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| A Comparison of Correlations for Heat Transfer from Inclined Pipes
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Source |
International Journal of Engineering (IJE) |
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Table of Contents |
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Volume: 4 Issue: 4 |
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Pages: 262-320 |
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Publication
Date: October 2010 |
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ISSN
(Online): 1985-2312 |
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Pages |
268 - 278 |
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Author(s) |
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Published
Date |
30-10-2010 |
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Publisher |
CSC
Journals, Kuala Lumpur,
Malaysia |
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ADDITIONAL
INFORMATION |
| Keywords Abstract References Cited by Related Articles Collaborative
Colleague |
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KEYWORDS: Conjugate Heat Transfer, Inclined pipes, Heat transfer correlations |
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| A review of literature on heat transfer coefficients indicated very little work reported for cross-flow pipe arrangement at various angles of inclination. In this study forced airflow at 1.1 m/s and 2.5 m/s across 2 steel pipes of diameters 0.034m and 0.049m were examined with pipe orientation inclined at 30 and 60 degrees to the horizontal position. A comparison of the experimentally determined and the conventional method using existing correlations for horizontal pipes in cross-flow showed that at 30 degrees inclination, 1.1 m/s, values were in good agreement. However, there were large differences at 60 degrees inclination, 2.5 m/s. Comparing experimental data with the correlations of Churchill, Zhukaukas, Hilpert, Fand and Morgan showed that for 30 degrees inclination the deviation from experimental at 1.1 m/s ranged from 2% to 18% and 2% to 8% for the 0.034m and 0.049m pipes, respectively, while at 2.5 m/s the deviation ranged from 12 % to 31% and 20% to 41% for the 0.034m and 0.049m diameter pipes, respectively. At 60 degrees inclination the deviation from experimental at 1.1 m/s ranged from 19% to 45% and 27 % to 41% for the 0.034m and 0.049m pipes, respectively, while at 2.5 m/s the deviation ranged from 48% to 65% and 29% to 52% for the 0.034m and 0.049m diameter pipes, respectively. |
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| 1 |
Jisheng Li and J. Tarasuk. “Local Free Convection Around Inclined Cylinders in Air: An Interferometric Study,” Experimental Thermal and Fluid Science, 5:235-242. 1992.
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Hilpert, R. “Heat Transfer from Cylinders,” Forsch. Geb. Ingenieurwes, 4:215. 1933.
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Incropera F. and D. De Witt. Fundamentals of Heat and Mass Transfer, 5th Edition, USA. 2002.
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Fand, R. M. and K. K. Keswani. “A Continuous Correlation Equation for Heat Transfer from Cylinders to Air in Crossflow for Reynold’s Numbers from 10-2 to 2(10)5,” International Journal of Heat and Mass Transfer, 15:559-562. 1972.
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Fand, R.M. and K. K. Keswani. “Recalculation of Hilpert’s Constants,” Transactions of ASME, pp. 224-226. 1973.
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Zukauskas, A. “Heat Transfer From Tubes in Crossflow,” Advances in Heat Transfer, 8:87-159. 1987.
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Churchill, S.W. and H. H. S. Chu. “Correlating Equations for Laminar and Turbulent Free Convection From a Horizontal Cylinder,” International Journal of Heat And Mass Transfer, 18:1049-1053. 1975.
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Churchill, S. W. and M. Bernstein. “A correlating Equation for Forced Convection from Gases and Liquids to a Circular Cylinder in Crossflow,” J. Heat Transfer, 99:300-306. 1977.
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| 9 |
Morgan, V. “Heat Transfer from Cylinders,” Advances in Heat Transfer, 11:199-264. 1987.
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| 10 |
Manohar, K., Yarbrough, D. W. and Booth, J. R. “Measurement of Apparent Thermal Conductivity by the Thermal Probe Method,” Journal of Testing and Evaluation, 28(5):345-351. 2000.
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| 11 |
Coleman, H. W. and Steller, W. G. “Experimentation and Uncertainty Analysis for Engineers,” 2nd Ed., John Wiley and Sons, New York, pp. 47-64 (1999).
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| Krishpersad Manohar : Colleagues
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| Kimberly Ramroop : Colleagues
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