontal overhang with a
dropped edge, standard horizontal overhang with three horizontal louvers, double standard
horizontal overhang, double standard horizontal overhang with three horizontal louvers, plus
the use of shelf light in half the models with WWR of 40% and 50%. The data was organized
in spreadsheets, with two intervals of UDI: between 300lux and 2000 lux and between 300lux
and 3000lux. The simulation was performed with the weather file of 2009 to the city of NatalRN.
The graphical outputs are illuminance curves, isolines of UDI among 300lux and 2000 lux
and tables with index of occurrences of glare and to an UDI among 300lux 3000lux. The best
UDI300-2000lux performance was evidenced to: Phase 1 (models with WWR of 20%), Phase 2
(models with WWR of 40% and 50% with light shelf). The best UDI300-3000lux performance was
evidenced to: Phase 1 (models with WWR of 20% and 40% with light shelf) and Phase 2
(models with WWR of 40% and 50% with light shelf). The outputs prove that the daylight quality
mainly depends on the shading system efficacy to avoid the glare occurrence, which
determines the daylight discomfort. The bioclimatic recommendations of big openings with
partial shading (with an opening with direct sunlight) resulted in illuminances level higher than
the acceptable upper threshold. The improvement of the shading system percentage (from
73% to 91%) in medium-size of openings (WWR 40% and 50%) reduced or eliminate the glare
occurrence without compromising the daylight zone depth (7.20m). The passive zone was
determined for classrooms with satisfactory daylight performance, it was calculated the
daylight zone depth rule-of-thumb with the ratio between daylight zone depth and the height of
the window for different size of openings. The ratio ranged from 1.54 to 2.57 for WWR of 20%,
40% and 50% respectively. There was a reduction or elimination of glare in the passive area
with light shelf, or with awning window shading.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19678 |
| Date | 02 December 2014 |
| Creators | Carvalho, Juliana Portela Vilar de |
| Contributors | 75042142991, http://lattes.cnpq.br/9012296636400514, Souza, Roberta Vieira Gon?alves de, 70888167687, http://lattes.cnpq.br/8006209271320989, Goulart, Solange Virginia Galarca, 46912517072, http://lattes.cnpq.br/3736189855910739, Pedrini, Aldomar |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ARQUITETURA E URBANISMO, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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