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

J. Ananth and S. Jaisankar

Energy, 2014, vol. 65, issue C, 357-363

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.

Keywords: Solar water heater; Clockwise and counter clockwise swirl flow; Regularly spaced rod and spacer; Convective heat transfer; Heat removal factor (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:65:y:2014:i:c:p:357-363

DOI: 10.1016/j.energy.2013.12.001

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