Simulação numérica do desempenho térmico de alvenaria construída com blocos de concreto
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2022-01-31
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Universidade Federal de Goiás
Resumo
The concern with environmental sustainability applied to civil construction,
especially given the need for non-depletion of natural resources and energy
efficiency, demonstrates the importance of thermal performance in buildings in
accordance with performance standards, which aims to verify compliance with
criteria minimums concerning thermophysical characteristics for closure
systems. The new revision NBR 15575 (ABNT, 2021) establishes criteria for
evaluating the thermal performance of the building and the results allow for an
adjustment in the planning and preparation of projects, changing the building
components or the architectural model of the building in order to seek better
thermal performance for the building. The objective of the work was to improve
the structural concrete block from the standard unit of the family 39, aiming at
improving the thermal performance of the building through its specification.
After studies of form and function, the prototype was named as DT 39 Block.
As a methodology, an exploratory research was carried out. The evaluation was
performed by calculating the thermal transmittance and thermal capacity of the
building envelope and compression tests of the unit and prism. Computational
simulations were performed using the EnergyPlus program, which allowed
testing the weather conditions on the building and determining its thermal
behavior before the insertion of the new DT 39 Block in different design
configurations. The results obtained were compared and analyzed according to
the requirements of NBR 15575-1 (ABNT, 2021), which made it possible to
generate comparative graphs between the buildings simulated with the
standard block and with the new developed block (DT 39). Through the results
of the simulations, it was possible to evaluate that with the modification in the
geometry of the concrete block it was possible to improve the thermal
performance of the simulated buildings, that is, with the specification of the new
block in the building, whether applied to a wall or to all walls of the building, it
was possible to change their thermal performance level, leaving the minimum
level of thermal performance, to the intermediate level. In other words, when
both buildings were inserted in the DT 39 Block, they improved the comfort
percentage of the simulated buildings and reduced their thermal load.
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RODRIGUES, M. G. Simulação numérica do desempenho térmico de alvenaria construída com blocos de concreto. 2022. 97 f. Dissertação (Mestrado em Projeto e Cidade) - Universidade Federal de Goiás, Goiânia, 2022.