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Theoretical estimation of the optimum glass cover water film cooling parameters combinations of a stepped solar still

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  • El-Samadony, Y.A.F.
  • Kabeel, A.E.

Abstract

In the present work, theoretical performance evaluation of a stepped solar still using water film cooling over the glass cover is investigated. The effect of film cooling thickness, flow rate, inlet temperature, and air wind speed on the stepped solar still daily productivity is studied. To increase the performance of the stepped solar still outlet water film cooling is recycled as a makeup water. It was found that film cooling thickness, volumetric flow rate, and water film inlet temperature have a significant effect on the daily distillate productivity. The presence of the glass cover water film cooling may increase the stepped still daily productivity by about 8.2% but the value of this percentage mainly depends on the combinations of film cooling parameters. On the other hand, the presence of the film cooling neutralized the effect of air wind speed on the still distillate productivity. Moreover, it was found that the proper combinations of film cooling parameters have a great influence on stepped still productivity and the best combination was: film thickness from 2.5 × 10−4 to 5.5 × 10−4 m, cooling water volumetric flow rate from 4 × 10−5 to 8.5 × 10−5 m3/s, and glass cover length from 2 to 2.8 m. Finally a good agreement between the present theoretical work and previous experimental result has been obtained.

Suggested Citation

  • El-Samadony, Y.A.F. & Kabeel, A.E., 2014. "Theoretical estimation of the optimum glass cover water film cooling parameters combinations of a stepped solar still," Energy, Elsevier, vol. 68(C), pages 744-750.
    • Handle: RePEc:eee:energy:v:68:y:2014:i:c:p:744-750
    DOI: 10.1016/j.energy.2014.01.080
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    1. Velmurugan, V. & Naveen Kumar, K.J. & Noorul Haq, T. & Srithar, K., 2009. "Performance analysis in stepped solar still for effluent desalination," Energy, Elsevier, vol. 34(9), pages 1179-1186.
    2. Velmurugan, V. & Srithar, K., 2011. "Performance analysis of solar stills based on various factors affecting the productivity--A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(2), pages 1294-1304, February.
    3. Kalidasa Murugavel, K. & Sivakumar, S. & Riaz Ahamed, J. & Chockalingam, Kn.K.S.K. & Srithar, K., 2010. "Single basin double slope solar still with minimum basin depth and energy storing materials," Applied Energy, Elsevier, vol. 87(2), pages 514-523, February.
    4. Abu-Hijleh, Bassam A/K & Mousa, Hasan A., 1997. "Water film cooling over the glass cover of a solar still including evaporation effects," Energy, Elsevier, vol. 22(1), pages 43-48.
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    Cited by:

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    2. Arunkumar, T. & Raj, Kaiwalya & Dsilva Winfred Rufuss, D. & Denkenberger, David & Tingting, Guo & Xuan, Li & Velraj, R., 2019. "A review of efficient high productivity solar stills," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 197-220.
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    4. Kabeel, A.E. & Omara, Z.M. & Younes, M.M., 2015. "Techniques used to improve the performance of the stepped solar still—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 46(C), pages 178-188.
    5. Huang, Cheng-Hung & Chang, Ting-Rui, 2017. "Determination of optimal inclination function for external reflector of basin type still for maximum distillate productivity," Energy, Elsevier, vol. 141(C), pages 1728-1736.
    6. Sharshir, S.W. & Elsheikh, A.H. & Peng, Guilong & Yang, Nuo & El-Samadony, M.O.A. & Kabeel, A.E., 2017. "Thermal performance and exergy analysis of solar stills – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 73(C), pages 521-544.
    7. Kaviti, Ajay Kumar & Yadav, Akhilesh & Shukla, Amit, 2016. "Inclined solar still designs: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 429-451.
    8. 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.
    9. Sharshir, S.W. & Peng, Guilong & Wu, Lirong & Essa, F.A. & Kabeel, A.E. & Yang, Nuo, 2017. "The effects of flake graphite nanoparticles, phase change material, and film cooling on the solar still performance," Applied Energy, Elsevier, vol. 191(C), pages 358-366.
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