Experimental and numerical performance analysis and optimization of single slope, double slope and pyramidal shaped solar stills

Altarawneh, Ibrahem; Rawadieh, Saleh; Batiha, Mohammad A.; Al-Makhadmeh, Leema A.; Alrowwad, Sultan M.; Tarawneh, Muafag

doi:10.1016/j.desal.2017.09.023

Cited by 63 publications

(17 citation statements)

References 28 publications

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“…SS may have various shapes, which also affects productivity. For example, Altarawneh et al [14] studied the productivity of single slope, double slope, and pyramidal-shaped SS. It was found that the productivity of single slope SS was greater than the productivity of the double slope and pyramidal-shaped SS.…”

Section: Introductionmentioning

confidence: 99%

“…The convective heat transfer coefficient between the outer glass cover and the ambient air takes into account only natural convection because the experiments were carried out in a laboratory, and there was no wind. Therefore, the coefficient h c,go-air was calculated from Equation ( 14 1.382+|cosθ| f or T go < T air (14) The mass flow rate of the evaporated water can be written as [38]:…”

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confidence: 99%

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Experimental Validation of the Thermal Processes Modeling in a Solar Still

et al. 2021

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Passive solar distillation is cheap and energy-efficient technology but its main disadvantage is low productivity. Thus, there are many attempts to improve solar stills’ productivity, and one of them is changing the mass of the water. This paper presents the results of validation of the thermal processes modeling in a solar still (SS). In order to validate the model, the experimental studies were conducted in a laboratory to ensure uniform climatic conditions. The studies were carried out for 10 kg, 15 kg, and 20 kg of water under three different solar irradiance conditions. The results show that 10 kg and 20 kg of water ensure the highest and the lowest daily productivity, respectively, independently of solar irradiance. When the water mass is 10 kg, the solar still’s productivity is 800 mL/m2/day, 3732 mL/m2/day, and 9392 mL/m2/day for low, medium, and high solar irradiance, respectively. Additionally, it is found that reducing the water mass from 20 kg to 10 kg can improve solar still’s productivity by a maximum value of 21.6%, which is obtained for low solar irradiance. The proposed mathematical model allows predicting the performance of the SS. The results of the theoretical calculations are in good agreement with the results of the experiments. The minimum and maximum deviation between the actual and theoretical productivity of the SS is 1.1% and 8.3%, respectively.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Experimental Validation of the Thermal Processes Modeling in a Solar Still

et al. 2021

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“…In this view, solar stills have attracted the interest of many in the field of solar thermal desalination. Improvement in designs of conventional single/double sloped solar stills have been suggested using stepped solar stills , single and double effect , wick materials , new conceptual designs of passive solar stills have been proposed as well as methods to improvise the performance of solar stills through better design of components and combination with other devices (known as active solar stills) a reflector , solar collector , and concentrator PV/T desalination and so on have been proposed in recent years. These approaches lead either led to optimization of design or an increase in input energy to the system thereby increasing the performance of the solar still.…”

Section: Introductionmentioning

confidence: 99%

Effect of specific height on productivity and thermal efficiency of a solar still: An experimental approach under indoor environment

Jamil¹,

Akhtar²

2019

Env Prog and Sustain Energy

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A novel experimental approach is presented where studies have been conducted on a solar still at four specific heights in the range of 0.266–0.341 m (in steps of 0.025 m) keeping other dimensions constant. Performance of solar still is established under indoor environment to suppress meteorological factors. Uniform heat was supplied to the solar still through flat plate‐type electrical heaters. For each specific height, the performance of the solar still was evaluated at five heat fluxes (600–1000 W/m2 in steps of 100 W). Performance of solar still at different specific heights was compared in terms of operating temperatures, productivity, and efficiency. It was found that reduction in specific height enhances distillate productivity as well as thermal efficiency of the solar still due to reduction in cavity volume and an increase in average operating temperature. An increase of in daily distillate yield of 89.44% (at 600 W/m2), 56.07% (at 700 W/m2), 28.50% (at 800 W/m2), 38.60% (at 900 W/m2), and 37.38% (at 1000 W/m2) between Case 1 to Case 4 was observed. Further, between Case 1 and Case 4, the thermal efficiency increased from 27.29 to 46.18%, 32.73 to 51.06%, 36.82 to 52.17%, 41.25 to 56.79%, and 42.55 to 57.50% at 600, 700, 800, 900, and 1000 W, respectively. Results demonstrate that for a particular specific height the total daily productivity increases linearly with heat flux. Correlation for estimating thermal efficiency of solar still is proposed in terms of the aspect ratio and input power. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13227, 2019

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“…Also, there is increase in yield by 16.76% for asymmetric still with south-north orientation com-pared to that of east-west orientation. IbrahemAltarawneh et al [22] investigated single slope, double slope and pyramid stills and found that double slope still (β = 35°) with south orientation performed slightly better than other stills in summer.…”

Section: Introductionmentioning

confidence: 99%

Effect of orientation on the yield of low cost solar stills with coco peat and charcoal as an absorber material

Balu¹,

Naveen²,

Premalatha³

2019

DWT

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Effect of the orientation on the yield of the stills has been discussed in this experimental work. Two identical modified stills S1 and S2 fabricated, each with 0.5 m 2 of basin area. Stills had transparent glass walls with trough to collect the condensate from the walls. Mixture of highly porous coco peat and charcoal were used as basin material. Still S1 had North-South (N-S) orientation with cover slope due south whereas still S2 had East-West (E-W) orientation with cover slope due east. Experiments were conducted by changing the water quantity in the solar stills ranging from 5 to 10 kg. Maximum distillate output of 5.67 L/m 2-d was obtained for S1, whereas it was 5.45 L/m 2-d for S2 for an average solar radiation intensity of 695 W/m 2 (25 MJ/m 2-d). The increase in the yield of S1 over S2 due to the orientation was found to be in the range of 0% to 11%.Use of transparent walls increased the condenser area by 78.4%.The distillate water cost per litre was estimated as Rs. 0.86 (0.013 US$) and Rs.0.90 (0.014 US$) for S1 and S2 respectively. Energy payback time (EPT) for stills S1 and S2 was estimated as 4 months.

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Experimental and numerical performance analysis and optimization of single slope, double slope and pyramidal shaped solar stills

Cited by 63 publications

References 28 publications

Experimental Validation of the Thermal Processes Modeling in a Solar Still

Experimental Validation of the Thermal Processes Modeling in a Solar Still

Effect of specific height on productivity and thermal efficiency of a solar still: An experimental approach under indoor environment

Effect of orientation on the yield of low cost solar stills with coco peat and charcoal as an absorber material

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