Experimental study on the air velocity effect on the efficiency and fresh water production in a forced convective double slope solar still

Téllez, Margarita Castillo; Figueroa, Isaac Pilatowsky; Sánchez-Juárez, A.; Fernández-Zayas, José Luis

doi:10.1016/j.applthermaleng.2014.10.032

Cited by 41 publications

(8 citation statements)

References 17 publications

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“…They concluded that several methods are effective: reducing the water depth increases the evaporation rate, cover glass angle also affects productivity, increasing insulation thickness to reduce heat losses, and in the basin absorber material should be utilized to improve SS productivity. Castillo‐Téllez et al 75 experimented on SS to analyze the air velocity effect on thermal efficiency. Discovered production of water and thermal efficiency increases up to air velocity 5.5 m/s and subsequently decreases at higher air velocity.…”

Section: Exergoenvironment and Enviroeconomic Analysismentioning

confidence: 99%

Energy, exergy, economic, exergoeconomic, exergoenvironment, and enviroeconomic (6E) analysis of solar stills—A critical review

Maurya,

Kumar,

Gupta

et al. 2023

Energy Science & Engineering

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Drinking water is a crucial need for human survival and solar stills (SSs) have emerged as a cost‐effective solution to meet this need from an economic point of view. In this work, the working of various SSs, their productivity factors, and various devices that can be integrated to improve their efficiency have been studied. The conversion of saline water into freshwater water using SSs has the potential to address the issue of drinking water. This study highlights the importance of SSs as a viable and sustainable solution for drinking water access. On the basis of various parameters correlating to the performance of the SSs, energy, exergy, economics, exergoeconomics, exergoenvironment, and enviroeconomics analysis has been analyzed in this study. To improve the performance and sustainability of SSs, various combinations were studied. These combinations include SSs with different nanoparticle coatings, phase‐change materials, photovoltaic modules, external condensers, wick materials, and reflectors. It is concluded that a comprehensive framework that integrates thermodynamic, economic, and environmental criteria can guide the development of more efficient and sustainable SS technologies.

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Section: Exergoenvironment and Enviroeconomic Analysismentioning

confidence: 99%

Energy, exergy, economic, exergoeconomic, exergoenvironment, and enviroeconomic (6E) analysis of solar stills—A critical review

Maurya,

Kumar,

Gupta

et al. 2023

Energy Science & Engineering

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“…3,5,6 The yield of a conventional solar still normally lies between 2 and 5 L m À2 per day. 3,4,7 To overcome this bottleneck, researchers conducted numerous studies on different design parameters of solar still, like, the effect of tilt of still, 8,9 depth of saline water, 10 different geometric modifications, [11][12][13] shading, 14 and evaporative fans 15 for its productivity enhancement.…”

Section: Status Of Solar Still Technology: Active and Passive Solar D...mentioning

confidence: 99%

“…The yield of a conventional solar still normally lies between 2 and 5 L m −2 per day 3,4,7 . To overcome this bottleneck, researchers conducted numerous studies on different design parameters of solar still, like, the effect of tilt of still, 8,9 depth of saline water, 10 different geometric modifications, 11–13 shading, 14 and evaporative fans 15 for its productivity enhancement. Later, these passive solar stills were combined with external heat supply sources such as flat plate collector (FPC), 16 photovoltaic panels based hybrid system, 17 evacuated tube collector (ETC), 18 heat pipe, 19 and solar pond, 20 to improve the daily distillate productivity and thus make a new class of stills known as active solar still.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of a novel direct absorption solar collector augmented solar still using silver nanofluids

Kumar

Chander

Singh

2022

Env Prog and Sustain Energy

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Solar desalination is a viable alternative for clean water for the areas where plenty of sunshine is available throughout the year. Due to less productivity of distilled water in passive solar still, it is still a challenge for the researchers to commercialize this low-cost renewable technology. In the last decade, much effort has been made by researchers to improve the overall productivity of solar stills by expanding novel active system methods. For the work presented here, a novel nanofluid-laden reverse-irradiated direct absorption solar collector (RI-DASC) augmented active solar still is proposed and tested under laboratory conditions for the very first time. Ag nanoparticles of sizes ~5-10 nm were used to prepare the nanofluids and were used as working fluid in the RI-DASC system. The system transfers the heat to the basin of active solar still directly omitting the need of piping arrangement. Experiments were conducted under different ambient conditions and for different mass loadings of Ag nanoparticles, that is, 0.1 mg L À1 , 0.2 mg L -1 , and 0.4 mg L À1 in RI-DASC augmented active solar still. The results showed that the temperature difference between the top glass cover and the basin of solar still was significantly higher in novel active solar compared to the conventional single slope passive still. Ag nanofluids with a mass fraction of 0.4 mg L À1 lead to a maximum temperature rise and thus overall thermal efficiency over other tested Ag nanofluids. The novel DASC augmented active solar still is practically viable using reflectors and can enhance the freshwater productivity over a conventional solar still.

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“…[7] . According to the meteorological data obtained from Bangladesh Meteorological Department (BMD), Bangladesh receives an average of 3.125 kWh/m 2 -day solar radiation during the summers (March-June) with a sunshine hour of 4.4 h-7 h; in the winters, there is an average of 2.31 kWh/m 2 -day solar radiation (October-March) with a sunshine hour of 6 h-9 h. In addition, it is possible for Bangladesh to apply solar still using local labor and low-cost readily available materials, and even illiterate people can operate solar still due to its very simple operations, thus increasing its productivity, as pointed out in several literature [8][9][10][11][12][13][14] . Badran and Abdullah have coupled the sun tracking system to the solar still and have observed a 22% increase in productivity and a 2 % increase in overall efficiency [15] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of a Solar Still Desalination System

Guo¹,

Liu²

2022

ssr

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Solar still is a simple equipment for the fresh water production in the regions where water is scarce and is rich in solar energy sources. In this paper, a solar still unit was built and tested in the south of China to investigate its water production. The test results show that the fresh water production is affected by average solar irradiation intensity, the production of the unit averaged at 6.27 kg/day, the water production decreased to 1.9 kg/day when the daily average solar radiation decreased to 236 W/m2. At the same time, the test result show that because of the difference between the ambient and seawater temperatures, the solar still could produce water at night, and the daily production could increase to 7.55 kg/day when the daily average solar radiation is 533 W/m2.

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Experimental study on the air velocity effect on the efficiency and fresh water production in a forced convective double slope solar still

Cited by 41 publications

References 17 publications

Energy, exergy, economic, exergoeconomic, exergoenvironment, and enviroeconomic (6E) analysis of solar stills—A critical review

Energy, exergy, economic, exergoeconomic, exergoenvironment, and enviroeconomic (6E) analysis of solar stills—A critical review

Thermal performance analysis of a novel direct absorption solar collector augmented solar still using silver nanofluids

Experimental Study of a Solar Still Desalination System

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