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Abstract(s)
O aproveitamento da radiação solar representa um recurso energético extremamente benéfico, quer no âmbito energético, quer no ambiental, contribuindo para a redução das emissões de gases nocivos para a atmosfera.
Portugal apresenta uma radiação solar total média anual bastante elevada, colocando-se entre um dos países que apresentam melhores potencialidades para o aproveitamento da energia solar.
A torre solar consiste numa estufa com uma determinada extensão com uma chaminé no seu centro e o seu funcionamento baseia-se no aquecimento do ar que circula por baixo da estufa, sendo expelido pela chaminé.
Nesta tese é abordado o tema da torre solar e os princípios físicos inerentes ao seu funcionamento.
Foi estudado e descrito o método de cálculo de diversos parâmetros e resultados associados ao funcionamento da torre solar.
Elaborou-se uma folha de cálculo para obtenção dos valores de simulações de torres com diversas dimensões, tecendo-se conclusões quanto aos resultados e às variações dos mesmos, consoante as alterações de dimensão dos elementos que a constituem.
Foram descritos os vários elementos que constituem uma torre solar, bem como as suas características e tipologias.
Efectuou-se um estudo com aplicação a um caso real, para se tecer algumas conclusões e comentários relativamente à viabilidade de uma torre solar para a situação em causa.
Por fim, com base em todo o trabalho desenvolvido e abordado, foi possível tecer-se algumas conclusões quanto à viabilidade das torres solares.
The use of solar radiation energy resource represents an extremely benefit, both in the energy sector, both in the environment, contributing to reducing emissions of harmful gases into the atmosphere. Portugal has an average annual total solar radiation quite high, placing it among one of the countries with the best potential for solar energy use. The solar tower consists on a solar greenhouse with a certain length with a chimney at its center and its operation is based on heating the air flowing underneath thegreenhouse, being expelled through the chimney. This study addresses the topic of solar tower and physical principles inherent in its operation. It has been studied and described the calculation method and results of various parameters associated with the operation of the solar tower. It has been developed a calc sheet to obtain the values of simulations with different dimensions of towers, weaving to conclusions about the results and variations thereof,depending on the variations in the size of its constituent elements. It has been described the various elements that make up a solar tower, as well as their characteristics and types. Conducted a study with application to a real case, to make some conclusions andcomments on the feasibility of a solar tower to the situation. Finally, based on all the work and approach, it was possible to draw some conclusionsabout the viability of solar towers.
The use of solar radiation energy resource represents an extremely benefit, both in the energy sector, both in the environment, contributing to reducing emissions of harmful gases into the atmosphere. Portugal has an average annual total solar radiation quite high, placing it among one of the countries with the best potential for solar energy use. The solar tower consists on a solar greenhouse with a certain length with a chimney at its center and its operation is based on heating the air flowing underneath thegreenhouse, being expelled through the chimney. This study addresses the topic of solar tower and physical principles inherent in its operation. It has been studied and described the calculation method and results of various parameters associated with the operation of the solar tower. It has been developed a calc sheet to obtain the values of simulations with different dimensions of towers, weaving to conclusions about the results and variations thereof,depending on the variations in the size of its constituent elements. It has been described the various elements that make up a solar tower, as well as their characteristics and types. Conducted a study with application to a real case, to make some conclusions andcomments on the feasibility of a solar tower to the situation. Finally, based on all the work and approach, it was possible to draw some conclusionsabout the viability of solar towers.
Description
Keywords
Radiação solar Energia solar Solar energy Solar radiation energy
Citation
Santos, Tiago Luís Correia dos - Torre solar: estudo do rendimento e viabilidade de centrais térmicas solares para produção de energia eléctrica de pequena e média dimensão. Lisboa: Instituto Superior de Engenharia de Lisboa, 2011. Dissertação de mestrado.