Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-10-14T20:45:55Z No. of bitstreams: 1 SalomaoSavioBatista_DISSERT.pdf: 2870070 bytes, checksum: 1c9d7c169046174141d46268d573b0f6 (MD5) / Approved for entry into archive by Elisangela Moura (lilaalves@gmail.com) on 2015-10-14T22:56:40Z (GMT) No. of bitstreams: 1 SalomaoSavioBatista_DISSERT.pdf: 2870070 bytes, checksum: 1c9d7c169046174141d46268d573b0f6 (MD5) / Made available in DSpace on 2015-10-14T22:56:40Z (GMT). No. of bitstreams: 1 SalomaoSavioBatista_DISSERT.pdf: 2870070 bytes, checksum: 1c9d7c169046174141d46268d573b0f6 (MD5) Previous issue date: 2013-12-27 / Com o crescimento da popula??o e a necessidade do aumento do consumo energ?tico no Brasil e no mundo, ? not?ria a import?ncia do uso de energias tidas como renov?veis para suprir essa demanda. Pensando nisso, o estudo de fontes renov?veis, como a energia solar, ? uma op??o para resolver tal problem?tica. O projeto exposto vem como uma das alternativas de suprir essa problem?tica com o foco uso da energia para a coc??o de alimentos e diminuir o uso de fontes que poluem o meio ambiente com gera??o de g?s carb?nico tendo como outro foco a diminui??o do desmatamento e da desertifica??o, ambos origin?rios do uso da lenha e de combust?veis f?sseis como fonte de energia. Foram confeccionados dois prot?tipos feitos com tambores de polietileno caracterizando como uma atividade de reuso ou reciclagem j? que iriam ser depositados no meio ambiente. Os fornos foram testados para produzirem o assamento de alguns alimentos convencionalmente preparados em fornos convencionais a g?s. No mais eficiente dos prot?tipos a temperatura do absorvedor alcan?ou 120,8?C. Os tempos de assamento para tais alimentos foram superiores aos obtidos com o forno convencional a g?s, por?m competitivos com outros fornos solares mostrados pela literatura solar para assamento de alimentos. / With population growth and the need for increased energy consumption in Brazil and worldwide, it is clear the importance of using renewable energies as taken to meet this demand. Thinking that, the studies from renewable sources such as solar power is an option to resolve such problems. The project has been exposed as an alternative to overcome this problem with the use of focused energy to cook food and decrease the use of sources that pollute the environment with carbon dioxide generation focusing on the secondary does not increase deforestation, desertification, both of which originate from the use of wood and fossil fuels as an energy source. For both two prototypes were fabricated for comparison, both being made with polyethylene drums featuring as an active reuse or recycling, since the same would be deposited in the environment. The ovens were tested to yield the baking of some foods conventionally prepared in conventional gas ovens. In more efficient prototypes temperature of the absorber reached 120.8 ? C. The baking times for such foods were higher than those obtained with the conventional gas oven, but competitive with other solar ovens shown by solar literature for baking food.

Made available in DSpace on 2014-12-17T14:58:22Z (GMT). No. of bitstreams: 1 TiagoSS_DISSERT.pdf: 3176219 bytes, checksum: 52cc9f63816eb64b9870125bb84fe2a5 (MD5) Previous issue date: 2013-07-26 / The scarcity of farmland, reducing the supply of irrigation water and lack of technologies for conservation, makes the globalized world facing serious difficulties in the production of food for its population. The most viable outlet for this dilemma is the dissemination of technologies, economically viable and available to the whole population, for dehydration of perishable foods produced. This paper presents a solar dryer of direct exposure to the production of dried fruit, made from recycled polyethylene drum of 200 liters, used for storing water or trash. The drum was sectioned in half in its longitudinal axis and has its halves together forming a trough-like structure. It describes the processes of construction and assembly of solar dryer proposed, whose main characteristic its low cost, and was designed for use by people with low income, for processing fruits widely available in our region (mango, banana, guava, cashew, pineapple, tomato and others) in dried fruit and flour, contributing significantly to increase the life of these foods. The nuts and flours can be used for own consumption and for marketing jobs and income generation. Tests were conducted to diagnose the feasibility of using solar dryer for the various types of tropical fruits. Were also compared parameters such as drying times and thermal efficiency obtained with the prototype found in the specialized literature in food dehydration. The drying times in the dryer were obtained competitive with those obtained in other models of dryers LMHES developed / A escassez de ?reas de cultivo, redu??o da oferta de ?gua para irriga??o e falta de tecnologias para conserva??o, faz o mundo globalizado enfrentar graves dificuldades na produ??o de alimentos para sua popula??o. A sa?da mais vi?vel para tal dilema ? a dissemina??o de tecnologias, economicamente vi?veis e dispon?veis a toda popula??o, para desidrata??o dos alimentos perec?veis produzidos. Este trabalho apresenta um secador solar de exposi??o direta para a produ??o de frutas secas, fabricado a partir de um tambor de polietileno reciclado, de 200 litros, usado para armazenamento de ?gua ou lixo. O tambor foi seccionado ao meio, em seu eixo longitudinal, e teve suas metades unidas formando uma estrutura tipo calha. Ser?o descritos os processos da constru??o e montagem do secador solar proposto, que tem como principal caracter?stica seu baixo custo, e foi idealizado para uso de pessoas com baixa renda, para o processamento de frutas amplamente dispon?veis em nossa regi?o (manga, banana, goiaba, caju, abacaxi, tomate e outros) em frutas secas e farinhas, contribuindo significativamente para aumentar a vida ?til desses alimentos. As nozes e farinhas podem ser utilizadas para consumo pr?prio e para trabalhos de marketing e gera??o de renda. Foram realizados testes para diagnosticar a viabilidade do uso de secador solar para os diversos tipos de frutas tropicais. Foram tamb?m comparados par?metros como tempos de secagem e efici?ncia t?rmica, obtidos no prot?tipo com os encontrados na literatura especializada em desidrata??o de alimentos. Os tempos de secagem obtidos no secador foram competitivos com os obtidos em outros modelos de secadores desenvolvidos no LMHES