Desenvolvimento de estrutura para purificação de água potável, através da irradiação de UV com lâmpadas fluorescentes especiais

• Ano de defesa: 2014
• Autor(a) principal: De Oro Arenas, Luis Armando [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Filtros e filtração; Agua - Purificação - Filtração; Lampadas fluorescentes; Radiação ultravioleta; Reatores eletricos; Modelos matematicos; Fator de potencia; Filters and filtration
• Link de acesso: http://hdl.handle.net/11449/123109; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/23-04-2015/000823144.pdf

In this research it was developed a methodology for the design of special fluorescent lamps electronic ballasts applied to water purifiers, through the use of UV radiation. The main contribution of this work it is related to the development of a design methodology to fit the parameter known as UV dose. This parameter defines the amount of energy as UV light to which the pathogenic microorganisms present in water must be exposed to inhibit their metabolic and reproductive functions. In this context, a purifying drinking water structure was designed and implemented, applying the TURF method. This method proposes to calculate separately, the particle exposition time and the amount of UV radiation produced by the lamp, and in a third step, calculate theoretically the UV dose. Thus, the related time was determined with the hydraulic structure model using the software SolidWorks, and through the use of MSSS mathematical model to obtain the UV radiation provided by the purifier. Whereas the behavior of the used UV lamps is similar to conventional fluorescent lamps, they are modeled applying a Fourth Degree model. Hence, an electronic ballast that guaranties a controlled preheating process of the lamp electrodes before the ignition and sets the nominal power point on the steady state, was developed. In addition, the ballast incorporates an input rectifier stage using a Flyback converter with active power factor correction (PFC), in discontinuous conduction mode, with universal input voltage range (90V RMS - 240 V RMS ), attending the limits imposed by IEC 61000-3-2 standard, for class C devices. Finally, it is highlighted that, with the proposed methodology for adjusting the UV dose, could ensure the development of a design that allows full compliance with NSF/ANSI Standard 55: Classes A and B, for the proposed drinking water purifier