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Theoretical study of a double-slope solar still with solar air heater condenser

Mechanical Engineering Department, College of Engineering, Jouf University, Sakaka, Al-Jouf, Saudi Arabia

Received: 25 Apr 2023; Revised: 14 Aug 2023; Accepted: 5 Sep 2023; Available online: 14 Sep 2023; Published: 1 Nov 2023.
Editor(s): H Hadiyanto
Open Access Copyright (c) 2023 The Author(s). Published by Centre of Biomass and Renewable Energy (CBIORE)
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Despite their limited water production and efficiency, double-slope solar stills are an appropriate solution for water scarcity in hot arid regions. Numerous studies have focused on enhancing the effectiveness of double-slope solar stills. In this context, this study introduces a double-slope solar with a solar air heater condenser (DSSS-SAHC). The back cover of a conventional double-slope solar still was replaced by a glass air heater in order to recover the still’s thermal losses in heating air. The transient performance of the DSSS-SAHC was investigated numerically under real weather conditions and compared to the performance of a conventional double-slope solar still (CDSSS) with the same aspects. The impact of various weather and operation factors on the DSSS-SAHC performance was investigated at air flows of 0.01 and 0.1 kg/s to account for both natural and forced air circulation, respectively. The results revealed an increase of about 15% and 6% in the thermal efficiency of the DSSS-SAHC over that of the CDSSS, respectively, at air flows of 0.1 and 0.01 kg/s despite the DSSS-SAHC distillate was insignificantly greater than that of the CDSSS at both air flows. In addition, the water distillate of the DSSS-SAHC increased as the solar irradiance increased, the ambient wind and ambient temperature had contrary effects on the efficiency, and the initial saline water level had a negligible impact on the overall performance

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Keywords: Double-slope; Solar still; Solar air heater; Thermal performance
Funding: Jouf University

