Diffuse Solar Radiation
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Determination of Diffused Irradiation from Horizontal Global Irradiation - Study for the City of Curitiba
Abstract Understanding the solar radiation values in the surface is important for the development of solar energy projects, obtaining through radiometers installed in certain places or publications as in solar energy atlases. Typically, solar or weather stations do not have sensors to measure diffuse irradiation due to high investment and the need for const
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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2. Synthesis, Characterization, and Photocatalytic Activity of Pure and N-, B-, or Ag- Doped TiO2
This article reports the synthesis and characterization of pure and N-, B-, and Ag-doped TiO2 and the ability of these oxides to photodegrade methylene blue (MB) under sunlight or UV-ABC radiation. The compounds were synthesized using the sol-gel method and characterized by scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Fo
J. Braz. Chem. Soc.. Publicado em: 2017-09
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3. INFLUENCIA DEL USO DE MALLA PERLA Y ROJA EN LAS CONDICIONES MICRO-CLIMÁTICAS, DAÑO POR SOL Y DESARROLLO DE COLOR DE FRUTOS EN HUERTOS DE MANZANOS CVS. GALA Y FUJI
ABSTRACT Sun damage and the lack of color of fruits produced by excessive solar radiation and high temperatures is the biggest production problem in apple orchards in Chile. The objective of this research was to evaluate the use of colored nets as a tool for control of sun damage and improve color on apples. During the 2012-13 and 2013-14 season ´Fuji´ an
Rev. Bras. Frutic.. Publicado em: 30/03/2017
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4. Solar radiation use efficiency by soybean under field conditions in the Amazon region.
Abstract ? The objective of this work was to evaluate the efficiency of soybean (Glycine max) in intercepting and using solar radiation under natural field conditions, in the Amazon region, Brazil. The meteorological data and the values of soybean growth and leaf area were obtained from an agrometeorological experiment carried out in Paragominas, Pará state
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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5. Materiais híbridos orgânico-inorgânicos (ormosil) obtidos por sol-gel com potencial uso como filtro solar
This work aimed at the synthesis and characterization of particles of modified silica containing the organic filter dibenzoylmethane (DBM) by the hydrolytic sol-gel method, with modifications to the Stöber route. The structures of the resulting Xerogels were characterized by diffuse reflectance UV-VIS spectroscopy in the solid state, infrared absorption spe
Química Nova. Publicado em: 2011
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6. Medição da Radiação Solar Global e Difusa Utilizando Piranômetros com Sensores Fotoelétricos / Medição da Radiação Solar Global e Difusa Utilizando Piranômetros com Sensores Fotoelétricos
No Brasil, a maior parte das Instituições que medem radiação solar disponibiliza apenas dados de radiação global incidente em uma superfície horizontal. Na região de Pelotas-RS, a Estação Agroclimatológica de Pelotas, vinculada à Embrapa, tem os dados de radiação solar global diária estimados desde 1971 até 1992 e medidos a partir de 1993. Co
Publicado em: 2008
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7. Determinação e verificação de ângulos de céu decorrentes dos padrões de ocupação do solo nos bairros de Cabo Branco e Tambaú - João Pessoa-PB
The present research determines and verifies the efficiency of obstructed sky angles due to occupation of the actual area and those related to three other settlements suggested by Peregrino (2005) to a segment of the districts of Cabo Branco and Tambaú on João Pessoa PB. We used the methodology developed by Pereira (1994), based in the scheduled balanced r
Publicado em: 2007
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8. Desenvolvimento de um protÃtipo de rastreador solar de baixo custo e sem baterias
In the last fifty years, the use of solar energy in the world has been growing considerably in its principal modalities: thermal and photovoltaic. Although there has been significant evolution of the photovoltaic technology along the last decades, the cost of the energy produced by those systems is still expensive when compared to the energy produced by conv
Publicado em: 2007
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9. Fotodegradação de hidrocarbonetos policíclicos aromáticos em placas de sílica impregnadas com dióxido de titânio
Photodegradation of the PAHs anthracene, chrysene and benzo[k]fluoranthane on silica gel impregnated with TiO2 and over glass plates holding TiO2 was studied. Silica gel plates holding these substances were exposed to solar radiation, developed with hexane and photographed under ultra-violet light. The plates containing benzo[k]fluoranthene were also analyse
Química Nova. Publicado em: 2005-06
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10. Comportamento e correÃÃo da radiaÃÃo solar difusa obtida com o anel de sombreamento
This paper shows the comportment of solar radiation global, direct and diffuse radiation at Cascavel, classifies the skyâs cover in function of the cloudiness index and studies the applicability of the numeric correction of RICIERI (1998) on diffuse radiation measured with a shadow ring. The research was done at meteorological experimental station of UNIOES
Publicado em: 2005
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11. Coupled tridimensional heat and moisture transfer in soils under buildings / Transferência tridimensional acoplada de calor e de umidade em solos sob edificações
After the wide world crisis of energy in the 70#s and the interest in energy consumption reduction, some computational programs had been developed to simulate the building energy performance. However, these codes present some simplifications on their calculation routines of heat transfer through the ground. In this way, we have described a mathematical model
Publicado em: 2003
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12. Analise da refletancia de cores de tintas atraves da tecnica espectrofotometrica
In this work, the reduction of heat gain through the choice of appropriate external color is studied as a principle of bioclimatic conception. A methodology is proposed to obtain data of color reflectance, using spectrophotometric technique. The method provides not only the total reflectance, but also the percentage of reflection along the spectrum. An acces
Publicado em: 2002