Publicação
Modelling ventilation phenomena in passive houses
| Resumo: | The present dissertation aims to combine the use of Computational Fluid Dynamics (CFD) software, to support the design of ventilation systems in passive houses. Sustainable construction is an increasing concern in the current construction market, finding in these houses a valid alternative in order to enhance energy savings in this sector. A passive house is known for achieving high levels of thermal comfort without consuming too much energy. In addition to an extremely rigorous thermal insulation, the use of highly efficient ventilation systems is one of the main factors in achieving such levels of comfort. Therefore, this dissertation intends to study the circulation of air associated to the mechanical ventilation system of a passive house in Portugal and consequent analysis of its thermal comfort. To achieve such purpose, a CFD commercial program called FLOW-3D® will be used. It was necessary to perform a validation of the program by comparing air velocities obtained numerically by the program and experimentally through the registration of air velocities in the studied passive house with the use of digital anemometers. Lastly, after the validation described above, an analysis over the thermal comfort of the building was performed, based on temperature registrations obtained experimentally and velocity values obtained from the numerical simulations. |
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| Autores principais: | Vidal, Fábio Duarte |
| Assunto: | Construção - Sustentabilidade Casas de habitação -Ventilação Controlo de temperatura |
| Ano: | 2015 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Aveiro |
| Idioma: | inglês |
| Origem: | RIA - Repositório Institucional da Universidade de Aveiro |
| Resumo: | The present dissertation aims to combine the use of Computational Fluid Dynamics (CFD) software, to support the design of ventilation systems in passive houses. Sustainable construction is an increasing concern in the current construction market, finding in these houses a valid alternative in order to enhance energy savings in this sector. A passive house is known for achieving high levels of thermal comfort without consuming too much energy. In addition to an extremely rigorous thermal insulation, the use of highly efficient ventilation systems is one of the main factors in achieving such levels of comfort. Therefore, this dissertation intends to study the circulation of air associated to the mechanical ventilation system of a passive house in Portugal and consequent analysis of its thermal comfort. To achieve such purpose, a CFD commercial program called FLOW-3D® will be used. It was necessary to perform a validation of the program by comparing air velocities obtained numerically by the program and experimentally through the registration of air velocities in the studied passive house with the use of digital anemometers. Lastly, after the validation described above, an analysis over the thermal comfort of the building was performed, based on temperature registrations obtained experimentally and velocity values obtained from the numerical simulations. |
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