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  1. Abdullah, A.S., Alarjani, A., Abou Al-sood, M.M., Omara, Z.M., Kabeel, A.E. & Essa, F.A. (2019). Rotating-wick solar still with mended evaporation technics: Experimental approach, Alexandria Engineering Journal, 58, 1449-1459.
  2. Agrawal, R. & Singh, K.D.P. (2021). Performance evaluation of double slope solar still augmented with binary eutectic phase change material and steel wool fibre, Sustain. Energy Technol. Assessments, 48, 101597.
  3. Ahmed, H.M., Alshutal, F.S. & Ghaleb, I.G. (2014). Impact of Different Configurations on Solar Still Productivity, J. Adv. Sci. Eng. Res., 4(2), 118-126.
  4. Alwan, N.T., Shcheklein, S.E. & Ali O.M. (2020). Experimental investigation of modified solar still integrated with solar collector, Case Studies in Thermal Engineering, 19, 100614.
  5. Belhadj, M.M., Bouguettaia, H., Marif, Y. & Zerrouki, M. (2015). Numerical study of a double-slope solar still coupled with capillary film condenser in south Algeria, Energy Conversion and Management, 94, 245–252.
  6. Castillo-Téllez, M., Pilatowsky-Figueroa, I., Sánchez-Juárez, Á. & Fernández-Zayas, J. L. (2015). Experimental study on the air velocity effect on the efficiency and fresh water production in a forced convective double slope solar still, Applied Thermal Engineering, 75, 1192-1200.
  7. Dwivedi, V.K. & Tiwari, G.N. (2010). Experimental validation of thermal model of a double slope active solar still under natural circulation mode, Desalination, 250, 49-55.
  8. Elgendi, M., Selim, M.Y.E., Aldhaheri, A., Alshehhi, W., Almarshoodi, H. & Alhefeiti, A. (2022). Design procedures for a passive pyramid solar still with an automatic feed water system, Alexandria Engineering Journal, 61, 6419-6431.
  9. Elmaadawy, K., Kandeal, A.W., Khalil, A., Elkadeem, M.R., Liu, B., Sharshir, S.W. (2021). Performance improvement of double slope solar still via combinations of low cost materials integrated with glass cooling, Desalination, 500, 114856.
  10. El-Maghlany, W.M. (2015). An approach to optimization of double slope solar still geometry for maximum collected solar energy, Alexandria Engineering Journal, 54(4), 823-828.
  11. Essa, F.A., Abd Elaziz, M. & Elsheikh, A.H. (2020). An enhanced productivity prediction model of active solar still using artificial neural network and Harris Hawks optimizer, Applied Thermal Engineering, 170, 115020.
  12. Fallahzadeh, R., Aref, L., Avargani, V.M. & Gholamiarjenaki, N. (2020). An experimental investigation on the performance of a new portable active bubble basin solar still, Applied Thermal Engineering, 181, 115918.
  13. Fath, H.E.S. & Hosny, H.M. (2002). Thermal performance of a single-sloped basin still with an inherent built-in additional condenser, Desalination, 142, 19-27.
  14. Gnanaraj, S.J.P. & Velmurugan, V. (2022). Experimental investigation on the performance of modified single basin double slope solar stills, International Journal of Ambient Energy, 43(1), 206-215.
  15. Hedayati-Mehdiabadi, E., Sarhaddi, F. & Sobhnamayan, F. (2020). Exergy performance evaluation of a basin-type double-slope solar still equipped with phase-change material and PV/T collector, Renew. Energy, 145, 2409-2425.
  16. Hussen, H.M., Younes, M.M., Alawee, W.H., Abdullah, A.S., Mohammed, S.A., Atteya, T.E.M., Abbas, F. & Omara, Z.M. (2023). An experimental comparison study between four different designs of solar stills, Case Studies in Thermal Engineering, 44, 102841.
  17. Jani, H.K. & Modi, K.V. (2019). Experimental performance evaluation of single basin dual slope solar still with circular and square cross-sectional hollow fins. Sol. Energy, 179, 186-194.
  18. Kabeel, A.E., Harby, K., Abdelgaied, M. & Eisa, A. (2020). Performance of the modified tubular solar still integrated with cylindrical parabolic concentrators, Solar Energy, 204, 181-189.
  19. Kaviti, A.K., Naike, V.R., Ram, A.S. & Thakur, A.K. (2022). Energy and exergy analysis of a truncated and parabolic finned double slope solar stills, International Journal of Ambient Energy, 43(1), 6210-6223.
  20. Kumbhar, S.V. (2019). Double slope solar still distillate output data set for conventional still and still with or without reflectors and PCM using high TDS water samples, Data in brief, 24, 103852.
  21. Maheswari, K.S., Mayandi, K., Joe Patrick Gnanaraj, S. & Appadurai, M. (2022). Effect of transparent glass cover material on double slope solar still productivity, Mater. Today: Proc., 62(8), 5415-5419.
