Study on heat transfer and friction factor characteristics of γ-Al2O3/water through circular tube with twisted tape inserts with different thicknesses

被引：89

作者：

Esmaeilzadeh, E. ^{[1
]}

Almohammadi, H. ^{[1
]}

Nokhosteen, A. ^{[1
]}

Motezaker, A. ^{[1
]}

Omrani, A. N. ^{[1
]}

机构：

[1] Univ Tabriz, Heat & Fluid Flow Res Lab, Tabriz 5166614766, Iran

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2014年 / 82卷

关键词：

Convective heat transfer; gamma-Al2O3/water nanofluids; Laminar flow; Twisted tape inserts; Performance evaluation factor; LAMINAR-FLOW; THERMAL-CONDUCTIVITY; PRESSURE-DROP; NANOFLUIDS; AUGMENTATION; ENHANCEMENT;

D O I：

10.1016/j.ijthermalsci.2014.03.005

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An experimental study was carried out to investigate heat transfer and friction factor characteristics of gamma-Al2O3/water nanofluid through circular tube with twisted tape inserts with various thicknesses at constant heat flux. In this work, gamma-Al2O3/water nanofluids with two volume concentrations of 0.5% and 1% were used as the working fluid. The twist ratio of twisted tape remained constant at 3.21, while the thicknesses were changed through three values of 0.5 mm, 1 mm and 2 mm. The experiments were performed in laminar flow regime from 150 to 1600 Reynolds numbers. Results indicated that twisted tape inserts enhanced the average convective heat transfer coefficient, and also more the thickness of twisted tape is more the enhancement of convective heat transfer coefficient is. Also, the highest enhancement was achieved at maximum volume concentration. Results showed that nanofluids have better heat transfer performance when utilized with thicker twisted tapes. At the same time, the increase in twisted tape thickness leads to an increase in friction factor. In the end, the combined results of these two phenomena result in enhanced convective heat transfer coefficient and thermal performance. Finally, two new correlations were offered for Nusselt number and thermal performance based on our experimental observation. (c) 2014 Published by Elsevier Masson SAS.

引用

页码：72 / 83

页数：12

共 38 条

[1] Heat transfer augmentation for the flow of a viscous liquid in circular tubes using twisted tape inserts [J].

Agarwal, SK ;

Rao, MR .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1996, 39 (17) :3547-3557

[2]

Akhavan-Behabadi M.A., INT J REFRIG, V32

[3]

[Anonymous], 1956, INVESTIGATION THEORY

[4]

[Anonymous], 1978, ADV HEAT TRANSFER

[5] Effect of particle size on the convective heat transfer in nanofluid in the developing region [J].

Anoop, K. B. ;

Sundararajan, T. ;

Das, Sarit K. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2009, 52 (9-10) :2189-2195

[6] Experimental Study on Forced Convective Heat Transfer with Low Volume Fraction of CuO/Water Nanofluid [J].

Asirvatham, Lazarus Godson ;

Vishal, Nandigana ;

Gangatharan, Senthil Kumar ;

Lal, Dhasan Mohan .

ENERGIES, 2009, 2 (01) :97-119

[7]

Beckwith T., 1990, Mechanical Measurements, V4th

[8] Heat transfer and pressure drop in a spirally grooved tube with twisted tape insert [J].

Bharadwaj, P. ;

Khondge, A. D. ;

Date, A. W. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2009, 52 (7-8) :1938-1944

[9] Experimental studies on heat transfer and friction factor characteristics of Al2O3/water nanofluid in a circular pipe under laminar flow with wire coil inserts [J].

Chandrasekar, M. ;

Suresh, S. ;

Bose, A. Chandra .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2010, 34 (02) :122-130

[10] Turbulent heat transfer and pressure drop in tube fitted with serrated twisted tape [J].

Chang, Shyy Woei ;

Jan, Yih Jena ;

Liou, Jin Shuen .

INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2007, 46 (05) :506-518

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