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Otimização energética do edifício C8 FCUL
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A exigência dos níveis de conforto térmico e da própria qualidade do ar no interior em edifícios tem aumentado bastante nos últimos anos. Como consequência, a energia consumida por sistemas de climatização representa aproximadamente metade de toda a energia faturada em edifícios. Nos edifícios de serviços há especialmente um desinteresse pela poupança de energia, com impactos substanciais na fatura energética e no ambiente. A eficiência energética surge como um meio importante para mitigar os prejuízos económicos e ambientais provocados pela grande quantidade de energia solicitada pelos sistemas climatização. O presente trabalho consiste no estudo de duas medidas de eficiência energética e os seus impactos no conforto térmico, qualidade do ar interior e consumo de energia final. Será feita uma comparação entre o funcionamento atual do sistema de aquecimento, arrefecimento e ar condicionado (AVAC) e após a aplicação das medidas de racionalização do consumo de energia (MRCE), com o auxilio de um software de simulação dinâmica computacional, o EnergyPlus. Os resultados obtidos neste trabalho mostram que a ventilação natural é uma forma viável de promover o conforto térmico dos ocupantes e a qualidade do ar interior, possibilitando uma redução bastante significativa do consumo de energia elétrica para climatização. As MRCE representam um investimento total de 18250 euros e um retorno de mais de 16500 euros por ano. O payback esperado é de 1,1 anos, que representa um período de retorno do investimento curto e viabiliza economicamente o projeto de implementação das medidas de eficiência energética.
The requirement of thermal comfort levels and the interior air quality in buildings has increased greatly in recent years. As a consequence, the energy consumed by heating, cooling and air conditioning systems (HVAC) represents approximately half of all energy consumed in buildings. People in service buildings have shown especially disinterested by energy saving, which causes an increase of the energy consumption, with impacts on the environment. In this context, energy efficiency appears as an important concept to minimize the economic and environmental damages caused by the large amount of energy requested by climatization systems. The present work consists of a study of two measures of energy efficiency and its impacts on thermal comfort, air quality and final energy consumption. It will comprehend a comparison between the actual and forward operation of HVAC system by the application of the energy efficiency measures, with the help of a computational dynamical simulation software, EnergyPlus. The results obtained in this work showed that the natural ventilation is a viable way to promote the thermal comfort of the occupants and the interior air quality, allowing a significant reduction of the electric energy consumption for the air conditioning. The application of the energy efficiency measures represents an investment of 18250€ and a return of more than 16500€ per year. This project expects a payback of 1.1 years, which represents a short period of return investment and it means that the implement of energy efficiency measures are economically feasible.
The requirement of thermal comfort levels and the interior air quality in buildings has increased greatly in recent years. As a consequence, the energy consumed by heating, cooling and air conditioning systems (HVAC) represents approximately half of all energy consumed in buildings. People in service buildings have shown especially disinterested by energy saving, which causes an increase of the energy consumption, with impacts on the environment. In this context, energy efficiency appears as an important concept to minimize the economic and environmental damages caused by the large amount of energy requested by climatization systems. The present work consists of a study of two measures of energy efficiency and its impacts on thermal comfort, air quality and final energy consumption. It will comprehend a comparison between the actual and forward operation of HVAC system by the application of the energy efficiency measures, with the help of a computational dynamical simulation software, EnergyPlus. The results obtained in this work showed that the natural ventilation is a viable way to promote the thermal comfort of the occupants and the interior air quality, allowing a significant reduction of the electric energy consumption for the air conditioning. The application of the energy efficiency measures represents an investment of 18250€ and a return of more than 16500€ per year. This project expects a payback of 1.1 years, which represents a short period of return investment and it means that the implement of energy efficiency measures are economically feasible.
Descrição
Tese de mestrado integrado, Engenharia da Energia e do Ambiente, Universidade de Lisboa, Faculdade de Ciências, 2017
Palavras-chave
Conforto térmico Qualidade do ar Eficiência energética Consumo de energia AVAC Simulação dinâmica EnergyPlus Teses de mestrado - 2017