  22. Mevada, D., Panchal, H., Ahmadein, M., Zayed, M.E., Alsaleh, N.A., Djuansjah, J., Moustafa, E.B., Elsheikh, A.H. & Sadasivuni, K.K. (2022). Investigation and performance analysis of solar still with energy storage materials: An energy- exergy efficiency analysis, Case Studies in Thermal Engineering, 29, 101687.
  23. Modi, K. & Jani, H. (2021). Experimental and theoretical assessment of dual-slope single-basin solar still with the circular cross-sectional hollow-fins. Cleaner Engineering and Technology, 4, 100231.
  24. Modi, K.V., Nayi, K.H. & Sharma, S.S. (2020). Influence of water mass on the performance of spherical basin solar still integrated with parabolic reflector, Groundwater for Sustainable Development, 10, 100299.
  25. Modi, K.V., Patel, U.N., Patel, S.J., Patel, J.N. & Patel, S.R. (2022).Efficacy of partially and fully submerged circular cross-section metal hollow-fins and black cotton cloth wick-segments on a single-basin dual-slope solar still, Journal of Cleaner Production, 344, 131059.
  26. Morad, M.M., El-Maghawry, H.A.M. & Wasfy, K.I. (2015). Improving the double slope solar still performance by using flat-plate solar collector and cooling glass cover, Desalination, 373, 1-9.
  27. Murugavel, K.K. & Srithar, K. (2011). Performance study on basin type double slope solar still with different wick materials and minimum mass of water, Renewable Energy, 36, 612-620.
  28. Murugavel, K.K., Chockalingam, Kn.K.S.K. & Srithar, K. (2008). An experimental study on single basin double slope simulation solar still with thin layer of water in the basin, Desalination, 220, 687-693.
  29. Murugavel, K.K., Sivakumar, S., Ahamed, R.J., Chockalingam, S.K. & Srithar, K. (2010). Single basin double slope solar still with minimum basin depth and energy storing materials, Appl. Energy, 87, 514-523.
  30. Patel, S.K., Kumar, B., Pal, P., Dev, R. & Singh, D. (2020). Production of potable water from Gomti River by using modified double slope solar still with external mounted reflectors, Solar Energy, 209, 576-589.
  31. Raihananda, F.A., Philander, E., Lauvandy, A.F., Soelaiman, T.A.F., Budiman, B.A., Juangsa, F.B. & Sambegoro, P. (2021). Low-cost floating solar still for developing countries: Prototyping and heat-mass transfer analysis, Results in Engineering, 12, 100300.
  32. Rajaseenivasan, T. & Murugavel, K. K. (2013). Theoretical and experimental investigation on double basin double slope solar still, Desalination, 319, 25-32.
  33. Sahota, L. & Tiwari, G.N. (2016). Effect of nanofluids on the performance of passive double slope solar still: A comparative study using characteristic curve, Desalination, 388, 9-21.
  34. Sathyamurthy, R., Kabeel, A.E., Balasubramanian, M., Devarajan, M., Sharshir, S.W. & Manokar, A.M. (2020). Experimental study on enhancing the yield from stepped solar still coated using fumed silica nanoparticle in black paint, Materials Letters, 272, 127873.
  35. Sharshir, S.W., Eltawil, M.A., Algazzar, A.M., Sathyamurthy, R. & Kandeal, A.W. (2020). Performance enhancement of stepped double slope solar still by using nanoparticles and linen wicks: Energy, exergy and economic analysis, Applied Thermal Engineering, 174, 115278.
  36. Taamneh, Y., Manokar, A.M., Thalib, M.M., Kabeel, A.E., Sathyamurthy, R. & Chamkha, A.J. (2020). Extraction of drinking water from modified inclined solar still incorporated with spiral tube solar water heater, Journal of Water Process Engineering, 38, 101613.
  37. Tabrizi, F.F., Dashtban, M., Moghaddam, H. & Razzaghi, K. (2010). Effect of water flow rate on internal heat and mass transfer and daily productivity of a weir-type cascade solar still, Desalination, 160, 239-427.
  38. Tiwari, G.N., Mukherjee, K., Ashok, K.R. & Yadav, Y.P. (1986). Comparison of various designs of solar stills, Desalination, 60, 191-202.
  39. Tuly, S.S., Rahman, M.S., Sarker, M.R.I. & Beg, R.A. (2021). Combined influence of fin, phase change material, wick, and external condenser on the thermal performance of a double slope solar still. J. Clean. Prod., 287, 125458.
  40. Zayed, M.E., Kamal, A., Diab, M.R., Essa, F.A., Muskens, O.L., Fujii, M. & Elsheikh, A.H. (2023). Novel Design of Double Slope Solar Distiller with Prismatic Absorber Basin, Linen Wicks, and Dual Parallel Spraying Nozzles: Experimental Investigation and Energic–Exergic-Economic Analyses, Water, 15, 610.

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