Variables of influence on thermal performance of buildings under transient conditions.
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Date
2021
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Abstract
Residential buildings significantly increase electricity demand, especially in developing
countries. In this case, the requirements addressed by the standards can ensure the
climatic adequacy of the envelope, enhance thermal performance, and promote thermal
comfort conditions while reducing energy consumption. However, the criteria for
evaluating the thermal performance of a building’s envelope that is commonly adopted
in energy performance standards and codes have proved to be inefficient in hot climates.
The heat exchanges within buildings are dependent on solar radiation and ventilation. The
purpose of this article is to establish the variables with the greatest influence on the
thermal performance of naturally ventilated dwellings in hot climates (equatorial, tropical
and subtropical). For this investigation, a factorial design was adopted for sensitivity
analysis. The structure of the factorial experiment defined the simulations of four patterns
of single-family and multifamily residential buildings. We varied the thermophysical
properties of the external walls and roofs, the heat gain coefficient of the openings, and
natural ventilation. Brazil was adopted as a basis for climate analysis, including equatorial,
tropical and subtropical climates. The analyses were based on comfort hours in an
adaptive model and statistically evaluated using Analysis of Variance (ANOVA) tests. In
general, the absorption of the walls and cover, the thermal transmittance of the cover
and the natural ventilation were the variables of greatest influence on thermal comfort in
a hot climate.
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Keywords
Thermal performance, Naturally ventilated buildings, Standards, Experimento fatorial
Citation
FERREIRA, C. C.; SOUZA, H. A. de; CARLO. J. C. Variables of influence on thermal performance of buildings under transient conditions. PARC : Pesquisa em Arquitetura e Construção, Campinas, v. 12, artigo e021023, ago. 2021. Disponível em: <https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8661655>. Acesso em: 03 maio 2023.