Conditions and types of sky for simulations of daylighting with static sky
Brazilian standards recommend that the sky in daylighting simulations be the most representative of the location for summer and winter solstices, but the standards do not provide enough information to define them. However, the essential data for the definition of the sky are those obtained by equipm...
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| Main Authors: | , |
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| Format: | Online |
| Language: | por |
| Published: |
Universidade Estadual de Campinas
2020
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| Online Access: | https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8652766 |
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| Summary: | Brazilian standards recommend that the sky in daylighting simulations be the most representative of the location for summer and winter solstices, but the standards do not provide enough information to define them. However, the essential data for the definition of the sky are those obtained by equipment that measures global and diffuse solar radiation - existing in a few cities in Brazil. Thus, this article aims to define the sky conditions and the characteristic CIE skies of Brazilian capitals through a method applicable to the reality of the country. Initially, the capitals of the Center-South with data availability of daily and monthly sunshine hours from the Instituto Nacional de Meteorologia were selected, considering twenty years (1997-2016). The method, chosen to find the sky conditions, was the simplified one of Duffie and Beckman (2013) with adaptations from Ferreira and Souza (2006). For sky types, an additional step proposed by the authors was used, which divided the percentage of each sky condition obtained in the previous step by the amount of CIE skies with respective sky conditions. The results were ratified by comparison with cloudiness data from the same period. Thus, the research established a simplified classification of conditions and types of CIE sky for simulations with the static sky in daylighting programs for Cuiabá, Brasília, Belo Horizonte, Vitória, São Paulo, Curitiba, Florianópolis and Porto Alegre. Also, a methodology is presented for the selection of typical skies that could be replicated to other Brazilian cities. |
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