Experimental Investigation on Concentrator-Assisted Solar-Stills

Zaki, Galal M.; Alturki, Abdullah; Al-Fatani, M.

doi:10.1080/01425919208909739

Cited by 42 publications

(11 citation statements)

References 6 publications

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“…Zaki, et al [18] and Abdul, et al [17] assert that the productivity of a solar distiller increases with increasing intensity of solar radiation received, these results are consistent with those obtained in the tests performed and are listed in Figure 7; this information restricts their use to areas where high solar radiation values as deserts, coasts and equatorial regions are present. Figure 8, 9 and 10 show a dependence of the distillate volume with respect to the temperatures present in the solar distiller, this trend was also presented by Rahul, et al [19] who observed that both the gain and the instantaneous efficiency loss are dependent on design factor which relates the temperature difference between water and the air above the value of the radiation intensity.…”

Section: Discussionsupporting

confidence: 79%

Experimental evaluation of a single slope solar still

2017

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In Colombia, there exist regions where they have wells, public cells or rivers as water resource. For this reason, there is the need of developing and evaluating mechanisms that allows improve water physical, chemical and microbiological conditions, used for human consumption in these regions. This paper describes the operation, the energy balance, the construction and tests of a prototype of single-slope solar distiller used to determine the influence of temperatures, thickness of condenser and water level inside the collector on thermal efficiency of the process of water distillation. The prototype was tested on noncontrolled environmental conditions at the city of Bucaramanga, measuring temperature, solar radiation and volume of distilled water. The trend lines gotten between volume of water distilled as a function of the incident solar radiation, the temperature difference between water and inner air in the distiller and between air and condenser on real operation condition, allowed the identification of optimal design parameters. After analyzing the results, it was observed a linear dependence between solar radiation and volume of water distilled, in addition to a dependence to the distilled volume to the difference of water temperatures, inner air and the condenser inside the distiller.Keywords: Distillation, Distiller Design, Thermal Efficiency, Solar Energy, Solar Radiation. ResumenEn Colombia, existen poblaciones que tienen pozos, pilas públicas y ríos como fuente de aprovisionamiento de agua. Por esta razón, surge la necesidad de desarrollar y evaluar mecanismos que permitan mejorar las condiciones físicas, químicas y microbiológicas del agua que se utiliza para consumo humano en estas regiones. Este artículo describe el funcionamiento, el balance energético, la construcción y pruebas de un prototipo de destilador solar de una sola pendiente, cuyo uso es la determinación de la influencia de las temperaturas, el espesor del condensador y el nivel del agua dentro del colector en la eficiencia térmica del proceso de destilación de agua. El prototipo fue probado en condiciones medioambientales no contraladas en la ciudad de Bucaramanga, midiendo temperatura, radiación solar y volumen de agua destilada. Las líneas de tendencia obtenidas entre el volumen destilado en función de la radiación solar incidente, la diferencia de temperatura entre el agua y el aire interno del destilador, y entre el aire y el condensador en condiciones reales de funcionamiento, permitieron definir los parámetros de diseño óptimo. Después de analizados los resultados, se observó una relación lineal entre la radiación solar y el volumen destilado, además de una dependencia del volumen destilado con las diferencias de temperaturas presentes entre el agua, el aire y el condensador dentro del destilador.

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Section: Discussionsupporting

confidence: 79%

Experimental evaluation of a single slope solar still

2017

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“…Kiatsiriroat et al (1987) analysed the performance of multiple-effect vertical solar still with a flat plate solar collector. Zaki et al (1992) experimentally investigated an active system of conventional single slope solar still integrated with a FPC under thermosyphon mode of operation and found that the maximum increase in the yield was up to 33% when the water in the still was preheated in the collector. Tiwari (1992) and Tiwari et al (2003a, b) studied the performance of passive as well as active solar stills and their computer modelling.…”

Section: Introductionmentioning

confidence: 99%

Comparative thermal performance evaluation of an active solar distillation system

Tiwari

Dimri

Singh

et al. 2007

Int. J. Energy Res.

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SUMMARYIn this paper, thermal models of all types of solar collector-integrated active solar stills are developed based on basic energy balance equations in terms of inner and outer glass temperatures. In this paper, hourly yield, hourly exergy efficiency, and hourly overall thermal efficiency of active solar stills are evaluated for 0.05 m water depth. All numerical computations had been performed for a typical day in the month of 07 December 2005 for the climatic conditions of New Delhi (28835 0 N, 77812 0 E, 216 m above MSL). The thermal model of flat-plate collector integrated with active solar still was validated using the experimental test set-up results. Total daily yield from active solar still integrated with evacuated tube collector with heat pipe is 4.24 kg m À2 day À1, maximum among all other types of active solar stills.

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“…The first system, built in Chile in 1872 [87], produced potable water for about 40 years. The advantages of simple passive solar stills are, however, offset by the small amounts of freshwater produced, approximately 2-3 l m −2 per day for the simple basin-type solar still [88] and the need for regular flushing of accumulated salts [76]. The performance of the simple basin-type solar still can be improved by integrating the unit with a water heating solar collector.…”

Section: Passive Basin Stillsmentioning

confidence: 99%

Industrial and Agricultural Applications of Solar Heat

Norton¹

2012

Comprehensive Renewable Energy

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Experimental Investigation on Concentrator-Assisted Solar-Stills

Cited by 42 publications

References 6 publications

Experimental evaluation of a single slope solar still

Experimental evaluation of a single slope solar still

Comparative thermal performance evaluation of an active solar distillation system

Industrial and Agricultural Applications of Solar Heat

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