Keywords
Underground construction
Buried construction.
How to Cite
Abstract
A vernacular housing alternative widely used by indigenous groups in southern Brazil is based on burying the more significant part of the dwellings and covering it with a vegetated roof. The present study aims to verify the thermal performance of buried and semi-buried test cells when compared to a ground control cell as a bioclimatic strategy. The method is based on the comparison of temperature variations measured inside test cells concerning external and soil temperature measured in Curitiba, PR, during the winter period. The test cells were made on a reduced scale, all with the same dimensions and material specifications. The performance of each test cell was evaluated through the analysis of thermal fluctuations, time lag, differences in temperature, and amplitudes of surface sensors and comfort levels. Data analysis revealed that the buried test cell presented lower thermal amplitude and longer time lag. Regarding the sum of degrees-hours outside the comfort temperature range, the buried test cell obtained the best performance during the winter period. It was also possible to verify that a greater surface area in contact with the soil increases the thermal performance.
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