Abstract:In the search for alternatives to reduce the consumption of electric energy, the possibility of using natural light for lighting through TDD (tubular daylight devices) or TDGS (tubular daylight guidance systems) appears. These natural luminaires are used in rooms where you want to save electricity and enjoy the benefits of natural light. The present work proposes the construction of a tubular system for the conduction of natural light that replaces aluminum with silver (currently marketed by several companies) by polymer metallized with aluminum, offering a low cost. The polymer acrylonitrile butadiene styrene (ABS), coated with aluminum by physical vapor deposition (ionization), was evaluated for some tests to verify characteristics of the structure and the metallized surface. After the tests, the construction of the reflective tube was performed and validated in a real scale of application. The results proved the technical viability of the proposed tube construction for the realization of direct sunlight for illumination using polymeric material. Although it has produced 35% less than the reference tube, it can be marketed at an estimated cost of 50% less.
This work has the objective of developing a methodology for the evaluation of indoor natural lighting systems, which, with speed and practicality, provides from real conditions of use a reliable result about the quality and performance of the proposed system. The methodology is based on the construction of two real-size test environments, which will be subjected to a natural light system through reflexive tubes made from recycled material, and to a commercial system already certified and consolidated, creating the possibility of comparison. Furthermore, the data acquired in the test environments will be examined in light of the values of solar radiation obtained from a digital meteorological station, such that it is possible to stipulate the lighting capacity of the systems at different times of the year.
This present paper is a study of the possibility of replacing conventional indoor light bulbs, by the daylighting trough domes and reflective tubes, which respectively capture and diffuse the sunlight to the interior environment. Base on collected data trough in a weather station, it is made a daily data collection and realized a projection of the sunlight which will focus on purpose study's system, according to the variations over the analyzed months. Wherefore, it is estimated the amount of replaced light bulbs and, therefore your economy. This kind of technology will allow the illumination will happen in a healthy and comfortable way.
This in situ study presents an analysis of the wear of mobile contacts of switching in an automatic line voltage regulator, regarding the surface wear of the contacts. It is interesting to analyze the contacts of this equipment due to the friction and wear generated during the contact change, in order to predict and contain mechanical operation failures. The contacts were evaluated for mass loss, profilometry, and analysis in a scanning electron microscope, after remaining in operation in the regulator for about one year and switching the contacts almost 2500 times. This study aims to evaluate the performance of the contacts, in terms of surface wear, correlating the number of switching and the effects generated on the contacts in terms of loss of mass and surface damage. With the results obtained, it is possible to conclude that with each switching maneuver the mobile contact loses about 0.002895% of its initial mass. In addition, there was a change in the topography of the sample, associated with its wear, suggesting that the wear is different along the surface of the regulator contacts studied.
ResumoEste trabalho busca desenvolver um instrumento para diagnosticar a expectativa de sucesso da micro e pequena empresa brasileira. Utiliza-se o enfoque PNQ (Prêmio Nacional da Qualidade) como referência. Primeiramente, criou-se um questionário, com linguagem simples e objetiva para os sócios-gerentes, que geram uma pontuação no final da aplicação, facilitando a identificação de pontos fortes e oportunidades de melhoria para a empresa em questão. Desenvolveu-se então um aplicativo para este questionário que fora elaborado anteriormente A partir da aplicação do modelo proposto, o microempresário tem um diagnóstico de sua gestão, servindo de base para seu planejamento estratégico, rumo a melhoria contínua. Palavras Chave: PNQ, Micro Empresa, Diagnóstico. AbstractThis work searchs to develop an instrument to diagnosis the expectation of success of the small Brazilian company. Approach PNQ (Prêmio Nacional da Qualidade) is used as reference. First, a questionnaire was created, with simple and current language for the partnercontrolling, that generate a punctuation in the end of the application, facilitating the identification of strong points and chances of improvement for the company in question. A applicatory one for this questionnaire elaborated From the application of the considered model was developed previously, the owner of small busines has a diagnosis of its management, serving of base for its strategical planning, route the continuous improvement.
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