Solar distillation using a blackened mixture of Portland cement and alluvial sand as a heat storage medium

Sellami, M.H.; Guemari, S.; Touahir, R.; Loudiyi, Khalid

doi:10.1016/j.desal.2016.04.027

Cited by 26 publications

(8 citation statements)

References 10 publications

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“…Phase change materials (PCM) can be used for storing thermal energy and it has isothermal nature 43 . When PCM undergoes a change of phase from a solid to liquid, heat is absorbed, and the material regains its phase when this heat is released.…”

Section: Components Of Solar Stillsmentioning

confidence: 99%

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Desalination using solar stills: A review

Shelake

Kumbhar

Sutar

2022

Env Prog and Sustain Energy

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Purified drinking water is the basic need of human beings. Purification of water assisted by freely available solar energy can be the best alternative compared with other water purification techniques available in the market today which consume nonrenewable energy. Distillation, which is the most ancient method, is being used for water purification. The device in which solar thermal energy converts brackish water into pure drinkable form is known as a solar still. Present article reports an extensive study of numerous designs of solar stills. The article also includes a review of effect of each parameter that influences the water productivity that is, pure water.Considerations of thermodynamics, heat transfer, and mass transfer are also explained in brief. The reviews of various kinds of analysis namely, theoretical, experimental, computational, cost, and water quality have been reported.

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Section: Components Of Solar Stillsmentioning

confidence: 99%

“…Figure 4 shows the summarized graph of hours of the day versus hourly water productivity observed by various researchers 32–34,37,38,43,66,92,93,99,107 . The results obtained for 36 cases of solar stills including conventional as well as modified were reported in a single plot.…”

Section: Parameters Influencing Water Productivity Of the Solar Stillsmentioning

confidence: 99%

Desalination using solar stills: A review

Shelake

Kumbhar

Sutar

2022

Env Prog and Sustain Energy

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“…After solar stills V2 and V3 were run for 2 hours and V1 was run for 4 hours, the water temperature in solar stills V1, V2 and V3 increased to higher temperatures than in solar still P. This was attributed to the presence of iron sand in three of the stills, where the heat capacity of the sand was added to the heat capacity of the basin plate [24]. Because the heat capacity in these solar stills (V1, V2 and V3) was higher than in solar still P, the water temperature in solar stills V1, V2 and V3 increased more slowly than in solar still P. The heat from the solar stills was stored in the iron sand and then released gradually to the water [8,14,25], resulting in the water temperature increases in stills V1, V2 and V3. Moreover, the water temperature in solar stills V1, V2 and V3 was not responsive to the changes in solar radiation, which was attributed to the iron sand continuing to transfer heat to the water even when the heat from the sun dropped.…”

Section: Experimental Datamentioning

confidence: 99%

“…Extended porous fins made up of old blackened cotton rags were partially dipped inside the basin of the still in yet another study [13]. And in another, blackened Portland cement used as heat storage resulted in a 39% increase in the production of fresh water [14]. A modified solar still using silica sand and layered with black coal powder at its surface was used to study heat and mass transfer [15] in comparison to a conventional solar still.…”

Section: Introductionmentioning

confidence: 99%

Iron Sand as a Heat Absorber to Enhance Performance of a Single-Basin Solar Still

Mugisidi¹

2020

ARFMTS

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Many researchers already use sensible materials to enhance the performance of solar stills, but only a few use iron sand as a heat absorber in single-basin solar stills to enhance the performance, as demonstrated in this experiment. The study was conducted in the period August-September 2018 and used four solar stills with dimensions of 420 mm × 305 mm and a cover with a slope of 30 degrees. Three of the solar stills contained iron sand 20 mm high. The height of water in the three solar stills was 15 mm (V1), 20 mm (V2) and 25 mm (V3), so that the surface of the water would be: below the surface of the iron sand, on the same level as the surface of the iron sand, and above the surface of the iron sand, respectively. The fourth solar still, filled with only 20 mm (P) of water, was a benchmark for the others. From the results, we inferred that the heat absorbed by the iron sand enhanced the total heat transfer coefficients inside the solar still. This result agreed with exergy and overall efficiency of solar stills. The results showed that the fresh water produced by increasing V1, V2 and V3 against P was 1.5%, 51.8% and 57.1%, respectively. Therefore, we conclude that iron sand significantly enhances the productivity of a solar still. The best result was obtained when the water surface was higher than the iron sand surface.

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“…Development of economical solar still with high productivity is a major challenge. Various researchers worked to improve the productivity of solar still; some of those are by, changing basin geometry [1,2], reducing heat losses in the still [3,4], augmenting heat collection by concentrator and reflectors [5,6], preheating of inlet water [7,8], maintaining optimal flow rate, achieving drop wise condensation [9,10] reducing condenser surface temperature [11][12][13] use of various heat storage material [14,15] absorber surface texturing [16,17], using external condensers [18,19] etc. Fig.…”

Section: Introductionmentioning

confidence: 99%

Productivity improvement of single basin inclined solar still using enamel coating and copper chips

Joshi¹,

Shahed²,

Aware³

et al. 2019

DWT

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In the present study an attempt has been made to solve the problem of limited productivity of the conventional single slope horizontal basin solar still by improving its rate of evaporation. The conventional solar still is modified as a single slope inclined basin solar still with improved absorber surface. The absorber surface of the modified solar still is coated with black enamel paint and covered with copper chips. This resulted in augmented evaporation rate and in turn productivity of the system. The modified solar still having same footprint area as that of the conventional horizontal basin single slope solar still is fabricated and tested at Nagpur [21.14° N, 79.08° E] India. The effect of variation of feed water temperature (28°C-60°C) on the productivity of the solar still is also analysed. Theoretical modelling of both modified and conventional still is carried out and the results are compared. Experimentally the modified solar still is proved to be 9.5% more productive as compared with the conventional still. The details of modified solar still, experimental studies and the outcomes are discussed in the article.

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Solar distillation using a blackened mixture of Portland cement and alluvial sand as a heat storage medium

Cited by 26 publications

References 10 publications

Desalination using solar stills: A review

Desalination using solar stills: A review

Iron Sand as a Heat Absorber to Enhance Performance of a Single-Basin Solar Still

Productivity improvement of single basin inclined solar still using enamel coating and copper chips

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