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Publication
Climatização de espaços ocupados através de energia produzida por metodos naturais
| Name: | Description: | Size: | Format: | |
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| 1.44 MB | Adobe PDF |
Advisor(s)
Abstract(s)
No panorama das alterações climáticas muitas estratégias são utilizadas para reduzir o consumo de energia dos edifícios. As principais convergências no setor da construção são a nível arquitetónico e de conforto dos ambientes interiores, sabendo que a energia é um grande fator a ter em conta. Atualmente os novos edifícios possuem grandes fachadas, muitas delas envidraçadas, que geram quantidades de energia sob forma de calor. Para fazer face a estes problemas foram desenvolvidos sistema de fachadas duplas ventiladas e sistemas de sombreamento como o caso de lamelas. Este sistema permite de forma eficiente e com baixos custos energéticos reduzir a necessidade de climatização dos edifícios. Este projeto visa estudar o aproveitamento do calor gerado pelos envidraçados para climatização dos espaços interior com recurso a ventilação forçada. Para tal será necessário estudar os comportamentos térmicos das 3 fachadas duplas ventiladas (DSF) instaladas na camara experimental com recurso a 3 programas de simulação dinâmica, utilizados na modelação de escoamentos (CFD), na resposta térmica humana (HTR) e na resposta térmica de edifícios (BTR). A partir destes modelos resultaram duas simulações, uma para aplicação da mistura perfeita do ar dentro da camara e a outra para uma vertente mais prática utilizando jatos descendentes. Os resultados destas simulações foram bastante satisfatórios, comprovando que os sistemas de climatização por métodos naturais podem ser o futuro na climatização e tornar os edifícios termicamente mais eficientes com custos de produção de energia muito reduzidos.
In the climate change perspective, there are many different strategies being used in order to reduce energy consumption of buildings. The main convergences in the construction industry are at an architectural level and interior environment comfort, knowing that energy is now a factor to keep in mind. Nowadays, new buildings are built with great facades, many of them in glass, that generate great amounts of energy in the form of heat. To combat these problems new techniques were developed, like double skin facades and shading systems like venetian blinds. These systems allow the reduction of the need to climatize the buildings in an efficient and low energy cost way. This project aims to study the exploitation of the heat generated by glass to use on climatization of interior spaces using forced ventilation. To do so, a study of the three double skin façades (DSF) and the experimental chamber’s thermal behavior will be necessary, using three dynamic simulation programs, used for flow modeling (CFD), human thermal response (HTR) and building thermal response (BTR). From these models, two simulations were created, one for the application of the perfect mixture of air inside the chamber and another more practical one that uses downward streams. These simulations got very satisfying results, proving that climatization systems that use natural methods can be the future and can make buildings thermally more efficient and with much lower energy costs.
In the climate change perspective, there are many different strategies being used in order to reduce energy consumption of buildings. The main convergences in the construction industry are at an architectural level and interior environment comfort, knowing that energy is now a factor to keep in mind. Nowadays, new buildings are built with great facades, many of them in glass, that generate great amounts of energy in the form of heat. To combat these problems new techniques were developed, like double skin facades and shading systems like venetian blinds. These systems allow the reduction of the need to climatize the buildings in an efficient and low energy cost way. This project aims to study the exploitation of the heat generated by glass to use on climatization of interior spaces using forced ventilation. To do so, a study of the three double skin façades (DSF) and the experimental chamber’s thermal behavior will be necessary, using three dynamic simulation programs, used for flow modeling (CFD), human thermal response (HTR) and building thermal response (BTR). From these models, two simulations were created, one for the application of the perfect mixture of air inside the chamber and another more practical one that uses downward streams. These simulations got very satisfying results, proving that climatization systems that use natural methods can be the future and can make buildings thermally more efficient and with much lower energy costs.
Description
Keywords
Fachadas duplas ventiladas (dsf) Ventilação forçada Consumo de energia Sistema de sombreamento Simulação dinâmica CFD HTR BTR Conforto térmico ADI PMV PPD