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Experimental and optimizable analysis of solar distiller via solar-driven rotating porous material and evacuated tubes

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  • Metwally, Hanaa A.
  • Khalaf-Allah, Reda A.
  • Easa, Ammar S.
  • Mohamed, M.A.

Abstract

The paucity of drinkable water is a pervasive global concern that is causing distress to governments worldwide. Consequently, humanity pursued various approaches to desalinating seawater and water from the oceans. Multiple techniques exist for desalinating saltwater. Solar-powered desalination has emerged as a promising solution to the global water scarcity crisis. These devices are especially beneficial in isolated regions that lack conventional energy sources but have ample solar energy supply. This work involved an experimental analysis utilizing conventional solar stills (CSS) and modified solar stills (MSS). Twin solar stills with a single basin and a single slope were built with the exact dimensions. The MSS system incorporates evacuated tubes and a revolving porous material. The photovoltaic panels fuel the electric motor that drives the rotating porous material. This motor employs a chain and gear system to move a porous material. An experiment was conducted to investigate the impact of water level, the presence of a rotating porous material (painted and unpainted), and the number of rotating porous materials on the system's performance. Various configurations were tested, including different numbers of porous materials (3, 6, 9, 12, and 15) and rotation speeds (0 rpm, 25 rpm, and 50 rpm). Combining the evacuated tube and rotating porous material improves heat transfer, substantially improving water productivity by facilitating effective evaporation. An experiment was conducted to evaluate the efficiency of an MSS with a CSS in terms of cost and performance. The test results indicate that implementing the MSS led to a substantial 130 % increase in production output. Additionally, the price per liter of the final product, MSS, was determined to be $0.0113.

Suggested Citation

  • Metwally, Hanaa A. & Khalaf-Allah, Reda A. & Easa, Ammar S. & Mohamed, M.A., 2026. "Experimental and optimizable analysis of solar distiller via solar-driven rotating porous material and evacuated tubes," Renewable Energy, Elsevier, vol. 256(PI).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pi:s0960148125023432
    DOI: 10.1016/j.renene.2025.124679
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    References listed on IDEAS

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    1. Dumka, Pankaj & Mishra, Dhananjay R., 2020. "Performance evaluation of single slope solar still augmented with the ultrasonic fogger," Energy, Elsevier, vol. 190(C).
    2. Ahmed, Mohamed M.Z. & Alshammari, Fuhaid & Abdullah, A.S. & Elashmawy, Mohamed, 2021. "Experimental investigation of a low cost inclined wick solar still with forced continuous flow," Renewable Energy, Elsevier, vol. 179(C), pages 319-326.
    3. Akkala, Siva Ram & Kaviti, Ajay Kumar & ArunKumar, T. & Sikarwar, Vineet Singh, 2021. "Progress on suspended nanostructured engineering materials powered solar distillation- a review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    4. Khalaf-Allah, Reda A. & Abdelaziz, Gamal B. & Kandel, Mohamed G. & Easa, Ammar S., 2022. "Development of a centrifugal sprayer-based solar HDH desalination unit with a variety of sprinkler rotational speeds and droplet slot distributions," Renewable Energy, Elsevier, vol. 190(C), pages 1041-1054.
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