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Investigation on heat transfer and friction factor characteristics of thermosiphon solar water heating system with left-right twist regularly spaced with rod and spacer

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  • Ananth, J.
  • Jaisankar, S.

Abstract

Influences of left-right tube insert regularly spaced with rod and spacer on heat transfer and friction factor characteristics in a thermosiphon solar water heater have been analyzed comprehensively. Results showed that the modified designs of twists reduce the pressure drop significantly between 47.2% and 8.9% lower than the drop offered by full length twist and improve the overall instantaneous thermal efficiency between 53.3% and 38.7% when compared with plain tube collector. Thus an attempt has been made to improve the internal convective heat transfer with lesser pressure drop between the tube wall and fluid in the collector and to test the possibility of using customized designs of left-right twist as tube insert.

Suggested Citation

  • Ananth, J. & Jaisankar, S., 2014. "Investigation on heat transfer and friction factor characteristics of thermosiphon solar water heating system with left-right twist regularly spaced with rod and spacer," Energy, Elsevier, vol. 65(C), pages 357-363.
    • Handle: RePEc:eee:energy:v:65:y:2014:i:c:p:357-363
    DOI: 10.1016/j.energy.2013.12.001
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    References listed on IDEAS

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    1. Jaisankar, S. & Radhakrishnan, T.K. & Sheeba, K.N., 2009. "Studies on heat transfer and friction factor characteristics of thermosyphon solar water heating system with helical twisted tapes," Energy, Elsevier, vol. 34(9), pages 1054-1064.
    2. Kumar, A & Prasad, B.N, 2000. "Investigation of twisted tape inserted solar water heaters—heat transfer, friction factor and thermal performance results," Renewable Energy, Elsevier, vol. 19(3), pages 379-398.
    3. Alvarez, A. & Cabeza, O. & Muñiz, M.C. & Varela, L.M., 2010. "Experimental and numerical investigation of a flat-plate solar collector," Energy, Elsevier, vol. 35(9), pages 3707-3716.
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    Cited by:

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    2. Balaji, K. & Iniyan, S. & Goic, Ranko, 2018. "Thermal performance of solar water heater using velocity enhancer," Renewable Energy, Elsevier, vol. 115(C), pages 887-895.
    3. Balaji, K. & Ganesh Kumar, P. & Sakthivadivel, D. & Vigneswaran, V.S. & Iniyan, S., 2019. "Experimental investigation on flat plate solar collector using frictionally engaged thermal performance enhancer in the absorber tube," Renewable Energy, Elsevier, vol. 142(C), pages 62-72.
    4. Sakhaei, Seyed Ali & Valipour, Mohammad Sadegh, 2019. "Performance enhancement analysis of The flat plate collectors: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 102(C), pages 186-204.
    5. Gautam, Abhishek & Chamoli, Sunil & Kumar, Alok & Singh, Satyendra, 2017. "A review on technical improvements, economic feasibility and world scenario of solar water heating system," Renewable and Sustainable Energy Reviews, Elsevier, vol. 68(P1), pages 541-562.

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