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The cooling techniques of the solar stills' glass covers – A review

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  • Omara, Z.M.
  • Abdullah, A.S.
  • Kabeel, A.E.
  • Essa, F.A.

Abstract

The productivity of a solar still is influenced by the temperature difference between condensing and evaporating areas. Previous researches determined that increasing the difference between water–glass temperatures enhances the daily productivity of solar stills. To maintain this temperature difference high, fans, condensers, storing materials, reflectors, and the glass cover cooling were utilized. Continuous supply of air or water film over the glass cover leads to diminish the temperature of glass. Also, the cooling water film performs the important role of continuous self-cleaning of the glass cover. The presence of filth and dirt on the glass cover greatly diminishes the efficiency of still. Continuous cleaning of the glass cover keeps high levels of efficacy. In this regard, this paper aims to review the various methods of glass cover cooling used to enhance the performance of the solar stills. The cooling of glass covers is found to achieve a reduction in glass cover temperature in the range of 6–20°C with an improvement in stills efficiency and productivity up to 15.5% and 20% maximum, respectively. It was concluded that for the tubular solar still with cooling air flow of glass cover, the daily productivity improved by approximately 32.8%, and improved by approximately 59% with cooling water flow more than the still without cooling.

Suggested Citation

  • Omara, Z.M. & Abdullah, A.S. & Kabeel, A.E. & Essa, F.A., 2017. "The cooling techniques of the solar stills' glass covers – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 78(C), pages 176-193.
    • Handle: RePEc:eee:rensus:v:78:y:2017:i:c:p:176-193
    DOI: 10.1016/j.rser.2017.04.085
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    References listed on IDEAS

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    Cited by:

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    2. Modi, Kalpesh V. & Nayi, Kuldeep H., 2020. "Efficacy of forced condensation and forced evaporation with thermal energy storage material on square pyramid solar still," Renewable Energy, Elsevier, vol. 153(C), pages 1307-1319.
    3. Amiri, Hossein & Aminy, Mohammad & Lotfi, Marzieh & Jafarbeglo, Behzad, 2021. "Energy and exergy analysis of a new solar still composed of parabolic trough collector with built-in solar still," Renewable Energy, Elsevier, vol. 163(C), pages 465-479.
    4. Shatar, Nursyahirah Mohd & Sabri, Mohd Faizul Mohd & Salleh, Mohd Faiz Mohd & Ani, Mohd Hanafi, 2023. "Investigation on the performance of solar still with thermoelectric cooling system for various cover material," Renewable Energy, Elsevier, vol. 202(C), pages 844-854.
    5. Zhao, Chuang-Yao & Zheng, Chen-Min & Wang, Xiao-Song & Qi, Di & Jiang, Jun-Min & Ji, Wen-Tao & Jin, Pu-Hang & Tao, Wen-Quan, 2024. "Correlations of falling film hydrodynamics and heat transfer on horizontal tubes: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 197(C).
    6. Arunkumar, T. & Lim, Hyeong Woo & Lee, Sang Joon, 2022. "A review on efficiently integrated passive distillation systems for active solar steam evaporation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 155(C).

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