Study of thermal performance of double pipe heat exchanger using W-cut twisted tape

ABSTRACT

An experimental analysis was carried out to estimate Nusselt number and friction factor behavior in a double pipe heat exchanger for W-cut twisted tape, in which Reynolds numbers ranging from 5500 to 16,000 are used, and the depth of W-cut to width of twisted tape ratio are 0.2, 0.4, and 0.6 in twisted tape of 10 mm width and 1 mm thickness. Effects of twist ratio are also analyzed by varying twist ratio 5, 10 and 15. It has been found that using twisted tape inserts causes turbulence and flow separation, resulting in better fluid mixing. Due to augmentation in turbulence, an enhancement in heat transfer and TPF was observed. Validation of test section done with predefined correlation and experimental results. It has been found that peak enhancement in Nusselt number and friction factor observed at Reynolds number 5500 for depth of W-cut 6 mm and twist ratio of 5 is\\are 105.47% and 301% respectively. Maximum TPF and friction factor were seen under the same circumstances. For the current analysis, the maximum TPF observed is 1.35.

KEYWORDS:

• Turbulence
• flow separation
• twist ratio
• thermal performance factor
• W-cut

Disclosure statement

None to declare.

Additional information

Notes on contributors

Bhrant Kumar Dandoutiya

Bhrant Kumar Dandoutiya received M tech degree From Maulana Azad National Institute of Technology, Bhopal, India in Mechanical engineering. He is currently pursuing PhD in Maulana Azad National Institute of Technology, Bhopal in mechanical engineering on nanofluid effect on heat transfer.

Arvind Kumar

Dr. Arvind Kumar has 11 year of experience of providing knowledge resource to students and expertise in participatory and innovative teaching learning methodologies. He has done Ph.D. from Maulana Azad National Institute of Technology, Bhopal and presently working as an Assistant Professor at Maulana Azad National Institute of Technology, Bhopal. His area of research is heat transfer. He has published more than 20 research paper in various reputed and peer reviewed international/national journals and conferences. He has attended and acted as resource person in various Faculty Development Program and Short Term Training Program. Author is an member of professional societies like ISHMT and ASME.