Numerical investigation of the influence of the geometrical shape of the absorber of a single-slope solar desalination device

Document Type : Original Article

Authors

Vali Kalantar

Mahdi Abbasi

Department of Mechanical Engineering, Yazd University, Yazd, Iran.

10.22067/jacsm.2024.83738.1195

Abstract

Today, the use of solar water softeners to produce fresh water has become more important than before and the attention of many people and industries has been drawn to this solar system. Out of about 22 million cubic meters of fresh water produced daily, less than 1% of it is produced using solar energy. The production of fresh and pure water using common methods such as desalination and reverse osmosis is energy-intensive and these methods rely on fossil fuels, but the use of solar water desalination is not only low-cost and It is economical, but it does not need fossil fuel and conserves energy resources.In this study, the absorber of a single-slope solar desalination plant was numerically evaluated in eleven different geometries with the same conditions. The purpose of this research is to find the best way to design the absorber plate in solar water desalination. The result showed that the best mode for making a simple solar water softener is mode (C), in this mode, the temperature of the absorber reaches 349 K due to the intensity of solar radiation of 750 watts per square meter, and the amount of distilled water compared to other There are more states, and then geometry (b) has the best performance.

Keywords

Solar desalination

absorbent form

Solar energy

convection heat transfer

radiation heat transfer

Subjects

• Heat transfer

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References

[1] E. Jahanshahi, A. Hosseinkhani, and S. M. H. Moahmmadi, "Manufacturing and simulation of a solar humidification-dehumidification desalination system," Modares Mechanical Engineering, vol. 16, no. 12, pp. 239-248, 2017.

[2] H. M. Qiblawey, and F. Banat, "Solar thermal desalination technologies," Desalination, vol. 220, no. 1-3, pp. 633-644, 2008. https://doi.org/10.1016/j.desal.2007.01.059

[3] N. Rahbar, and J. A. Esfahani, "Productivity estimation of a single-slope solar still: Theoretical and numerical analysis," Energy, vol. 49, pp. 289-297, 2013. https://doi.org/10.1016/j.energy.2012.10.023

[4] C. Sonawane, A. J. Alrubaie, H. Panchal, A. J. Chamkha, M. M. Jaber, A. D. Oza, S. Zahmatkesh, D. D. Burduhos-Nergis, and D. P. Burduhos-Nergis, "Investigation on the impact of different absorber materials in solar still using CFD simulation—economic and environmental analysis," Water, vol. 14, no. 19, pp. 3031, 2022. https://doi.org/10.3390/w14193031

[5] M. A. Almeshaal, and C. Maatki, "Numerical study of inclination effect of the floating solar still fitted with a baffle in 3D double diffusive natural convection," Processes, vol. 10, no. 8, pp. 1607, 2022. https://doi.org/10.3390/pr10081607

[6] G. Mittal, "An unsteady CFD modelling of a single slope solar still," Materials Today: Proceedings, vol. 46, pp. 10991-10995, 2021. https://doi.org/10.1016/j.matpr.2021.02.090

[7] O. Prakash, A. Ahmad, A. Kumar, S. M. Hasnain, and G. Kumar, "Comprehensive analysis of design software application in solar distillation units," Materials Science for Energy Technologies, vol. 5, pp. 171-180, 2022. https://doi.org/10.1016/j.mset.2022.01.005

[8] M. Keshtkar, M. Eslami, and K. Jafarpur, "A novel procedure for transient CFD modeling of basin solar stills: Coupling of species and energy equations," Desalination, vol. 481, pp. 114350, 2020. https://doi.org/10.1016/j.desal.2020.114350

[9] S. El-Sebaey, M. Ellman, A. Hegazy, and T. Ghonim, "Experimental analysis and CFD modeling for conventional basin-type solar still," Energies, vol. 13, no. 21, pp. 5734, 2020. https://doi.org/10.3390/en13215734

[10] S. K. Suraparaju, R. Dhanusuraman, and S. K. Natarajan, "Performance evaluation of single slope solar still with novel pond fibres," Process Safety and Environmental Protection, vol. 154, pp. 142-154, 2021. https://doi.org/10.1016/j.psep.2021.08.011

[11] A. K. Singh, D. B. Singh, V. K. Dwivedi, G. N. Tiwari, and A. Gupta, "Water purification using solar still with/without nano-fluid: a review," Materials Today: Proceedings, vol. 21, pp. 1700-1706, 2020. https://doi.org/10.1016/j.matpr.2019.12.025

[12] E. Radomska, Ł. Mika, K. Sztekler, W. Kalawa, Ł. Lis, K. Pielichowska, M. Szumera, and P. Rutkowski, "Experimental and theoretical investigation of single-slope passive solar still with phase-change materials," Energies, vol. 16, no. 3, pp. 1188, 2023. https://doi.org/10.3390/en16031188

[13] K. Athamena, J. F. Sini, J. M. Rosant, and J. Guilhot, "Numerical coupling model to compute the microclimate parameters inside a street canyon: Part I: methodology and experimental validation of surface temperature," Solar Energy, vol. 174, pp. 1237-1251, 2018. https://doi.org/10.1016/j.solener.2018.04.059

[14] M. Jahanpanah, S. J. Sadatinejad, A. Kasaeian, M. H. Jahangir, and H. Sarrafha, "Experimental investigation of the effects of low-temperature phase change material on single-slope solar still," Desalination, vol. 499, pp. 114799, 2021. https://doi.org/10.1016/j.desal.2020.114799

[15] S. Kumar, and O. Prakash, "Improving the single-slope solar still performance using solar air heater with phase change materials," Energies, vol. 15, no. 21, pp. 8013, 2022. https://doi.org/10.3390/en15218013

[16] W. H. Alawee, A. S. Abdullah, S. A. Mohammed, A. Majdi, Z. M. Omara, and M. M. Younes, "Testing a single slope solar still with copper heating coil, external condenser, and phase change material," Journal of Energy Storage, vol. 56, pp. 106030, 2022. https://doi.org/10.1016/j.est.2022.106030

[17] V. P. Katekar, and S. S. Deshmukh, "A review of the use of phase change materials on performance of solar stills," Journal of Energy Storage, vol. 30, pp. 101398, 2020. https://doi.org/10.1016/j.est.2020.101398

[18] W. I. Aly, M. A. Tolba, and M. Abdelmagied, "Experimental investigation and performance evaluation of an oval tubular solar still with phase change material," Applied Thermal Engineering, vol. 221, pp. 119628, 2023. https://doi.org/10.1016/j.applthermaleng.2022.119628

[19] S. Shoeibi, N. Rahbar, A. A. Esfahlani, and H. Kargarsharifabad, "Energy matrices, exergoeconomic and enviroeconomic analysis of air-cooled and water-cooled solar still: Experimental investigation and numerical simulation," Renewable Energy, vol. 171, pp. 227-244, 2021. https://doi.org/10.1016/j.renene.2021.02.081

[20] S. Kumar, A. Dubey, and G. N. Tiwari, "A solar still augmented with an evacuated tube collector in forced mode," Desalination, vol. 347, pp. 15-24, 2014. https://doi.org/10.1016/j.desal.2014.05.019