Thermal performance of an air solar collector with an absorber plate made of recyclable aluminum cans

Álvarez, G.; Arce, J.; Lira, L.; Heras, M.R.

doi:10.1016/j.solener.2004.02.007

Cited by 69 publications

(24 citation statements)

References 12 publications

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“… The absorber of a plate absorption coefficient α = 0.95, the transparent cover transmittance τ = 0. 9 and absorptive of the glass covers, αg = 0.05; 16 Positions of thermocouple's connecter to plates and two thermocouples to outlet and inlet flow;  Five fins under absorber plate form of semi cylindrical longitudinal was 1.84 m (length) × 0.03 m (Radian); the distance between two adjacent fins and fins 120 mm, and 5 mm thickness. Figure 5 shows the temperature of the transparent cover as a function of length along the solar collector.…”

Section: Experimental Setup and Measurement Proceduresmentioning

confidence: 99%

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Collector Efficiency by Single Pass of Solar Air Heaters with and without Using Fins

Chabane¹,

Moummi²,

Benramache³

et al. 2013

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Abstract. This paper presents the study of heat transfer in a solar air heater by using new design of solar collector. The collector efficiency in a single pass of solar air heater without, and with using fins attached under the absorbing plate has been investigated experimentally. Due to adding the fins to the interior of an absorber plate, the desirable effect of increasing the heat transfer coefficient compensates for the undesirable effect of decreasing the driving force (temperature difference) of heat transfer, while the attached fins provide an enlarged heat transfer area. In this study, the absorbing plate of solar collector is attached with fins for further improved performance. The improvements of collector efficiencies in the single pass solar air heaters with, and without fins attached; increase with increasing the mass flow rate, especially for operating at lower air flow rate. Experiments were performed for two air mass flow rates of 0.012 and 0.016 kg/s. Moreover, the maximum efficiency obtained for the 0.012 and 0.016 kg/s with, and without fins were 40.02, 51.50% and 34.92, 43.94% respectively. A comparison of the results of the mass flow rates by solar collector with, and without fins shows a substantial enhancement in the thermal efficiency.

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Section: Experimental Setup and Measurement Proceduresmentioning

confidence: 99%

“…Alvarez et al [9] developed an efficient single-glass air solar collector with an absorber plate made of recyclable aluminum cans. They compared the thermal efficiency of the collector with the reported ones.…”

Section: Introductionmentioning

confidence: 99%

Collector Efficiency by Single Pass of Solar Air Heaters with and without Using Fins

Chabane¹,

Moummi²,

Benramache³

et al. 2013

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show abstract

“…The main disadvantages are, nonetheless, its lower density and lower thermal capacity, as well as its lower heat conductivity [7][8][9]. To overcome this, extensive work is being developed to enhance heat transfer, through different designs of the solar air collector [5,7] and roughness of the absorber in the form of obstacles of different shapes and sizes, like ribs and fins [7,10].…”

Section: Introductionmentioning

confidence: 99%

Alternative for Summer Use of Solar Air Heaters in Existing Buildings

et al. 2017

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Among solar thermal technologies for indoor heating, solar air heaters (SAH) are appealing for implementation on existing buildings due to their simplicity, fewer risks related to the working fluid, and possible independence from the building structure. However, existing research work mainly focuses on winter use and still fails in providing effective solutions for yearly operation, which would enhance their interest. With the aim of analysing an alternative summer use, this work firstly characterises a double channel-single pass solar air collector through experimentation. From the obtained results, modelling and simulation tasks have been conducted to evaluate the possibilities of using hot air, provided by the SAH, while operating under summer conditions within a closed loop, to feed an air-to-water heat exchanger for domestic hot water (DHW) production. The system is studied through simulation under two different configurations for a case study in Valladolid (Spain), during the period from May to September for different airflows in the closed loop. Results show that daily savings can vary from 27% to 85% among the different operating conditions; a configuration where make-up water is fed to the heat exchanger being preferable, with a dedicated water tank for the solar heated water storage of the minimum possible volume. The more favourable results for the harshest months highlight the interest of extending the use of the solar air heaters to the summer period.

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“…Como consecuencia directa de ello se estimula a nivel gubernamental la exploración de fuentes alternativas de energía y el uso racional de la misma (URE) a partir de la apropiación y el desarrollo de herramientas tecnológicas que, por tanto, constituyen un tópico de marcada pertinencia para los diferentes campos de aplicación de la ingeniería. En este contexto, se destaca el interés por mejorar las características de eficiencia en los sistemas de generación de energía eléctrica sobre todo para casos en los cuales la energía proviene de fuentes alternativas como el viento (Burton & Davies, 1996) o la luz solar (Alvarez & Arce, 2003).…”

Section: Introductionunclassified

“…Las formas de onda a la salida del sistema de microgeneración son entonces el elemento crucial para valorar el desempeño del convertidor de potencia. Por tanto, el comportamiento del circuito puede describirse a partir de su evolución temporal transitoria y estacionaria dando cabida al análisis y el diseño de técnicas de control para manipular la dinámica del sistema de conversión de potencia a partir del control de activación (o disparo) de los dispositivos de conmutación asociados a la topología particular considerada (Alves de Melo & Bento, 2009;Jezernik, 2010;Yang & Wang, 2011;Iannelli, 2005;Sepulchre & Kokotovic, 1996;Scuadroni, 2002;RuizCruz et al, 2012).…”

Section: Introductionunclassified

Regulación de Voltaje por Control de Disparo Empleando Tecnologías FPAA

Durán-Blanco

Flórez-Vargas

Alzate-Castaño

2013

TecnoL.

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El presente artículo presenta resultados de implementación de algoritmos de control de disparo sobre un circuito convertidor de potencia del tipo rectificador controlado. La novedad de la implementación está constituida por la plataforma de ejecución basada en tecnología de arreglos analógicos programables por campo FPAA. Se verifica la acción de técnicas de control proporcional, PID y de modos deslizantes para regular la tensión de salida del circuito hacia una carga (bombilla) ante la acción de perturbaciones. Los resultados obtenidos permiten mostrar la potencialidad de la tecnología de implementación propuesta para aplicaciones de circuitos reconfigurables en electrónica de potencia.

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Thermal performance of an air solar collector with an absorber plate made of recyclable aluminum cans

Cited by 69 publications

References 12 publications

Collector Efficiency by Single Pass of Solar Air Heaters with and without Using Fins

Collector Efficiency by Single Pass of Solar Air Heaters with and without Using Fins

Alternative for Summer Use of Solar Air Heaters in Existing Buildings

Regulación de Voltaje por Control de Disparo Empleando Tecnologías FPAA

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