Estimativa da condensação em edificações unifamiliares em território brasileiro: simulação higrotérmica computacional

Abstract

Superficial condensation is a fundamental parameter for building performance analysis and influences the habitability and durability requirements for buildings. This study evaluates the surface condensation, absorption, and hygrothermal performance for Brazilian climatic conditions, in residential buildings. A proposal was adopted in the standards EN ISO 13788:2012, EN 15026:2007 and ASHRAE 160:2009, proposing an adaptation for the Brazilian characteristics, using hygrothermal simulation and verifying the results of some typical construction characteristics. Through simulation with the WUFI® Plus software, four walls systems and four ceiling systems were analyzed, for eight Brazilian bioclimatic zones, using representative cities: Curitiba/PR (ZB1), São Lourenço/MG (ZB2), São Paulo/SP (ZB3), Brasília/DF (ZB4), Vitória da Conquista/BA (ZB5), Campo Grande/MS (ZB6), Cuiabá/MT (ZB7) e Manaus/AM (ZB8). The results indicate that natural ventilation and external climate increases internal moisture in all bioclimatic zones, except for ZB8. Regarding the types of housing units analyzed, those with the lowest volume were those with the highest surface condensation and internal moisture. The physical-chemical properties of the construction systems had a great influence on surface condensation and not only the thermal resistance, with a small impact on the user’s thermal comfort. The impact on hygrometer performance had a great influence of the thermal properties and climates and a minor influence of the moisture. This study contributes to the discussion about surface condensation and the impact of moisture on buildings, with different volumes, construction systems and Brazilian climates.