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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

Estudo sobre piscina solar / Study on solar pool

Brito, Jose Clet 23 March 2006 (has links)
Orientador: Kamal Abdel Radi Ismail / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-08-09T17:08:37Z (GMT). No. of bitstreams: 1 Brito_JoseClet_M.pdf: 4633715 bytes, checksum: 1c1eff1cb154ddf97b9f0996fa4289bf (MD5) Previous issue date: 2006 / Resumo: Neste trabalho apresentamos um estudo sobre piscina solar, como retentora de energia térmica, para futura transformação em energia elétrica, sendo esta constituída por 03 camadas de água salgada com gradientes de densidades diferentes e em ordem crescente de cima para baixo, fazendo com que obtivéssemos 03 temperaturas também em ordem crescente. Fizemos o seu monitoramento durante onze dias, e os dados obtidos nos ensaios permitiram uma análise das diferenças entre as temperaturas final e inicial, da zona de armazenamento, zona intermediária, zona de superfície e o rendimento ao longo dos onze dias no intervalo de tempo das 8:00h. às 17:00h., conforme mostra as tabelas 4.1 a 4.12. A apresentação dos resultados em forma de gráfico é muito importante, pois permite extrair com mais realidade os parâmetros que descrevem, de forma simples, o omportamento da piscina solar de gradiente salino. As variações de temperatura de cada zona, para melhor visualização gráfica, são apresentadas nos gráficos 4.1 a 4.11, sendo nas ordenadas as temperaturas médias e nas abscissas os tempos. E, no gráfico 4.12, o rendimento em função da temperatura média. Após a realização dos ensaios, os pontos foram plotados, gerando os gráficos 4.1 a 4.12. Utilizamos o valor médio diário da radiação solar incidente, como sendo 837,34W/m2, segundo dados da Tese de Mestrado de LOPES, (2004), para latitude de 2,55º em relação a linha do equador em São Luís do Maranhão e a potência total disponível de 164,41W. Os dados experimentais informam que a temperatura máxima da zona de armazenamento foi obtido no 2º ensaio, correspondendo a 45ºC e sua eficiência máxima de 13,09%, obtido no 5º ensaio, com intervalo de confiabilidade, respectivamente iguais a [4,26 ; 8,26]% e [5,16 ; 6,32]ºC, conforme demonstrativo nos apêndices: D.2.10.2 e D.5.8.2 / Abstract: In this work we present a study on solar swimming pool, as retainer of thermal energy, for future transformation in electric energy, being this consisting by 03 salty with gradients of different densities and orderly water layers increasing from top to bottom, making with that we also got 03 temperatures orderly increasing. We made its monitoramento during eleven days, and the data gotten in the assays had allowed an analysis of the differences between the temperatures final and initial, of the zone of storage, intermediate zone, zone of surface and the income to the long one of the eleven days in the interval of time of 8:00h. to 17:00h., as it shows to tables 4,1 the 4.12. The presentation of the results in graph form is very important, therefore it allows to extract with more reality the parameters that they describe, of simple form, the behavior of the solar swimming pool of saline gradient. The variations of temperature of each zone, for better graphical visualization, are presented in graphs 4,1 the 4,11, being in commanded the average temperatures and the abscissas the times. E, in the graph 4,12, the income in function of the average temperature. After the accomplishment of the assays, the points had been located, generating graphs 4,1 the 4.12. We use the daily average value of the incident solar radiation, as being 837,34W/m2, according to data of the Thesis of Mestrado of LOPES, (2004), for latitude of 2,55º in relation the line of the equator in São Luís of the Maranhão and the available total power of 164,41W. The experimental data inform that the maximum temperature of the storage zone was gotten in 2º assay, corresponding 45ºC and its maximum efficiency of 13,09%, gotten in 5º assay, with trustworthiness interval, respectively equal [ 4,26; 8,26]% and [ 5,16; 6,32]ºC, as demonstrative in the appendices: D.2.10.2 and D.5.8.2 / Mestrado / Instrumentação e Controle Industrial / Mestre em Engenharia Mecânica
2

Energetické hodnocení systémů TZB / Energy Evaluation of Technical Services Systems

Cap, Petr January 2013 (has links)
This Master’s thesis deals with the energy evaluation of existing buildings sports-recreational company complex in Brušperk. For this purpose provides a comparison of selected fuels as an energy source for the heating in terms of economy and their impact on the environment. In addition, provides an overview of existing legislation for elaboration of an energy audit. To complement shows the calculation of return on investment in solar panels on the roof of one of the objects. Calculation is based on the results of performed experimental measurement. Finally, the thesis presents a comparison of energy performance of buildings simulated in the Bsim software with reality.

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