Numerical Analysis of Heat transfer Enhancement in a double pipe heat exchanger with a holed twisted tape

Akarsh Kumar, Ujjawal Sureka, Shiva Kumar

Research output: Contribution to journalConference article

Abstract

In the present study numerical analysis of enhancement in heat transfer characteristics in a double pipe heat exchanger is studied using a holed twisted tape.The twisted tape with a constant twist ratio is inserted in a double pipe heat exchanger. Holes of diameter 1mm, 3 mm and 5 mm were drilled at regular pitch throughout the length of the tape. Numerical modeling of a double pipe heat exchanger with the holed twisted tape was constructed considering hot fluid flowing in the inner pipe and cold fluid through the annulus.Simulation was done for varied mass flow rates of hot fluid in the turbulent condition keeping the mass flow rate of cold fluid being constant. Thermal properties like Outlet temperatures, Nusselt number, overall heat transfer coefficient, heat transfer rate and pressure drop were determined for all the cases. Results indicated that normaltwisted tape without holes performed better than the bare tube. In the tested range of mass flow rates the average Nusselt number and heat transfer rate were increased by 85% and 34% respectively. Performance of Twisted tape with holes was slightly reduced than the normal twisted tape and it deteriorated further for higher values hole diameter. Pressure drop was found to be higher for the holed twisted tape than the normal tape.

Original languageEnglish
Article number04012
JournalMATEC Web of Conferences
Volume144
DOIs
Publication statusPublished - 09-01-2018

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Tapes
Heat exchangers
Numerical analysis
Pipe
Heat transfer
Fluids
Flow rate
Nusselt number
Pressure drop
Heat transfer coefficients
Thermodynamic properties

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Engineering(all)

Cite this

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abstract = "In the present study numerical analysis of enhancement in heat transfer characteristics in a double pipe heat exchanger is studied using a holed twisted tape.The twisted tape with a constant twist ratio is inserted in a double pipe heat exchanger. Holes of diameter 1mm, 3 mm and 5 mm were drilled at regular pitch throughout the length of the tape. Numerical modeling of a double pipe heat exchanger with the holed twisted tape was constructed considering hot fluid flowing in the inner pipe and cold fluid through the annulus.Simulation was done for varied mass flow rates of hot fluid in the turbulent condition keeping the mass flow rate of cold fluid being constant. Thermal properties like Outlet temperatures, Nusselt number, overall heat transfer coefficient, heat transfer rate and pressure drop were determined for all the cases. Results indicated that normaltwisted tape without holes performed better than the bare tube. In the tested range of mass flow rates the average Nusselt number and heat transfer rate were increased by 85{\%} and 34{\%} respectively. Performance of Twisted tape with holes was slightly reduced than the normal twisted tape and it deteriorated further for higher values hole diameter. Pressure drop was found to be higher for the holed twisted tape than the normal tape.",
author = "Akarsh Kumar and Ujjawal Sureka and Shiva Kumar",
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Numerical Analysis of Heat transfer Enhancement in a double pipe heat exchanger with a holed twisted tape. / Kumar, Akarsh; Sureka, Ujjawal; Kumar, Shiva.

In: MATEC Web of Conferences, Vol. 144, 04012, 09.01.2018.

Research output: Contribution to journalConference article

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