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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 83, 2023 - Issue 6
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Research Articles

Influence of twisted tape length on the thermal performance of a heat exchanger tube

Jyoti Prakash PandaDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, India
,
Bipin KumarDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, India
,
Manoj KumarDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, IndiaORCID Iconhttps://orcid.org/0000-0003-0969-6107
ORCID Icon &
Anil Kumar PatilDepartment of Mechanical Engineering, DIT University, Dehradun, Uttarakhand, IndiaCorrespondence[email protected] [email protected]
Pages 650-663 | Received 23 Feb 2022, Accepted 11 Jul 2022, Published online: 26 Jul 2022
 
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Abstract

The application of twisted tape inserts in heat exchangers allows higher heat transfer rates with a simultaneous loss of energy due to turbulence and friction. In a conventional approach, the twisted tape is placed in the entire length of the heat exchanger. The present study explores the effect of the length of the twisted tape insert at a different twist ratio (TR) for 4700 < Re < 22,800. The insert length ratio (LR) ranges from 0.25 to 1 and the TR ranges from 1.5 to 6. The maximum Nusselt number corresponds to the LR of 0.75 at a TR of 1.5. The maximum thermo-hydraulic performance is found to be 3.2 for the LR of 0.75 at a TR of 1.5.

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