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| Author(s): |
Bianca Carla Dantas de Araujo
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Arquitetura e Urbanismo (FAU/SBI) |
| Defense date: | 2010-03-15 |
| Examining board members: |
Sylvio Reynaldo Bistafa;
Marcia Peinado Alucci;
Stelamaris Rolla Bertoli;
Milton Vilhena Granado Junior;
Paulo Sergio Scarazzato
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| Advisor: | Sylvio Reynaldo Bistafa |
| Abstract | |
The environmental comfort requires the search for design alternatives that promote less energy impact on architecture. In places with hot and humid climates, natural ventilation is one of design strategies; into this vision, the hollow elements (cobogós or combogós, as popularly known in northeastern Brazil) act as architectural components that provide permanent natural ventilation, sun protection and natural lighting, and ease of manufacture. Despite the secular use of hollow elements, they lost space in contemporary architectural production, and there are few surveys with a view to enhancing its potential as an alternative passive design. However, there is awareness of the problems related noise that comes from its use in natural ventilation, such as commitment in the isolation of external noise and privacy between environments. In this work, for these reasons, the proposal is to develop an element hollow sound, aiming to use it in alleviating the problem of the dichotomy between the thermal and acoustic aspects involved. The performance of sound insulation in situ of the elements created was assessed based on the ISO 140-5, was also studied the performance of natural ventilation through computer simulations, using methods of computational fluid dynamics - CFD. Were developed 4 types of blocks, all studied at different mounts on a wall like facade, according to 3 conditions: closed and open (with and without sound absorption material). The results revealed how likely is the transmission of noise from the vent, however, satisfactory sound insulation were obtained, especially in one of the mounts (block type 3, box), which presented a performance similar to a closed block with index Noise Reduction Global Standard (Dntw) of 27 dB. This assembly has an open area ratio of satisfactory to promote natural ventilation in an environment (confirmed by the comparative performance of simulated ventilation of the blocks), while maintaining sound insulation than the other (few) elements in the market, with the objective to promote natural ventilation and reduce noise transmission to achieve good performance (AU) | |