Theoretical and experimental validation of evacuated tubes directly coupled with solar still

Panchal, Hitesh; Thakkar, Hemin

doi:10.1134/s0040601516110045

Cited by 56 publications

(9 citation statements)

References 9 publications

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“…Extensive studies are also carried out on single slope solar still by reflecting the solar radiation through the bottom absorber as inverted basin studied by Dev et al [23] and Suneja et al [24,25]. Several researchers investigated the integration of active solar still with FPC [26][27][28][29][30][31][32][33][34], Compound Parabolic Concentrator [35][36][37][38], Parabolic shaped concentrator [39], Parabolic Trough collector [40,41], Cylindrical parabolic concentrator [42,43], Evacuated Tube Collector [44][45][46][47], Parabolic Dish concentrator [10,48,49], Concentrator with crescent absorber [50], Solar pond [51][52][53][54], Solar still integration [55][56][57], Hybrid PV/T integrated solar still [58][59][60] for improving the yield.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

El‐Agouz

Kabeel

Subramani³

et al. 2018

Period. Polytech. Mech. Eng.

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IntroductionGreater growth of population and industries results in shortage of fresh water. Earth is almost covered with a larger water source and smaller land mass. People used to drink large amount of water for their thirsty need. Water available in the form of rivers, lakes cannot be consumed directly without pre-processing, as these need some purification process in order to remove bacteria and undissolved salts. In early days the possible method of getting pure water is heating the brackish water and condensing them back to get fresh water by burning fossil fuels. Due to the exhaustion of coal, crude oil and increases in global warming, the evolution of using renewable energy for getting fresh water evolved during the late 20th century. One of the best energy source applied is solar energy. Source of energy from sun is mostly environmental friendly and non polluting clean energy source. Basin type still is the most aged process of producing fresh water [1][2][3][4][5][6][7][8][9][10]. The fresh water conversion rate from the solar still system is predominantly depends on the solar intensity. The basin water temperature increases continuously due to heat energy emitted from the sun in the form of solar intensity. After reaching the boiling point of water, the water evaporates and it condenses on the solar still condenser cover. The various techniques employed in solar still, to raise the temperature of water and hence increases the productivity was studied from the detailed literatures reviews of Ravishankar et al. [11], Kabeel et al. [12] and Manokar et al. [13][14][15]. From the detailed literature studies it is clear that water temperature can be improved by either feeding waste warm water or pre heat the water by incorporating the different solar collectors or concentrators. Gupta et al. [16] theoretically analyzed the intermittent flow of waste warm water to the double basin solar still similarly same analyses was done by Yadav et al. in single basin solar still [17]. Sodha et al. [18] and Tiwari et al. [19] experimentally investigated the performance of solar still utilizing the warm water from the industry. Tiwari et al. [20] keep up a higher temperature difference between the water and collector cover by increasing the water temperature by flowing waste hot water in the basin and decrease the collector cover temperature by flowing the cold water above the surface of collector cover. This would results in increase in both evaporation and condensation

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Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

El‐Agouz

Kabeel

Subramani³

et al. 2018

Period. Polytech. Mech. Eng.

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“…Panchal (2015) have proved that the combined application of both black granite gravel and vacuum tubes increased the DBSS fresh water productivity to 65% and with the application of vacuum tubes alone in DBSS enhanced the fresh water productivity by 56%. Panchal and Thakkar (2016) had validated the thermal and experimental analysis carried out on solar still directly coupled with evacuated tubes during summer and winter climatic conditions. They concluded that the introduction of evacuated tubes and Polyurethane Foam type insulation material to the experimental model enhanced the distillate output and also helps in reducing heat loss.…”

Section: Introductionmentioning

confidence: 94%

Exergy and energy analysis of a tubular solar still with and without fins: a comparative theoretical and experimental approach

Sathyamurthy

Kabeel

Chamkha

et al. 2021

Environ Sci Pollut Res

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Today, availability of clean water is hard as the residents are expanding and moving fast to achieve rapid urbanization as a result need for clean water has been raised. Solar stills are the solution to desalinate to obtain pure water. This paper represents the theoretical and experimental study of tubular solar still with and without fins. The reading was recorded from 8:00 AM to 6:00 PM. Efficiency of TSS with fins and without fins are 23.39% and 13.76% respectively. The rate of irreversibility from the basin of TSS with flat is higher than TSS with finned absorber. Similarly, the rate of irreversibility from water is significantly reduced using finned absorber. Also, the exergy efficiency of TSS with finned absorber is higher compared to TSS with flat absorber.

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“…A conventional SS can be connected to a Flat Plate Collector (FPC) like in [11], [12], [13] or Evacuated Tube Collector (ETC) like in [14], [15], [16], [17], [18], [19], [15]. Those collectors are used to enhance the efficiency of the SS [20] [21]. The different designs of the SS integrated with ETC and FPC are shown in figures 5 and 6.…”

Section: Solar Still Integrated With the Collectormentioning

confidence: 99%

Passive Solar Desalination Systems. Classification, Study Parameters and Future Enhancements.

Essa

Gobran

Eewayed

et al. 2020

The Egyptian International Journal of Engineering Sciences and

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The scarcity in fresh water worldwide led to a great interest for the desalination systems. Passive desalination is a category of the desalination systems that fits the brackish and saline water desalination in the isolated zones without external energy source. This article introduces a comprehensive discussion of the existing designs of passive solar desalination systems. This includes the classification of different designs as well. The different parameters affecting the performance of the passive solar desalination systems are explored and discussed. The minimum water depth found to perform better than large water depths in the still basin. The wind speed found to affect positively on the desalination rate due to increasing the condensation rate. Using the fins on the surface of the cover found to enhance the desalinate productivity. Using of the heat storage found to improve the productivity during nighttime. Using reflectors to increase the solar energy incident on the basin increases the desalinate productivity. the inclination angle of the still found to improve the productivity if it is near the location latitude. However, the cover inclination has a negligible effect on the productivity. The cover material is preferred to be transparent with high thermal conductivity and lower thickness. Upon the findings based on the different parameters, some research points were suggested to enhance the performance of such systems.

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Theoretical and experimental validation of evacuated tubes directly coupled with solar still

Cited by 56 publications

References 9 publications

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

Exergy and energy analysis of a tubular solar still with and without fins: a comparative theoretical and experimental approach

Passive Solar Desalination Systems. Classification, Study Parameters and Future Enhancements.

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