Thermal performance of tubular heat exchanger with multiple twisted-tape inserts

Simple item page
dc.contributor.authorChokphoemphun, Suriya
dc.contributor.authorPimsarn, Monsak
dc.contributor.authorThianpong, Chinaruk
dc.contributor.authorPromvonge, Pongjet
dc.date.accessioned2026-08-06T10:11:34Z
dc.date.available2026-08-06T10:11:34Z
dc.date.issued2015-05-01
dc.description.abstractThe paper presents an experimental investigation on enhanced heat transfer and pressure loss characteristics by using single, double, triple, and quadruple twisted-tape inserts in a round tube having a uniform heat-fluxed wall. The investigation has been conducted in the heat exchanger tube inserted with various twisted-tape numbers for co- and counter-twist arrangements for the turbulent air flow, Reynolds number (Re) from 5300 to 24000. The typical single twisted-tape inserts at two twist ratios, y/w = 4 and 5, are used as the base case, while the other multiple twisted-tape inserts are at y/w = 4 only. The experimental results of heat transfer and pressure drop in terms of Nusselt number (Nu) and friction factor (f), respectively, reveal that Nu increases with the increment of Re and of twisted-tape number. The values of Nu for the inserted tube are in a range of 1.15-2.12 times that for the plain tube while f is 1.9-4.1 times. The thermal enhancement factor of the inserted tube under similar pumping power is evaluated and found to be above unity except for the single and the double co-twisted tapes. The quadruple counter-twisted tape insert provides the maximum thermal performance.
dc.identifier.citationChinese Journal of Chemical Engineering, 23(5), 755-762, 2015
dc.identifier.doi10.1016/j.cjche.2015.01.003
dc.identifier.issn10049541
dc.identifier.other2-s2.0-84931084060
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/6249
dc.sourceChinese Journal of Chemical Engineering
dc.subjectFriction factor
dc.subjectNusselt number
dc.subjectThermal performance
dc.subjectTurbulator
dc.subjectTwisted tape arrangement
dc.titleThermal performance of tubular heat exchanger with multiple twisted-tape inserts
dc.typeArticle

Files

Collections

Research