Abstract

The aim of the present experimental investigations is to increase of turbulent flow heat transfer in a horizontal circular tube using six types of twisted tapes in which a total length relative to the diameter ratio is 24 and Reynolds number values runs from 4500 to 23500. Take twisted tapes amendment: (normal, regularly spaced, triangular-cut, rectangular-cut, semicircular-cut and drilled) twisted tape. In this study, the development of mutual relations between the Nusselt number, friction factor and enhance the efficiency of each type of inclusion twisted stripe have been taken into account. The results showed that the heat transfer process in tube with twisted ribbon provider drilled more efficient than other forms of twisted tape because the strong spiral flow along the tube length leads to more disturbance of the entire flow field.

Keywords:

Heat transfer , tube, twisted tape,

References

1. Chang, S.W., Y.J. Jan and J.S. Liou, 2007. Turbulent heat transfer and pressure drop in tube fitted with serrated twisted tape. Int. J. Therm. Sci., 46(5): 506-518.
   CrossRef    Direct Link
2. Chang, S.W., T.M. Liou, J.S. Liou and K.T. Chen, 2008. Turbulent heat transfer in a tube fitted with serrated twist tape under rolling and pitching environments with applications to shipping. Ocean Eng., 35(16): 1569-1577.
   CrossRef    Direct Link
3. Eiamsa-ard, S. and P. Promvonge, 2010. Performance assessment in a heat exchanger tube with alternate clockwise and counter-clockwise twisted-tape inserts. Int. J. Heat Mass Tran., 53(7-8): 1364-1372.
   CrossRef    Direct Link
4. Eiamsa-ard, S., C. Thianpong and P. Promvonge, 2006. Experimental investigation of heat transfer and flow friction in a circular tube fitted with regularly spaced twisted tape elements. Int. Commun. Heat Mass, 33(10): 1225-1233.
   
5. Eiamsa-ard, S., C. Thianpong, P. Eiamsa-ard and P. Promvonge, 2009a. Convective heat transfer in a circular tube with short-length twisted tape insert. Int. Commun. Heat Mass, 36(4): 365-371.
   
6. Eiamsa-ard, S., K. Wongcharee and S. Sripattanapipat, 2009b. 3-D Numerical simulation of swirling flow and convective heat transfer in a circular tube induced by means of loose-fit twisted tapes. Int. Commun. Heat Mass, 36(9): 947-955.
   
7. Eiamsa-ard, S., C. Thianpong, P. Eiamsa-ard and P. Promvonge, 2010a. Thermal characteristics in a heat exchanger tube fitted with dual twisted tape elements in tandem. Int. Commun. Heat Mass, 37(1): 39-46.
   
8. Eiamsa-ard, S., C. Thianpong and P. Eiamsa-ard, 2010b. Turbulent heat transfer enhancement by counter/co-swirling flow in a tube fitted with twin twisted tapes. Exp. Therm. Fluid Sci., 34(1): 53-62.
   CrossRef    Direct Link
9. Eiamsa-ard, S., K. Wongcharee, P. Eiamsa-ard and C. Thianpong, 2010c. Heat transfer enhancement in a tube using delta-winglet twisted tape inserts. Appl. Therm. Eng., 30(4): 310-318.
   CrossRef    Direct Link
10. Eiamsa-ard, S., P. Seemawute and K. Wongcharee, 2010d. Influences of peripherally-cut twisted tape insert on heat transfer and thermal performance characteristics in laminar and turbulent tube flows. Exp. Therm. Fluid Sci., 34(6): 711-719.
    CrossRef    Direct Link
11. Guo, J., A. Fan, X. Zhang and W. Liu, 2011. A numerical study on heat transfer and friction factor characteristics of laminar flow in a circular tube fitted with center-cleared twisted tape. Int. J. Therm. Sci., 50(7): 1263-1270.
    CrossRef    Direct Link
12. Hasim, F., M. Yoshida and H. Miyashita, 2003. Compound heat transfer enhancement by a combination of a helically ribbed tube with twisted tape inserts. J. Chem. Eng. Jpn., 36(9): 1116-1122.
    CrossRef    Direct Link
13. Murugesan, P., K. Mayilsamy, S. Suresh and P.S.S. Srinivasan, 2009. Heat transfer and pressure drop characteristics of turbulent flow in a tube fitted with trapezoidal-cut twisted tape insert. Int. J. Acad. Res., 1(1): 123-128.
    Direct Link
14. Murugesan, P., K. Mayilsamy, S. Suresh and P.S.S. Srinivasan, 2011. Heat transfer and pressure drop characteristics in a circular tube fitted with and without V-cut twisted tape insert. Int. Commun. Heat Mass, 38(3): 329-334.
    
15. Promvonge, P., 2008. Thermal augmentation in circular tube with twisted tape and wire coil turbulators. Energ. Convers. Manage., 49(11): 2949-2955.
    
16. Saha, S.K., A. Dutta and S.K. Dhal, 2001. Friction and heat transfer characteristics of laminar swirl flow through a circular tube fitted with regularly spaced twisted-tape elements. Int. J. Heat Mass Tran., 44(22): 4211-4223.
    CrossRef    Direct Link
17. Seemawute, P. and S. Eiamsa-ard, 2010. Thermohydraulics of turbulent flow through a round tube by a peripherally-cut twisted tape with an alternate axis. Int. Commun. Heat Mass, 37(6): 652-659.
    
18. Wang, Y., M. Hou, X. Deng, L. Li, C. Huang, H. Huang, G. Zhang, C. Chen and W. Huang, 2011. Configuration optimization of regularly spaced short-length twisted tape in a circular tube to enhance turbulent heat transfer using CFD modeling. Appl. Therm. Eng., 31(6-7): 1141-1149.
    CrossRef    Direct Link
19. Wongcharee, K. and S. Eiamsa-ard, 2011. Enhancement of heat transfer using CuO/water nanofluid and twisted tape with alternate axis. Int. Commun. Heat Mass, 38(6): 742-748.
    

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