Review on performance assessment of solar stills using computational fluid dynamics (CFD)

Purnachandrakumar, Danduprolu; Mittal, Gaurav; Sharma, Ram Kumar; Singh, D. P.; Tiwari, Sumit; Sinhmar, Harender

doi:10.1007/s11356-022-18952-2

Cited by 21 publications

(6 citation statements)

References 64 publications

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“…It was found that due to enhancement of the thermophysical properties of the water by adding the nanoparticles, the heat and mass transfer are considerably improved. More details of the numerical methods used to study the solar stills can be found in the review paper of Purnachandrakumar et al [22] Based on the above presented literature review, it is clear that the 3D studies related to the double diffusive natural convection in solar stills are very limited and consider relatively simple geometries. Thus, the present study focuses on the numerical study of the 3D double diffusive convection in a 3D trapezoidal cavity equipped with conductive fins.…”

Section: Physical Model Assumptions and Governing Equationsmentioning

confidence: 99%

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Numerical Investigation of the Double Diffusive Convection in 3D Trapezoidal Solar Still Equipped with Conductive Fins

et al. 2022

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In this paper a numerical investigation on the double diffusive natural convection in a finned solar still is performed using the finite volume method. The 3D vector potential-vorticity formalism is used to eliminate the gradient pressure terms and due to the complex shape of the cavity the blocked-off-region method is adopted. After getting the dimensionless governing equations, they are written in a generalised form then discretised. The effects of the buoyancy ratio, conductivity ratio and Rayleigh number of the flow structure, temperature field and heat and mass transfer are studied. The results show that the increase of conductivity ratio and Rayleigh number leads to an enhancement of the heat and mass transfer.

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Section: Physical Model Assumptions and Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Double Diffusive Convection in 3D Trapezoidal Solar Still Equipped with Conductive Fins

et al. 2022

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“…Correct evaluation of the distiller's the rate of heat loss is essential in modeling and simulating solar distillers. 23 Since the distiller's thermal behavior and productivity are highly related to wind convection heat transfer coefficient. Therefore, further research efforts are required in this field, which justifies the originality and importance of the proposed work.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, each configuration must have its proper correlation for heat loss estimation through the still's glass cover. Correct evaluation of the distiller's the rate of heat loss is essential in modeling and simulating solar distillers 23 . Since the distiller's thermal behavior and productivity are highly related to wind convection heat transfer coefficient.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of the wind convection heat transfer on the glass cover of the single‐slope solar still

Rahmani,

Chouaf,

Bouzid

et al. 2024

Heat Trans

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Accurate evaluation of the wind convection heat transfer coefficient (hw) for solar‐based systems is essential, especially for solar desalination systems. Thermal behavior and productivity of solar stills are highly affected by the external heat loss through the glass cover. This paper describes a new experimental approach to estimate the hw on the glass cover of the conventional single‐slope solar distiller (CSS). Indoor experiments have been conducted under steady‐state conditions for a wind speed between 0 and 3 m/s. The hw has been evaluated through an energy balance performed on the distiller's glass cover. The results showed that increasing the wind speed increases the hw (from 5.64 to 31.57 W/m2 K) and enhances the distillation rate (from 5.28 to 7.61 mL/min). A new relationship for the hw was proposed for the CSS and compared with the experimental data available in the literature. The comparison shows that the obtained results are close to the data from solar systems, with a deviation ranging from 27.4% to 37%. However, a significant deviation was obtained with earlier models derived from flat plates (from 29.5% to 59%).

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“…Danduprolu et al ( 2022 ) presented a comprehensive review of the importance of the CFD tool in solar still analysis, performance estimation, and design improvements. Various approaches’ assumptions and governing equations had been presented.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic and enviroeconomic evaluations of conventional solar still using PCM and electric heater powered by solar energy: an experimental study

Abdel-Aziz

Mansour

Dawood

et al. 2023

Environ Sci Pollut Res

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Solar stills are used in distant and arid areas to convert brackish or salty water into potable water fit for human use in a simple, affordable, and effective manner. Even when PCM materials are used, typical solar systems still have minimal production per day. In this study, experimental tests were carried out in order to increase the performance of a single-slope solar still combined with PCM material (paraffin wax) and a solar-powered electric heater. Two identical single-slope solar stills were designed, fabricated, and tested under the same climatic conditions during the summer and spring seasons of 2021 in Al-Arish, Egypt. The first is a conventional solar still (CVSS), and the other is also a conventional still but with PCM and an electric heater (CVSSWPCM). Several parameters were measured during the experiments, including sun intensity, meteorological aspects, cumulative freshwater production, average glass, and water temperatures and PCM temperature. The improved solar still was evaluated at different operating temperatures and was compared to the conventional traditional one. There were four cases studied: one case without a heater (paraffin wax only) and three other cases with a heater operating at 58 °C, 60 °C, and 65 °C, respectively. The experimental results revealed that activating the heater inside the paraffin wax increased daily production (i) in the spring by 2.38, 2.66, and 3.1 times and (ii) and in the summer by 2.2, 2.39, and 2.67 times at the three above-mentioned temperatures respectively (when compared to the traditional still). In addition, the maximum rate of daily freshwater production was achieved at paraffin wax temperature of 65 °C in both spring and summer (Case 5). Finally, the economic evaluation of the modified solar still was carried out according to cost per litre. The modified solar still with a heater operating at 65 °C has a higher exergoeconomic value than the traditional one. The maximum CO2 mitigation in cases 1 and 5 was approximately 28 tons and 160 tons, respectively.

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Review on performance assessment of solar stills using computational fluid dynamics (CFD)

Cited by 21 publications

References 64 publications

Numerical Investigation of the Double Diffusive Convection in 3D Trapezoidal Solar Still Equipped with Conductive Fins

Numerical Investigation of the Double Diffusive Convection in 3D Trapezoidal Solar Still Equipped with Conductive Fins

Experimental evaluation of the wind convection heat transfer on the glass cover of the single‐slope solar still

Exergoeconomic and enviroeconomic evaluations of conventional solar still using PCM and electric heater powered by solar energy: an experimental study

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