Intertwined Helical Tube Insertion Impact on Thermal-Hydrodynamic Characteristics Associated with Internal Flows

Ikpotokin, I. and Uguru-okorie, D.C. and Dara, A.A. (2017) Intertwined Helical Tube Insertion Impact on Thermal-Hydrodynamic Characteristics Associated with Internal Flows. International Journal of Trend in Research and Development, 4 (1). pp. 256-260. ISSN 2394-9333

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Abstract

Heat transfer improvement has attracted a great deal of interest owing to the concern for energy saving and high thermal system performance requirement. For example, heat exchangers that operate in parallel flow are limited in engineering applications because of their inability to recover much heat. Tube inserts such as wire coil and twisted tapes are used to enhance heat transfer. Unfortunately, the attendant increase in pressure drop associated with wire coil and twisted tube inserts has become an increasing concern in industries. Therefore, an experimental investigation was carried out to determine the effect of intertwined helical tube insert on convective heat transfer coefficient and pressure drop for concurrent and countercurrent flow in tube heat exchanger. Pressure drop associated with the use of the tube insert was 10% and 12% greater than that of using plain tube for concurrent and countercurrent flows respectively. Such low resulting pressure drop could be due to the tube insert pitch ratio and well ordered flow within the tube. Thermal improvement results were 3.2 and 3.8 for concurrent and countercurrent flows respectively. This implies that the use of intertwined helical tube insert justify the additional pumping power required. In addition, much energy was recovered in concurrent flow using helical tube inserts.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: IGBINOSA IKPOTOKIN
Date Deposited: 13 Jul 2017 13:13
Last Modified: 13 Jul 2017 13:13
URI: http://eprints.lmu.edu.ng/id/eprint/820

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