Heat Transfer Enhancement in a Tube Using Elliptical-Cut Twisted Tape Inserts

International Journal of Mechanical Engineering

© 2015 by SSRG - IJME Journal

Volume 2 Issue 5

Year of Publication : 2015

Authors : Pratik P. Ganorkar, R.M. Warkhedkar

10.14445/23488360/IJME-V2I5P104

How to Cite?

Pratik P. Ganorkar, R.M. Warkhedkar, "Heat Transfer Enhancement in a Tube Using Elliptical-Cut Twisted Tape Inserts," SSRG International Journal of Mechanical Engineering, vol. 2,  no. 5, pp. 12-18, 2015. Crossref, https://doi.org/10.14445/23488360/IJME-V2I5P104

Abstract:

An experimental investigation was carried to improve the performance of heat exchanging devices for reducing material cost and surface area  for heat transfer. The effect of Elliptical-cut twisted tape insert on heat transfer, friction factor and thermal performance factor characteristic in a circular tube were investigated for twist ratio (y= 8.0) and five different combinations of major and minor axis ratios (Z=5, Z=4, Z=3.3, Z=3, Z=2.5). The Reynolds numbers were varied in the range 5000-22000. Nusselt numbers obtained from smooth tube were compared with Gnielinski and Dittus-Boelter correlation and errors were found to be average of 12.2% and 9.2% respectively. Friction factor obtained from experiments were compared with Blasius and Petukhov correlation found to be increased by an average of 43.6% and 43% respectively. The obtained results shows that the mean Nusselt number and the mean friction factor in the tube with elliptical-cut twisted tape increase with decreasing major to minor axis ratio (Z)

Keywords:

Elliptical-cut twisted tape insert, Friction factor, Heat exchanger, Heat transfer enhancement.

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