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Energy and exergy analysis of passive solar distillation systems

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  • K.R. Ranjan
  • S.C. Kaushik
  • N.L. Panwar

Abstract

In this communication, a comprehensive thermodynamic model for exergy analysis of a passive solar distillation system is presented. Temperatures of basin-liner, saline water body and inner and outer glass cover are estimated theoretically with the help of a computer program using a set of typical design and operating parameters. Energy and exergy analysis of a single-effect, single-slope horizontal passive solar still has been carried out under climatic conditions of India. It has been shown that the passive solar still can produce 4.17 l/m2 of freshwater daily. Energy and exergy efficiency of the solar still are 30.42 and 4.93%, respectively. Causes, quantity and place of exergy destruction have also been explored for further research and improvement in the design and performance of solar stills. Exergy destruction or irreversibility in the process of each component, i.e. basin-liner, saline water body and glass cover, has been evaluated as 3353, 1633 and 362 W/m2, respectively, corresponding to the total solar exergy input of 6958 W/m2 on a typical day. Their corresponding exergy efficiencies are found to be 3.91, 17.67 and 42.36%. The global exergy efficiency of the solar still is also estimated as 23.14%, taking these exergy destructions into account. The basin-liner is identified as the component around which there is highest possibility of improvement.

Suggested Citation

  • K.R. Ranjan & S.C. Kaushik & N.L. Panwar, 2016. "Energy and exergy analysis of passive solar distillation systems," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 11(2), pages 211-221.
    • Handle: RePEc:oup:ijlctc:v:11:y:2016:i:2:p:211-221.
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctt069
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    Cited by:

    1. Jeyaraj, Thavamani & Kumar, Pankaj, 2023. "Theoretical and experimental investigation of double slope solar still with channel integration: Energy, exergy and water quality analysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    2. Hassan, Hamdy & Yousef, Mohamed S. & Fathy, Mohamed & Ahmed, M. Salem, 2020. "Assessment of parabolic trough solar collector assisted solar still at various saline water mediums via energy, exergy, exergoeconomic, and enviroeconomic approaches," Renewable Energy, Elsevier, vol. 155(C), pages 604-616.
    3. Khanmohammadi, Saber & Khanmohammadi, Shoaib, 2019. "Energy, exergy and exergo-environment analyses, and tri-objective optimization of a solar still desalination with different insulations," Energy, Elsevier, vol. 187(C).
    4. Patrick Moriarty & Damon Honnery, 2019. "Energy Accounting for a Renewable Energy Future," Energies, MDPI, vol. 12(22), pages 1-16, November.

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