Improvement of solar still performance by covering absorber with blackened layers of sponge

Sellami, M.H.; Belkis, T.; Aliouar, M.L.; Meddour, S.D.; Bouguettaia, Hamza; Loudiyi, Khalid

doi:10.1016/j.gsd.2017.05.004

Cited by 61 publications

(24 citation statements)

References 19 publications

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“…The heat transfer coefficient in the above equation is obtained from the following equation [20]: h c;wÀ g ¼ 0:884½ðT w À T g Þþ ðP w À P g ÞðT w þ273:15Þ ð268:9 � 10 3 À P w Þ � 1=3 (14) Convective heat transfer equation between the glass cover in a solar still and the surrounding is as follows [6]: Q c;gÀ sky ¼h c;gÀ sky A g T g À T sky À �…”

Section: First Principles Modelling Of the Solar Stillmentioning

confidence: 99%

First principles versus artificial neural network modelling of a solar desalination system with experimental validation

Bagheri

Esfandiari

Honarvar

et al. 2020

Mathematical and Computer Modelling of Dynamical Systems

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The present study mainly focuses on enhancing the performance of solar still unit using solar energy through cylindrical parabolic collector and solar panels. A 300 W solar panel is used to heat saline water by thermal elements outside the solar still unit. Solar panels are cooled during the hot hours of the day; thus, reducing their temperature may lead to an increase in solar panel efficiency followed by an increase in the efficiency of the solar still unit. The maximum amount of freshwater used in the experiment was 2.132 kg/day. The experiments were modelled using ANNs. Based on neural network simulation results, there is a significant correlation between experimental data and neural network modelling. This paper compares experimental data with data obtained from mathematical modelling and ANNs. As a conclusion, the artificial neural network prediction has been more accurate than the simplified first principles model presented.

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Section: First Principles Modelling Of the Solar Stillmentioning

confidence: 99%

First principles versus artificial neural network modelling of a solar desalination system with experimental validation

Bagheri

Esfandiari

Honarvar

et al. 2020

Mathematical and Computer Modelling of Dynamical Systems

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“…The desalination process using nonrenewable energy sources causes greenhouse gas emanation, which causes ecological contamination but leads to a sustainable power source as a substitute for powering the units. [1][2][3][4][5] The performance of the conventional solar still (CSS) was improved by using pumice stones, 6 gravel, 7 absorbent materials, 8 black color sponge, 9 integration with another solar still, 10 and using nanoparticles/fluids. [11][12][13][14][15][16][17][18][19][20] A novel portable thermoelectric desalination system has been researched by Hayden et al 21 In their work, thermoelectric material (TEM) was used to augment the condensation and evaporation rate.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative study of 3E (energy, exergy, and economy) analysis of various solar stills

Manokar

Vimala

Winston³

et al. 2020

Heat Trans

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In this paper, an experimental study of the conventional solar still (CSS), the conventional solar still with glass cooling (CSSGC), the conventional solar still with basin heating (CSSBH), and the conventional solar still with glass cooling and basin heating (CSSGCBH) was carried out on the basis of the distilled water production, the energy efficiency (EnE), the exergy efficiency (ExE), and economic analysis. The CSSGC and CSSBH contain Peltier modules for cooling the glass and heating the basin. The evaporative heat transfer coefficient for all the experimental stills was calculated. The values of daily distilled water production from the CSSGCBH, CSSBH, CSSGC, and CSS were 4.56, 3.79, 2.49, and 1.89 kg/m 2 , respectively. The daily distilled yield of the CSSBH and CSSGCBH were increased by 58.55% and 50.13%, respectively, as compared with the CSS. Moreover, the daily EnE and ExE of the CSSGCBH were 27.03% and 3.5%, respectively, whereas the EnE and ExE of the CSS were 10.88% and 1.3%, respectively. Furthermore, the cost of distilled water Abbreviations: CSS, conventional solar still; CSSBH, conventional solar still with basin heating; CSSGC, conventional solar still with glass cooling; CSSGCBH, conventional solar still with glass cooling and basin heating; EHTC, evaporative heat transfer coefficient; EnE, energy efficiency; ExE, exergy efficiency; T w − T g , temperature difference between the water and glass cover.

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“…The challenge has always been with respect to the limitations associated with cost and conversion efficiency [1]. Sellami et al [2] made use of layers of sponge on the absorber plate and were blackened in color. They evaluated the effect of sponge thickness on the distillate output.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still

Shivamallaiah¹,

Reddy²,

Shrikanth³

et al. 2020

JMES

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Acute shortage of drinking water has been on the rise owing to increasing population as well as shortage of drinkable water. Generation of potable water using passive solar stills is among the simplest and easier devices which make use of solar heat energy. However, the output of solar still is generally low owing to greater heat loss and needs improvement. In this paper, an experimental analysis is carried out to determine the performance of passive solar still with glass cover cooling using cold water generated using passive evaporative cooling process. The cold water required for cooling the glass cover is obtained using evaporative cooling process in the water tank which is wound with wet cotton cloth wick. The cold water thus obtained is sprayed onto the top surface of glass cover. The experiment is carried out in the outdoor conditions of Dubai from 10:00h to 14:00h and the temperature recordings of basin plate, glass cover, basin water, ambient air and cooling water are noted for every 30 minutes. The results reveal that the average increase in condensation heat transfer coefficient is found to be about 20.8% higher in the presence of glass cover cooling and the distillate output is found to increase by about 3.32 times. The average still efficiency is found to be relatively higher in the presence of cooling which is about 7.3% higher in the presence of cooling. The cold water temperature generated through evaporative cooling process is about 20.4% lower as compared to ambient temperature. Thus, the cooling of glass cover using cold water obtained through evaporative cooling process is found to be effective in enhancing the thermal performance of single basin solar still system.

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Improvement of solar still performance by covering absorber with blackened layers of sponge

Cited by 61 publications

References 19 publications

First principles versus artificial neural network modelling of a solar desalination system with experimental validation

First principles versus artificial neural network modelling of a solar desalination system with experimental validation

A comparative study of 3E (energy, exergy, and economy) analysis of various solar stills

Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still

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