Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-03-12T13:28:18Z No. of bitstreams: 1 IvancaDeMedeirosDantas_DISSERT.pdf: 2285126 bytes, checksum: 50192ff365adf3cca55044be902b4c76 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-03-14T18:22:34Z (GMT) No. of bitstreams: 1 IvancaDeMedeirosDantas_DISSERT.pdf: 2285126 bytes, checksum: 50192ff365adf3cca55044be902b4c76 (MD5) / Made available in DSpace on 2018-03-14T18:22:35Z (GMT). No. of bitstreams: 1 IvancaDeMedeirosDantas_DISSERT.pdf: 2285126 bytes, checksum: 50192ff365adf3cca55044be902b4c76 (MD5) Previous issue date: 2017-10-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os fornos solares aproveitam a energia natural do sol e atrav?s dos princ?pios do efeito estufa e da concentra??o possibilitam o assamento de alimentos, se enquadrando em uma fonte de utiliza??o de energia limpa e sustent?vel. Apresenta-se um forno solar tipo caixa cuja as principais caracter?sticas eram seu baixo custo e simples processos de fabrica??o, montagem e operacionalidade. O forno solar alternativo teve suas paredes laterais fabricadas com material comp?sito de matriz de resina poli?ster tereft?lica com res?duo de caulim. No interior do comp?sito foi aplicado um recheio de espuma de poliuretano com a fun??o principal de diminuir o volume de resina utilizada e consequentemente o custo de fabrica??o do forno. A base do forno foi fabricada em madeira, com recheio de poliuretano, com o intuito de reduzir a perda de calor pelo fundo. O forno solar proposto tinha cobertura de vidro plano transparente e acima do recinto de assamento foi colocado um heliostato que fornecia energia adicional para promover o assamento de alimentos. O forno solar estudado tinha capacidade para assar v?rios mantimentos simultaneamente, o que representava uma grande vantagem em rela??o a outros fornos solares mostrados pela literatura. Foram realizados testes para assar alimentos tais como: quibes, queijo coalho, p?es, pizzas, empanados e bolos. Os ensaios demonstraram a viabilidade do forno solar proposto, uma vez que assou todos os alimentos escolhidos, com tempos competitivos com os obtidos por outros fornos j? estudados no LMHES/UFRN. Ressalte-se que a temperatura interna m?dia do absorvedor ficou em torno de 125?C e a temperatura interna do forno em torno de 100?C, sendo capaz de assar at? quatro bolos simultaneamente. Dessa forma, o forno solar estudado pode contribuir para a socializa??o do uso da energia solar por comunidades carentes, podendo at? se constituir em uma fonte de gera??o de emprego e renda. / Solar ovens take advantage of the natural energy of the sun and through the principles of the greenhouse effect and concentration make possible the roasting of food, fit into a source of clean and sustainable energy use. It is presented a box type solar cooker whose main characteristics were its low cost and simple processes of manufacture, assembly and operability. The alternative solar furnace had its side walls made of composite material of terephthalic polyester resin with kaolin residue. In addition to the polymeric composite, a polyurethane foam filling was applied with the main function of reducing the volume of resin used and consequently the cost of manufacturing the furnace. The base of the oven was made of wood, filled with polyurethane, in order to reduce heat loss from the bottom. The proposed solar furnace has transparent glass cover allowing the access of the solar rays to its interior and in addition was coupled to a heliostat providing the necessary heat to promote the food roasting. The studied solar furnace has the capacity to bake several groceries simultaneously, which represents a great advantage over other solar furnaces shown in the literature. Tests were carried out to bake foods such as: kibbe, curd cheese, breads, pizzas, chicken breaded and cakes. The tests demonstrated the viability of the proposed solar furnace, since it roasted all the established food, with times competitive with those obtained by other furnaces already studied in LMHES / UFRN. It should be noted that the average internal temperature of the absorber was around 125 ? C and the internal temperature of the oven around 100 ? C, being able to bake up to four cakes simultaneously. Thus, the studied solar furnace can provoke the socialization of the use of solar energy by needy communities, being able to constitute a source of employment and income generation.