Dynamic heat transfer through a hollow block wall in a naturally ventilated dwelling
DOI:
https://doi.org/10.32870/rvcs.v0i14.241Keywords:
hollow block, dynamic heat transfer, thermal bridge, frame path, in-cavity pathAbstract
This work presents an experimental study of the dynamic heat transfer through a hollow concrete block envelope wall in a hot-dry climate in a non-air-conditioned dwelling. The solid part of the block, which acts as a frame for heat trans- fer, is typically considered a thermal bridge. The study aims to elucidate if this frame path is the main path for heat transfer in hot-dry climatic outdoor conditions and non-air-conditioned buildings. The study is based on measurements of the surface temperature at the center of the frame path and the center of the in-cavity path on both outdoor and indoor surfaces of the envelope wall. The results show that the ratio between heat transferred by the cavity path and the solid path varies throughout the day. During the night, the in-cavity path transfers almost the same heat as the frame path; during the day, the in-cavity path transfers less heat than the transferred by the frame path, while for short periods, this last proportion is inverted. Therefore, it is concluded that the frame path cannot be automatically con- sidered a thermal bridge, nor can the in-cavity path be considered the low heat transfer portion, as this proportion varies throughout the day. This study provides a dynamic analysis of heat transfer through a widely used material in low-income housing in Mexico to improve our understanding of the phenomenon.Metrics
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