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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An?lise da efici?ncia de aquecedor solar espiral com e sem efeito estufa para piscinas

Gon?alves, Joel Nogueira 03 February 2010 (has links)
Made available in DSpace on 2014-12-17T14:57:59Z (GMT). No. of bitstreams: 1 JoelNG.pdf: 2105058 bytes, checksum: 962e04f5bc007f4ee28c0e1f7973dece (MD5) Previous issue date: 2010-02-03 / The technical and economic viability of solar heating for swimming pools is unquestionable, besides there it replaces the high costs and environmental impacts of conventional supply of energy, and it improves an optimization in the pool heating uses. This work applies the principles of the greenhouse effect: advanced thermodynamics, heat retention and equalization of temperature, to optimize the solar heating equipment, reducing the area required by collectors as much as 40% (still estimated value) for commercial collectors, with minor architectural and aesthetic impacts on the environment. It features a solar heating alternative in pools, whose main characteristics: low cost, simplicity in manufacturing and assembly and a faster heating. The system consists of two collectors spiral hoses made of polyethylene with a hundred meters each, and working on a forced flow, with only one pass of the working fluid inside the coils, and is used to pump itself treatment of pool water to obtain the desired flow. One of the collectors will be exposed to direct solar radiation, and the other will be covered by a glass slide and closed laterally, so providing the greenhouse effect. The equipment will be installed in parallel and simultaneously exposed to the sun in order to obtain comparative data on their effectiveness. Will be presented results of thermal tests for this the two cases, with and without transparent cover. Will be demonstrated, by comparison, the thermal, economic and material feasibility of these systems for heating swimming pools. / A viabilidade t?cnica e econ?mica do aquecimento solar para piscinas ? inquestion?vel, al?m da substitui??o da energia el?trica convencional, de altos custos e impactos ambientais, gera uma otimiza??o do uso da piscina. Este trabalho aplica os princ?pios do efeito estufa: isola??o termodin?mica, reten??o do calor e equaliza??o da temperatura interna, busca otimizar o equipamento de aquecimento solar, reduzindo a ?rea requerida pelos coletores em at? 40% (valor ainda estimado) em rela??o aos coletores comerciais, com menores impactos est?ticos e arquitet?nicos que s?o negativos no ambiente. Apresenta um sistema solar de aquecimento alternativo em piscinas, que tem como principais caracter?sticas; baixo custo, simplicidade nos processos de fabrica??o e montagem e um aquecimento mais r?pido. O sistema ? constitu?do por dois coletores espirais constru?dos em tubos flex?veis de polietileno, com extens?o de 100 metros cada uma, e trabalha em regime de fluxo for?ado, com apenas uma passagem do fluido de trabalho no interior das espirais, e ? utilizada a pr?pria bomba de tratamento de ?gua da piscina para a obten??o do fluxo pretendido. Um dos coletores ser? exposto diretamente ? radia??o solar, e o outro ser? coberto por um lamina de vidro e fechado lateralmente, de forma propiciar o efeito estufa. Os equipamentos ser?o instalados em paralelo e expostos simultaneamente ao sol, de forma se obter dados comparativos de suas efici?ncias. Ser?o apresentados resultados t?rmicos de ensaios realizados para os dois casos, com e sem cobertura transparente. Ser?o demonstradas comparativamente, as viabilidades t?rmica, econ?mica e de materiais destes sistemas para aquecimento de piscinas.

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