scholarly journals Productivity enhancement of stepped solar still: Performance analysis

2008 ◽  
Vol 12 (3) ◽  
pp. 153-163 ◽  
Author(s):  
V. Velmurugan ◽  
Senthil Kumaran ◽  
Niranjan Prabhu ◽  
K. Srithar
Keyword(s):  
Performance Analysis ◽  
Economic Analysis ◽  
Payback Period ◽  
Water Production ◽  
Solar Still ◽  
Constant Depth ◽  
Minimum Depth ◽  
Daily Water ◽  
Experimental Analyses ◽  
Theoretical Results

Maintaining minimum depth in conventional basin type solar still is difficult, as the area is large. However this can be achieved in stepped solar still in which the area of the basin is minimized by having small trays. Very few works have been carried so far in stepped solar still and constant depth trays are used in the basin plate. In this work, a stepped still with two different depth of trays are used. The basin plate contains twenty five trays with 10 mm depth and twenty five trays with 5 mm depth. To improve the productivity, experiments were carried out by integrating small fins in basin plate and adding sponges in the trays. Theoretical and experimental analyses are made for fin type, sponge type, and combination of fin and sponge type stepped solar still. When the fin and sponge type stepped solar is used, the average daily water production has been found to be 80% higher than ordinary single basin solar still. The theoretical results agree well with the experimental. Also an economic analysis was made. The payback period of this setup is 400 days.

Sustainable Agriculture Irrigation System Using a Novel Solar Still Design With a Compound Parabolic Concentrator Reflector

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Honglie Ye ◽  
Yanjie Zheng ◽  
Hongfei Zheng ◽  
Shen Liang
Keyword(s):  
Operating Temperature ◽  
Weather Conditions ◽  
Production Performance ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Water Production ◽  
Solar Still ◽  
Compound Parabolic Concentrator ◽  
Agriculture Irrigation ◽  
Daily Water

Abstract In this paper, a new design of a solar still powered by a compound parabolic concentrator (CPC-SS) for agriculture irrigation is proposed and investigated. The concentrating performance of its concentrator is simulated which is proved that it has a wide focusing angle and the receiving rate is still more than 80% when the incident angle of light reaches to 35 deg. Theoretical calculations show that the daily water production rate per unit area of the solar still can reach 4 kg/m2, which can meet the crop growth needs of 2 m2. The water production performance and operating temperature of the CPC-SS were tested experimentally under actual weather conditions, and the variation curves of system internal working temperature and water production performance with time were given. As the results, in the sunny weather conditions in Beijing in the autumn, the daily water production of the tubular solar still is about 2.03 kg/m2, and the maximum operating temperature in the tube reaches 60 °C. The actual solar energy utilization efficiency can be as high as 22%.

scholarly journals Augmentation of freshwater productivity in single slope solar still using Luffa acutangula fibres

2021 ◽  
Author(s):  
Subbarama Kousik Suraparaju ◽  
Sendhil Kumar Natarajan
Keyword(s):  
Economic Analysis ◽  
Porous Structure ◽  
Surface Area ◽  
Thermal Efficiency ◽  
Payback Period ◽  
Solar Still ◽  
Wet Surface ◽  
The Cost ◽  
Luffa Acutangula

Abstract The prime intention of the current research is to enhance the freshwater productivity of the solar still (SS) by using Luffa acutangula fibres (LAF). The dried LA fibres were introduced into the absorber basin of solar still to enhance the wet surface area through its porous structure that leads to augmented evaporation of water from the absorber basin. The effect of the number of LAF in absorber basin such as 10,13,14,15,16,20 and 25 on freshwater productivity was estimated. The results revealed that SSLAF with 15 fibres in the absorber basin increased the yield by 25.23%. Besides, solar still with 10,13,14,16,20 and 25 fibres in the absorber basin increased the yield by 12.27%, 17.45%, 22.04%, 22.69%, 14.64% and 4.09% respectively when compared to conventional solar still (CSS). The average thermal efficiency of the SSLAF with 15 LAF was increased by 28.35% whereas, for 10,13,14,16,20 and 25 LAF, the average thermal efficiency was increasedby 11.05%, 16.99%, 22.53%, 19.93%, 11.29% and 3.9% respectively when compared to CSS.The economic analysis resulted that the cost per litre freshwater yield from the SSLAF is 22.5% lower than CSS. Also, the payback period of SSLAF is comparatively lesser than that of CSS.

SIMULATION OF DISTILLED WATER PRODUCTION USING A TRIANGULAR SOLAR STILL － IN CASE OF A PAIKGACHA, A COASTAL AREA OF BANGLADESH －

2019 ◽  
Vol 75 (5) ◽  
pp. I_155-I_163
Author(s):  
Shunya KATO ◽  
Hiroaki TERASAKI ◽  
Tomohiro UMEMURA ◽  
Rei TAKAHASHI ◽  
Teruyuki FUKUHARA ◽  
...  
Keyword(s):  
Coastal Area ◽  
Distilled Water ◽  
Water Production ◽  
Solar Still
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