Controlador fuzzy para otimização de sistemas de aquecimento de agua com coletores solares / Fyzzy controller for optimization of water heating systems with solar collectors

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Although significant savings in electrical energy are achieved with commercially available solar water heaters, they do not present a good performance in days that the radiation is not good, because the boiler is filled with cold water whenever the hot water is used. In this work, a new solar heating system, which minimizes the use of electrical energy, is proposed. The proposed system uses a fuzzy controller that analyzes the intensity of solar radiation, the temperature of the water inside the boiler and the volume of water inside the boiler, to actuate on a On/Off valve which controls the boiler s input of cold water. Two solar heating systems were modeled: a conventional system and the new proposed system with the fuzzy controller; and their efficiencies were compared using computer simulations. The obtained results show that the proposed system with the fuzzy controller presents a much higher performance when compared to the traditional system. Simulation results indicate that for a three winter days period, with low intensity solar radiation, the conventional system consumed 10.08 kwh of electrical energy while the proposed system needed only 1.86 kwh to achieve the same performance

ASSUNTO(S)

coletores solares solar collectors aquecedores solares de agua aquecimento solar solar heating solar water heaters logica difusa fyzzy logic

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