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Abstract(s)
A necessidade de produção de todo o tipo de plantações em elevadas quantidades e ao longo
de todo o ano faz do setor da agricultura um dos principais consumidores energéticos. A
otimização deste consumo é essencial para garantir a sustentabilidade do mesmo. A
implementação de estufas é uma estratégia que permite garantir as necessidades de produção,
assim como possui grande potencial para otimização do processo. Nesta dissertação foram
estudadas estas estruturas com recurso à simulação computacional. O primeiro passo foi a
construção do modelo computacional, seguido da sua validação através da comparação com
dados experimentais já existentes, e por fim uma série de estudos de caso foram realizados
para avaliar os efeitos de diferentes parâmetros construtivos e operativos no comportamento
térmico da estufa. Os resultados obtidos mostraram que a utilização de envidraçados de várias
camadas e a variação da taxa de renovação do ar interior produziram os resultados com maior
impacto. Estas técnicas permitem reduzir significativamente o consumo energético destas
estruturas, promovendo a sua sustentabilidade.
The need for the production of all kinds of crops in high quantities and during the entire year makes the agricultural sector one of the main energy consumers. The optimization of this consumption is essential to guarantee the sustainability of it. The implementation of greenhouses is a strategy that allows assuring the production needs, as well as possess large optimization potential of the process. In this dissertation the structures were studied by the means of computational simulation. The first step was the building of the computational model, followed by its validation through comparison with already-existing experimental data, and lastly a series of case studies were developed as to evaluate the effects of different constructive and operative parameters on the greenhouse's thermal behavior. The results obtained showed that the utilization of multi-layered glazing and variation of inside air exchange rates produced the results with the biggest impact. These techniques allow significant reduction of the energy consumption of these structures, promoting its sustainability.
The need for the production of all kinds of crops in high quantities and during the entire year makes the agricultural sector one of the main energy consumers. The optimization of this consumption is essential to guarantee the sustainability of it. The implementation of greenhouses is a strategy that allows assuring the production needs, as well as possess large optimization potential of the process. In this dissertation the structures were studied by the means of computational simulation. The first step was the building of the computational model, followed by its validation through comparison with already-existing experimental data, and lastly a series of case studies were developed as to evaluate the effects of different constructive and operative parameters on the greenhouse's thermal behavior. The results obtained showed that the utilization of multi-layered glazing and variation of inside air exchange rates produced the results with the biggest impact. These techniques allow significant reduction of the energy consumption of these structures, promoting its sustainability.
Description
Keywords
Comportamento Térmico Designbuilder Eficiência Energética Estufa Modelação Numérica