Comparison study for three types of solar collectors for water heating

Matrawy, K.K.; Farkas, I.

doi:10.1016/s0196-8904(96)00089-1

Cited by 58 publications

(17 citation statements)

References 6 publications

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“…Description of the solar collector and its absorber plate The rectangular geometry described in Figure 1b was taken as reference given that it is a common geometry in this type of collectors (Matrawy & Farkas, 1997). The curved plate geometry described in Figure 1c is a proposal of this work, with the presumption that it may increase the thermal efficiency of the absorber plate, mainly due to the increase in the tube-to-plate area of contact.…”

Section: Methodsmentioning

confidence: 99%

“…Hottel & Woertz (1942) and Hottle & Whiller (1958) are among the pioneers involved in analyzing the performance of flat plate collectors with parallel tubes, and have also carried out an energy balance of a flat plate collector in order to determine the heat absorbed by the plate. Arrangements in the geometric configuration of the solar collector have also been the focus of several studies, such as those carried out by Matrawy & Farkas (1997) and Balaram Kundu (2002), who proved the importance of the collector geometry.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis of a solar collector plate using two plate geometries

et al. 2016

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The thermal behavior of an absorber plate in a solar collector is investigated using finite element analysis. The thermal behavior and efficiency of two absorber plate geometries are studied, using a typical solar collector with a rectangular profile as reference, and a proposed absorber plate with curved geometry. An analysis of the most important parameters involved in the design of the absorber plate was carried out, indicating that the curved geometry of the absorber plate yields an average efficiency ~ 25 % higher than the conventional rectangular geometry. The results suggest that a curved profile made of materials such as aluminum with thermal conductivity higher than 200 W/m °C, plate thickness of the order of 2-3 mm and with a large density of tubes per unit area of the collector´s plate greatly benefits the thermal efficiency of the solar collector.Keywords: Absorber plate, finite element analysis, solar collector, efficiency, geometry. RESUMENEl comportamiento térmico de una placa de absorción en un colector solar se investigó usando análisis de elemento finito. Se investiga el comportamiento térmico y la eficiencia de dos geometrías de plato absorbedor, un colector solar típico con plato absorbedor rectangular, utilizado como referencia, y una propuesta con geometría curva. Un análisis de los parámetros más importantes que intervienen en el diseño de la placa de absorción se llevó a cabo, indicando que la geometría curva de la placa de absorción ofrece una eficiencia media ~ 25 % mayor que la geometría rectangular convencional. Los resultados sugieren que un perfil curvado hecho de materiales tales como aluminio con conductividad térmica mayor a 200 W/m °C, espesor de placa del orden de 2 a 3 mm y una mayor densidad de tubos por unidad de área de la placa de absorción, beneficia en gran medida la eficiencia térmica del colector solar.Palabras clave: Plato absorbedor, análisis de elemento finito, colector solar, eficiencia, geometría.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite element analysis of a solar collector plate using two plate geometries

et al. 2016

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“…Isso equivale a dizer que menos de 1% da energia solar disponível nas massas continentais seria suficiente para suprir de energia à humanidade. Considerando-se toda a área da terra, a disponibilidade aumenta para 1,02 X 10 13 GWh.…”

Section: Revisão Bibliográficaunclassified

Aplicação De Materiais Alternativos Para O Uso Da Energia Solar

Neto¹,

Gomes²,

Souza³

et al. 2014

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RESUMOSabe-se que a maioria das tecnologias e fontes energéticas utilizadas atualmente, além de não serem renováveis, não são ecologicamente corretas. Nesse contexto, o uso de tecnologias alternativas para preservação do meio ambiente se faz necessário. Este artigo descreve a construção de um coletor solar constituído de materiais alternativos de baixo custo para aquecimento de água, no qual a viabilidade térmica e econômica será avaliada. PALAVRAS-CHAVE:Coletor solar, materiais alternativos, baixo custo. ALTERNATIVE MATERIALS TO SOLAR ENERGY USE ABSTRACTIt has been known that most of the technologies and energetic sources currently used are neither renewable nor eco-friendly. Then, the use of alternative technologies for keeping the environment is necessary.This article describes the building of a solar collector made by low cost alternative materials for water heating in which the thermal and economical viability will be evaluated.

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“…Several studies dedicated to improving the thermal performance of flat plate collectors have been done, some of these have focused on achieving better performance by a low temperature difference between plate and fluid [1] for example, Matrawy and Farkas [2] investigated parallel and serpentine tube arrangements in conventional sheet and tube absorber plates while Rommel and Moock [3] analytically studied solar absorbers with rectangular fluid ducts. Alvarez et al [4] investigated a flat-plate collector with a surface contact with the heat transport fluid.…”

Section: Introductionmentioning

confidence: 99%