DECAT - Departamento de Controle e Automação
URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/490
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Resultados da Pesquisa
Item Simulação termoenergética e lumínica de fachadas com brises no clima tropical.(2023) Dias, Luma de Souza; Souza, Henor Artur de; Gomes, Adriano Pinto; Caetano, Lucas Fonseca; Camargos, Bruno Henrique Lourenço; Tribess, ArlindoO uso da luz natural em edificações é uma importante estratégia de projeto pois minimiza o consumo de energia com iluminação elétrica e proporciona maior qualidade visual para seus usuários. Porém, essa estratégia pode resultar em ganhos térmicos excessivos e ofuscamento, causando desconforto térmico em ambientes de trabalho. No intuito de buscar uma combinação entre qualidade visual e bom desempenho termoenergético e lumínico, analisa-se nesse estudo a influência do tipo de brise-soleil e tipo de vidro, aplicados a uma edificação comercial com fachada envidraçada, localizada em regiões de clima tropical. Incluise na análise a edificação sem o uso do brise-soleil, como referência. São realizadas simulações computacionais com os programas Daysim e EnergyPlus considerandose a fachada oeste da edificação. Ao considerar o parâmetro tipo de vidro, os modelos que apresentam melhor comportamento são aqueles com vidro comum. Comparando-se os resultados entre os tipos de brises percebe-se que os modelos com brise vertical possuem valores mais elevados de taxa de radiação solar do que os modelos com brise horizontal, trazendo benefícios de maior luz natural ao ambiente. Os resultados, considerando-se as horas de conforto do usuário, indicam que o modelo de brise horizontal com vidro laminado na cor verde apresenta-se como o mais adequado, visto que possui o menor consumo de energia e mais horas de conforto. Ressalta-se, como contribuição do presente trabalho, a obtenção de modelos de brises mais adequados para projetos de brises aplicados em fachadas envidraçadas em regiões de clima tropical.Item Proposal of stainless steel roof structure and tiles for gymnasiums.(2022) Oliveira, Géferson Diogo de; Souza, Henor Artur de; Ribas, Rovadávia Aline de Jesus; Caetano, Lucas FonsecaThis work proposed an architectural alternative project of a stainless steel roof structure that uses roof tiles also in stainless steel with emphasis on roofs for multi-sport gymnasiums. In the development of the work, two existing multi-sports gymnasiums are taken as a reference, but with ASTM (American Society for Testing and Materials) A36 steel roof structure. The proposed cover system uses cables and light gauge profiles, in commercial stainless steel, which reduces the weight and of course the final price of the roof structure. A structure that presents technical feasibility is obtained and analyzed by checking its behavior with respect to the efforts and displacements generated by the combinations of the acting loads, following the safety recommendations of the applicable standard. It is verified that using the stainless steel structure proposed in this work would cost 42% of the reference structure if this were in AISI (American Iron and Steel Institute) 304 stainless steel. And this cost tends to be minimized due to greater durability and consequent reduction in maintenance costs of this type of steel.Item Effect of the exposed steel structure on the thermal performance of buildings.(2022) Caetano, Lucas Fonseca; Souza, Henor Artur de; Gomes, Adriano PintoDepending on the building typology, the architectural characteristics and the materials used in a building, its interaction with the local climate can produce negative impacts on the energy consumption of the buildings. The presence of steel in the building structure characterizes a reduction in the thermal resistance of the building envelope, which causes an increase in energy costs for environment heating or cooling. In this context, simulation of the thermal performance of buildings using computer programs has generated several constructive advantages for the establishment of energy-efficient buildings. This paper’s main purpose is to evaluate the influence of the exposed steel structure area on the thermal performance of naturally ventilated and artificially conditioned environments using computational simulations. The results showed that in the numerical simulation of naturally ventilated environments, there were increases of about 3.0% and 2.0% in the environment indoor temperatures during the winter and summer periods, respectively. Considering the winter period, the heat losses through the steel structure were up to 4.1 times larger concerning those made for walls without steel, and the heat gains about 4.2 times higher in the summer period. The effects of thermal bridging were more evident in the evaluation of artificially conditioned environments. There was a maximum increase of 4.8% in the environment total cooling thermal load and, as a consequence, a maximum variation of 4.9% in the building energy consumption, evidencing that the larger the exposed steel area in the building closure system, the larger the effect caused by this thermal bridge.