Impact of water depth on thermal efficiency, exergy efficiency, and exergy losses of finned acrylic solar still: an experimental study

2021 ◽  
Author(s):  
Mohammed El Hadi Attia ◽  
Saravanan Kaliyaperumal ◽  
Gunasekar Thangamuthu ◽  
Ilango Rengaraju ◽  
Suman Mann ◽  
...  
Keyword(s):  
Experimental Study ◽  
Water Depth ◽  
Thermal Efficiency ◽  
Exergy Efficiency ◽  
Solar Still ◽  
Exergy Losses

Influence of Various Basin Types on Performance of Passive Solar Still: A Review

2021 ◽  
Vol 10 (4) ◽  
pp. 789-802
Author(s):  
Tri Hieu Le ◽  
Minh Tuan Pham ◽  
H Hadiyanto ◽  
Van Viet Pham ◽  
Anh Tuan Hoang
Keyword(s):  
Water Depth ◽  
Thermal Efficiency ◽  
Tracking System ◽  
Design Parameters ◽  
Cylindrical Shape ◽  
Solar Still ◽  
Practical Utilization ◽  
Passive Solar Still ◽  
Passive Solar ◽  
The Impact

Passive solar still is the simplest design for distilling seawater by harnessing solar energy. Although it is undeniable that solar still is a promising device to provide an additional freshwater source for global increasing water demand, low thermal efficiency along with daily distillate yield are its major disadvantages. A conventional solar still can produced 2 to 5 L/m2day. Various studies have been carried out to improve passive solar stills in terms of daily productivity, thermal efficiency, and economic effectiveness. Most of the researches that relate to the daily output improvement of passive solar still concentrates on enhancing evaporation or/and condensation processes. While the condensation process is influenced by wind velocity and characteristics of the condensed surface, the evaporation process is mainly affected by the temperature of basin water. Different parameters affect the brackish water temperature such as solar radiation, design parameters (for example water depth, insulators, basin liner absorptivity, reflectors, sun tracking system, etc). The inclined angle of the top cover is suggested to equal the latitude of the experimental place. Moreover, the decrease of water depth was obtained as a good operational parameter, however, the shallow water depth is required additional feed water for ensuring no dry spot existence. Reflectors and sun-tracking systems help solar still absorb as much solar intensity as possible. The internal reflector can enhance daily yield and efficiency of stepped solar still up to 75% and 56% respectively, whereas, passive solar still with the support of a sun-tracking system improved daily yield up to 22%. Despite large efforts to investigate the impact of the different parameters on passive solar distillation, the effect of the basin liner (including appropriate shapes and type of material), needs to be analyzed for improvement in practical utilization. The present work has reviewed the investigation of the solar still performance with various types of basin liner. The review of solar stills has been conducted critically with rectangular basin, fins basin, corrugated basin, wick type, steps shape, and cylindrical shape basin with variety of top cover shapes. The findings from this work conclude that the basin liner with a cylindrical shape had better performance in comparison with other metal types and provides higher freshwater output. Stepped type, inclined, fin absorber, and corrugated shapes had the efficient performance.  Further exploration revealed that copper is the best-used material for the productivity of passive solar still.

Effect of water depth and insulation on the productivity of an acrylic pyramid solar still – An experimental study

2020 ◽  
Vol 10 ◽  
pp. 100319 ◽  
Author(s):  
A. Muthu Manokar ◽  
Yazan Taamneh ◽  
Abd Elnaby Kabeel ◽  
D. Prince Winston ◽  
P. Vijayabalan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Water Depth ◽  
Solar Still ◽  
Effect Of Water

scholarly journals Exergy and Energy Analysis of a Tubular Solar Still with and without Fins: Comparative Theoretical and Experimental Approach

2021 ◽  
Author(s):  
Prof. Dr. Ravishankar Sathyamurthy ◽  
Abd Elnaby Kabeel ◽  
Ali Chamkha ◽  
Hemanth Arun Kumar ◽  
Hariprasath Venkateswaran ◽  
...  
Keyword(s):  
Experimental Study ◽  
Experimental Approach ◽  
Energy Analysis ◽  
Pure Water ◽  
Exergy Efficiency ◽  
Clean Water ◽  
Solar Still ◽  
Rapid Urbanization

Abstract 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.

Experimental study on conventional solar still integrated with inclined solar still under different water depth

2018 ◽  
Vol 48 (1) ◽  
pp. 100-114 ◽  
Author(s):  
Abd Elnaby Kabeel ◽  
Yazan Taamneh ◽  
Ravishankar Sathyamurthy ◽  
Padmanabhan Naveen Kumar ◽  
Athikesavan Muthu Manokar ◽  
...  
Keyword(s):  
Experimental Study ◽  
Water Depth ◽  
Solar Still

scholarly journals Effect of water depth, Inlet water temperature, and fins on the productivity of a pyramid solar still – An experimental study

2020 ◽  
Author(s):  
Malik Yousef Al-Abed Allah ◽  
Mohammad Omar Abu Abbas
Keyword(s):  
Experimental Study ◽  
Water Temperature ◽  
Surface Area ◽  
Water Depth ◽  
Research Work ◽  
Experimental Results ◽  
Bottom Of The Pyramid ◽  
Solar Still ◽  
Effect Of Water

Abstract. Many approaches are using to improve the productivity of the pyramid solar still. Pyramid solar still provides a larger surface area than conventional types of solar still. In this research work, three sections have been evaluated. The first section has been studied by changing the water depth from 1 to 5 cm. In the second part of the experiment, increasing the inlet water temperature has been investigated, and finally, adding fins at the bottom of the still at certain inlet water depth has been achieved. The experimental results show that the still productivity could be influenced by the basin depth by up to 40.6 % when varying water depth from 1 to 5 cm, The freshwater production from the pyramid solar still was 1230.5, 1045, 998, 901, and 731 mL for the water depth from 1 to 5 cm, respectively. Moreover, it was found that productivity increased by 7.5 % when fins were used at the bottom of the pyramid solar still. In addition, the results showed that the still productivity could be influenced by varying inlet water temperature to 15.3 % and 21.2 % when varying the inlet water temperature from 30 °C to 40 °C and 50 °C, respectively.

Sunlight concentration effect analysis of lenses on single-slope solar still

2018 ◽  
Vol 18 (6) ◽  
pp. 1888-1896
Author(s):  
Shibiao Fang ◽  
Wenrong Tu ◽  
Lili Zhu ◽  
Zhilin Sun
Keyword(s):  
Experimental Study ◽  
Water Depth ◽  
Performance Monitoring ◽  
Concentration Effect ◽  
Solar Still ◽  
Effect Analysis ◽  
Loss Model ◽  
Side Walls

Abstract In this paper, an experimental study has been conducted to monitor the productivity of a single-slope active solar still with three lenses and one mirror. The lenses and the mirror were proposed to be attached to a basin-type single-slope active solar still because of their concentration effect for sunlight. After 24-hour performance monitoring, a higher yield was observed in the new style of solar still as compared with the conventional single-slope still. The lenses refract and aggregate the sunlight from three side walls, and one mirror set on the back of the evaporator can avoid sunlight loss. Model-3 with three lenses produced about a 21.03% yield increment, and an extra 8.77% yield was observed by adding one mirror in Model-4. The yield of the proposed solar still could reach the maximum freshwater production through Model-4 (adding three lenses and one mirror) of 0.8 kg/m2.d on 1/8/2016. Compared with the traditional still, there was a 29.8% increment in yield through Model-4 at 0.15 m water depth, and the production reached its peak at about 16:00.

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