Glass cover inclination angle effect on the radiation shape factor within conventional solar still

2015 ◽  
Vol 57 (38) ◽  
pp. 17722-17730 ◽  
Author(s):  
Wael M. El-Maghlany ◽  
Y.A.F. El-Samadony ◽  
A.E. Kabeel
Keyword(s):  
Inclination Angle ◽  
Shape Factor ◽  
Solar Still ◽  
Glass Cover ◽  
Angle Effect

Effect of absorber plate surface shape and glass cover inclination angle on the performance of a passive solar still

2019 ◽  
Vol 30 (6) ◽  
pp. 3183-3198 ◽  
Author(s):  
Hamid Reza Goshayeshi ◽  
Mohammad Reza Safaei
Keyword(s):  
Inclination Angle ◽  
Water Desalination ◽  
Surface Shape ◽  
Design Parameters ◽  
Solar Still ◽  
Absorber Plate ◽  
Daily Production ◽  
Content Type ◽  
Glass Cover ◽  
Inclination Angles

Purpose Solar-driven water desalination technologies are rapidly developing with various links to other renewable sources. However, the efficiency of such systems severely depends on the design parameters. This paper presents results from an investigation on the effect of the glass cover inclination angle on the performance of two stepped solar still geometries (flat and convex) and the amount of produced distilled water. Design Methodology Approach Studied inclination angles of 25°, 27.5°, 30°, 32.5° and 35° were chosen, while other design parameters were fixed. Findings The investigation showed that the unit with the convex absorber plate had higher average water daily production rate, compared to the output of the flat absorber plate unit. The results also depicted that the inclination angle of the still has a noticeable effect on the performance of solar stills. The value of the critical angle is 32.5°, and the higher inclination angle results in less heat transfer coefficient. This value can be used for design purposes and erases the typical assumption to use lower angles to optimize the productivity of the still. Practical Implications Finally, obtained data were used to correlate the Nusselt number for the flat and convex surfaces with different inclination angles of the glass cover. Originality Value The outcome of this investigation may find applications to develop highly efficient solar stills to secure more drinkable water in warm, dry lands.

scholarly journals A Review of New Solar Still Design Comprising a Five-Sided Glass Cover and Equipped with an External Tank for PCM

2021 ◽  
Vol 877 (1) ◽  
pp. 012038
Author(s):  
Abbas Sahi Shareef ◽  
Hayder Jabbar Kurji ◽  
Hassan Abdulameer Matrood
Keyword(s):  
Melting Point ◽  
Phase Change ◽  
Solar Collector ◽  
Phase Change Materials ◽  
Review Paper ◽  
Pure Water ◽  
Solar Still ◽  
Glass Cover ◽  
Solar Distillation ◽  
Change Material

Abstract Various human activities have led to the consumption of large quantities of pure water, which has led researchers to find efficient and economical methods for desalinating seawater and water containing impurities. In this review paper, solar energy where it is permanent, abundant and environmentally friendly, to produce pure water was discussed using a new solar distillation device, representing the paper’s novelty. The distillation was designed and used in the way led to increase efficiency and improve productivity by adding a solar collector to the system and equipped with a tank containing phase change material (PCM). It has a low melting point and can change the phase by absorbing the system’s latent heat to maintain the system’s temperature. Which contributes to increasing the distillation period even after sunset, thus increasing the daily productivity of freshwater. Using phase change materials will increase distillation hours from (3-4) hours after sunset, increasing the amount of production between (75 - 90) %.

scholarly journals An Experimental Study on Eco-Friendly and Cost-Effective Natural Materials for Productivity Enhancemento Single Slope Solar Still

2021 ◽  
Author(s):  
SENDHIL KUMAR NATARAJAN ◽  
Subbarama Kousik Suraparaju ◽  
Rajvikram Madurai Elavarasan ◽  
Rishi Pugazhendhi ◽  
Eklas Hossain
Keyword(s):  
Rice Straw ◽  
Evaporation Rate ◽  
Low Cost ◽  
Cost Effective ◽  
Solar Still ◽  
Condensation Rate ◽  
Evaporation And Condensation ◽  
Glass Cover ◽  
Materials Used ◽  
The Cost

Abstract The proposed research study aims to improve the productivity of solar still (SS) by using low-cost and eco-friendly materials. The aforementioned objective was achieved by enhancing the evaporation rate of seawater in the absorber basin and the condensation rate over the glass cover of the solar still. In this study, the low-cost and eco-friendly materials used for enhancing the evaporation rate in the solar still were Molasses Powder (MP), Sawdust (SD), Rise Husk (RH). In addition to these materials, Bamboo Straw (BS), Banana Leaf stem (BL), and Rice Straw (RS) were used as absorbing materials over the glass cover for enhancing the condensation rate. The experiments were carried out under similar meteorological conditions and the results of the modified solar still were compared with Conventional Solar Still (CSS). The productivities of CSS, SSMP, SSRH, SSSD, SSBS, SSBL and SSRS were about 2250 mL/m2, 2383 mL/m2, 2467 mL/m2, 3033 mL/m2, 2700 mL/m2, 2683 mL/m2, and 3367 mL/m2 , respectively. The results of the experimental investigation highlighted that the SSSD had a comparatively better evaporation rate and 34.81% higher yield than CSS. Besides, SSRS had a comparatively better condensation rate and a 51.88% higher yield than CSS. Later, the combination of sawdust (SD) and rice straw (RS) was investigated for combined enhancement of evaporation and condensation. The solar still with sawdust and rice straw (SSSDRS) showed a 62.88% improvement in productivity with 3633 mL/m2 when compared to CSS. Also, the economic analysis showed that the cost per litre (CPL) of freshwater obtained from SSSDRS was about ₹ 1.9 ($ 0.025) with a payback period of 4.4 months which was the least when compared to all the considered cases.

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