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-25T21:03:04Z No. of bitstreams: 1 ClovisCostaDeAraujo_DISSERT.pdf: 6711468 bytes, checksum: 3f268807d7c637201cbbbd74635c35ab (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-27T00:27:55Z (GMT) No. of bitstreams: 1 ClovisCostaDeAraujo_DISSERT.pdf: 6711468 bytes, checksum: 3f268807d7c637201cbbbd74635c35ab (MD5) / Made available in DSpace on 2016-04-27T00:27:55Z (GMT). No. of bitstreams: 1 ClovisCostaDeAraujo_DISSERT.pdf: 6711468 bytes, checksum: 3f268807d7c637201cbbbd74635c35ab (MD5) Previous issue date: 2015-07-31 / Apresenta-se um forno solar fabricado a partir de placas de MDF destinado ao assamento de alimentos, tais como pizzas, bolos, p?es, queijos e outros. Ser?o apresentados os processos de fabrica??o e montagem de tal forno, que tem baixo custo de fabrica??o. A principal caracter?stica do forno proposto ? que pode ser transportado para quaisquer localidades, pois fica assentado em um dispositivo de transporte. Foram realizados testes para o assamento de v?rios alimentos e seus resultados comparados com os v?rios tipos de fornos solares j? existentes mostrados pela literatura especializada. Ser?o analisadas as viabilidades t?rmica e econ?mica de tal forno, que pode proporcionar a socializa??o do uso da energia solar por comunidades carentes, podendo se tornar uma fonte de gera??o de emprego e renda. O forno solar proposto tem capacidade de assamento para v?rios alimentos; foram assados pizza, bolo, p?es, empanados, queijo e kibes. / It presents a solar oven manufactured from MDF boards intended for the baking of foods such as pizza, cakes, breads, hamburgers and the like. They will be given the manufacturing processes and assembly of such an oven which has features of low cost manufacturing. The main feature of the proposed furnace and can be transported to any locations because it is seated on a device for carrying case / backpack. Tests will be conducted for the baking of various foods and their results will be compared with the various types of existing solar ovens shown by the literature. They will analyze the thermal and economic feasibility of such an oven that can provide socialization of the use of solar energy for poor communities and can become a source of generation of employment and income. The proposed solar oven baking has capacity for two foods and can be manufactured to allow multiple simultaneous baking of food.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-02T12:02:52Z No. of bitstreams: 1 MarioCesarDeOliveiraSpinelli_DISSERT.pdf: 1794505 bytes, checksum: 421634dd8beb0490385dae1827f22967 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-07T15:50:19Z (GMT) No. of bitstreams: 1 MarioCesarDeOliveiraSpinelli_DISSERT.pdf: 1794505 bytes, checksum: 421634dd8beb0490385dae1827f22967 (MD5) / Made available in DSpace on 2017-02-07T15:50:19Z (GMT). No. of bitstreams: 1 MarioCesarDeOliveiraSpinelli_DISSERT.pdf: 1794505 bytes, checksum: 421634dd8beb0490385dae1827f22967 (MD5) Previous issue date: 2016-07-22 / Os fornos solares utilizam a energia proveniente do sol e atrav?s do efeito estufa possibilitam o assamento de alimentos, configurando-se uma fonte de utiliza??o de energia limpa e sustent?vel. Apresenta-se um forno solar fabricado a partir de placas de MDF destinado ao assamento de alimentos. Foram apresentados os processos de fabrica??o e montagem do forno proposto que apresenta baixo custo de fabrica??o. A principal caracter?stica do forno proposto ? a capacidade de assar v?rios alimentos simultaneamente. Foram realizados testes para o assamento de v?rios alimentos, com variadas cargas. Em um desses testes foi produzido o assamento de oito bolos em apenas oitenta minutos e seus resultados comparados com os v?rios tipos de fornos solares j? existentes mostrados pela literatura especializada. Os resultados dos testes de assamento demonstraram a viabilidade de utiliza??o do forno solar estudado e sua competitividade em rela??o aos fornos solares fabricados e testados no Brasil e no mundo, em fun??o de sua capacidade de assar uma carga significativa de alimentos, com uma efici?ncia de aproximadamente 80%. Foram analisadas a viabilidade t?rmica, onde foram alcan?adas temperaturas m?ximas de 140,5?C, e econ?mica de tal forno, que pode proporcionar a socializa??o do uso da energia solar por comunidades carentes, podendo se tornar uma fonte de gera??o de emprego e renda. O forno solar proposto foi testado para produzir o assamento de pizzas, bolos, p?es, empanados, queijos, acaraj?s, carne, lingui?a e quibes. / Solar ovens utilize energy from the sun and through the greenhouse enable baking food, and thereby it's a source of use of clean and sustainable energy. It presents a solar oven constructed using MDF intended for baking food such as pizza, cakes, breads, hamburgers and others. Were presented Manufacturing processes and assembly of the proposed solar oven which has a low manufacturing cost. The main characteristic of the proposed solar oven is the ability to cook various foods simultaneously. Tests were conducted for the baking of various foods, with varying loads. In one of these tests were baking eight cakes in only eighty minutes and the results were compared with the various types of solar oven shown the literature. The results of the baking tests demonstrated the feasibility of the solar oven and their competitiveness in relation to solar ovens manufactured and tested in Brazil and in the world., due to its ability to bake a significant load of food, with an efficiency of approximately 80%. Were analyzed the thermal viability, where maximum temperatures of 140,5?C were achieved, and the economic viability of the solar oven that can provide the socialization of the use of solar energy for underserved communities, and can become a source of generation of employment and income. The proposed solar oven was tested to produce the baking of pizzas, cakes, bread, breaded, cheese, acaraj?s, meat, sausage and meatballs.