Comparative study on thermal performance of helical screw tape inserts in laminar flow using Al2O3/water and CuO/water nanofluids

Suresh, S.; Venkitaraj, K.P.; Selvakumar, P.

doi:10.1016/j.spmi.2011.03.012

Cited by 77 publications

(24 citation statements)

References 15 publications

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“…al. [7] have compared the thermal performance of helical screw tape inserts in laminar flow of Al 2 O 3 /water and CuO/water nanofluids through a straight circular duct with constant heat flux boundary condition. They reported that thermal performance factor of helical screw tape inserts using CuO/water nanofluid is found to be higher when compared with the corresponding value using Al 2 O 3 /water.…”

Section: ____________________________________________________________mentioning

confidence: 99%

Effect of Nanofluid on Friction Factor of Pipe and Pipe Fittings: Part Ii Effect of Copper Oxide Nanofluid

Chavda¹

2015

IJRET

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Section: ____________________________________________________________mentioning

confidence: 99%

Effect of Nanofluid on Friction Factor of Pipe and Pipe Fittings: Part Ii Effect of Copper Oxide Nanofluid

Chavda¹

2015

IJRET

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“…Their results revealed that maximum thermal performance factor of 5.53 was obtained at Reynolds number of 1990 with the simultaneous use of 0.7% CuO/water nanofluid with alternate axis twisted tape. Suresh et al [24] have performed a comparative study on the thermal performance of helical screw tape inserts with 0.1% volume concentration Al 2 O 3 /water and CuO/water nanofluids in laminar flow through a straight circular duct under constant heat flux boundary condition. The helical screw tape inserts with twist ratios = 1.78, 2.44, and 3 were used for investigation.…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies on Thermal Performance of Conic Cut Twist Tape Inserts with SiO₂ and TiO₂ Nanofluids

Salman

Kadhum

Takriff

et al. 2015

Journal of Nanomaterials

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This paper presents a comparison study on thermal performance conic cut twist tape inserts in laminar flow of nanofluids through a constant heat fluxed tube. Three tape configurations, namely, quadrant cut twisted tape (QCT), parabolic half cut twisted tape (PCT), and triangular cut twisted (VCT) of twist ratio = 2.93 and cut depth = 0.5 cm were used with 1% and 2% volume concentration of SiO 2 /water and TiO 2 /water nanofluids. Typical twist tape with twist ratio of = 2.93 was used for comparison. The results show that the heat transfer was enhanced by increasing of Reynolds number and nanoparticles concentration of nanofluid. The results have also revealed that the use of twist tape enhanced the heat transfer coefficient significantly and maximum heat transfer enhancement was achieved by the presence of triangular cut twist tape insert with 2% volume concentration of SiO 2 nanofluid. Over the range investigated, the maximum thermal performance factor of 5.13 is found with the simultaneous use of the SiO 2 nanofluid at 2% volume concentration VCT at Reynolds number of 220. Furthermore, new empirical correlations for Nusselt number, friction factor, and thermal performance factor are developed and reported.

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“…S. Saha and S. K. coupled helical tape with a circular duct having integral helical rib. Suresh et al (2011) applied helical screw tapes as tube inserts and Al 2 O 3 =water and CuO=water nanofluids as working fluids for heat transfer enhancement. Their results showed that the helical screw tape inserts gave better thermal performance when used with CuO=water nanofluid than with Al 2 O 3 =water nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Thermohydraulic Performance of Heat Exchanger Tube Equipped with Single-, Double-, and Triple-Helical Twisted Tapes

Eiamsa-ard

Nanan

Wongcharee

et al. 2014

Chemical Engineering Communications

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Heat transfer augmentation by dual-helical twisted tapes (D-HTTs) and triple-helical twisted tapes (T-HTTs) is presented in comparison with that by single-helical twisted tape (S-HTT). The effects of tape width ratio (w=D ¼ 0.1, 0.15, and 0.2) on heat transfer, friction factor, and thermal performance are also reported. The experiments were performed using air as a working fluid for Reynolds number between 6000 and 20,000. At similar conditions, the use of D-HTTs and T-HTTs leads to the increase of Nusselt number by respectively 15.6% to 17.6% and 19.5% to 23.4%, the increase of friction factor by respectively 83% to 206% and 143% to 335%, and the decrease of thermal performance factor by 3.9% to 20.3% and 8.3% to 26.2% compared to those obtained from the use of S-HTT=promoter. As the width ratio increases, both Nusselt number and friction factor are considerably increased. However, due to the poorer trade-off between the increases of Nusselt number and friction factor, lower thermal performance factor is consistently obtained at the conditions possessing higher Nusselt number. At similar conditions, S-HTTs consistently give a higher thermal performance factor than D-HTTs and T-HTTs; the maximum thermal performance factors given by S-HTTs with w=D of 0.1, 0.15, and 0.2 are 1.34, 1.31, and 1.29, respectively (at Reynolds number of 6000).

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Comparative study on thermal performance of helical screw tape inserts in laminar flow using Al2O3/water and CuO/water nanofluids

Cited by 77 publications

References 15 publications

Effect of Nanofluid on Friction Factor of Pipe and Pipe Fittings: Part Ii Effect of Copper Oxide Nanofluid

Effect of Nanofluid on Friction Factor of Pipe and Pipe Fittings: Part Ii Effect of Copper Oxide Nanofluid

Comparative Studies on Thermal Performance of Conic Cut Twist Tape Inserts with SiO₂ and TiO₂ Nanofluids

Thermohydraulic Performance of Heat Exchanger Tube Equipped with Single-, Double-, and Triple-Helical Twisted Tapes

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Comparative study on thermal performance of helical screw tape inserts in laminar flow using Al2O3/water and CuO/water nanofluids

Cited by 77 publications

References 15 publications

Effect of Nanofluid on Friction Factor of Pipe and Pipe Fittings: Part Ii Effect of Copper Oxide Nanofluid

Effect of Nanofluid on Friction Factor of Pipe and Pipe Fittings: Part Ii Effect of Copper Oxide Nanofluid

Comparative Studies on Thermal Performance of Conic Cut Twist Tape Inserts with SiO2 and TiO2 Nanofluids

Thermohydraulic Performance of Heat Exchanger Tube Equipped with Single-, Double-, and Triple-Helical Twisted Tapes

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Comparative Studies on Thermal Performance of Conic Cut Twist Tape Inserts with SiO₂ and TiO₂ Nanofluids