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Research Papers

Experimental and Numerical Investigation of the Gas Side Heat Transfer and Pressure Drop of Finned Tubes—Part I: Experimental Analysis

[+] Author and Article Information
Rene Hofmann

Josef Bertsch GmbH & Co. KG,
Herrengasse 23,
A-6700 Bludenz, Austria
e-mail: rene.hofmann@bertsch.at

Heimo Walter

Mem. ASME
Institute for Energy Systems and Thermodynamics,
Vienna University of Technology,
Getreidemarkt 9, A-1060 Vienna, Austria
e-mail: heimo.walter@tuwien.ac.at

In Ref. [8], two different correlations are presented. The difference in the correlations is given in the coefficients C1, C3, and C5.

Manuscript received February 27, 2012; final manuscript received June 16, 2012; published online October 17, 2012. Assoc. Editor: Larry Swanson.

J. Thermal Sci. Eng. Appl 4(4), 041007 (Oct 17, 2012) (11 pages) doi:10.1115/1.4007124 History: Received February 27, 2012; Revised June 16, 2012

In this study, a heat transfer and pressure drop correlation are determined for helically I- and U-shaped finned tubes as well as for solid I-finned tubes at constant transverse and longitudinal spacing. In the heat transfer correlation, the influence of the number of tube rows arranged in flow direction is taken into consideration. A detailed description of the test rig and the data reduction procedure is presented. A thorough uncertainty analysis was performed to validate the results. The investigation has shown that the influence of the fin geometry on the heat transfer of the helically segmented I- and U-shaped tubes can be disregarded. The heat transfer correlation, which is valid for the helically segmented I- and U-shaped tubes in a staggered arrangement, can describe 90% of all measurement data within ±15%. All measurements are performed for constant transverse and longitudinal spacing. For the pressure drop coefficient, two new correlations, which are only valid for helically segmented U shaped finned tubes in a staggered arrangement, show an average deviation of approximately ±13% for 90% of all measurement results. All new correlations are compared with correlations from open and established literature for industrial boiler applications. The new heat transfer and pressure drop correlations show a relative deviation of ±20% in comparison with correlations in open literature. The new pressure drop correlations show the same characteristic as most correlations in the open literature.

Copyright © 2012 by ASME
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References

Frasz, F., 2008, Principles of Finned-Tube Heat Exchanger Design for Enhanced Heat Transfer, Heat and Mass Transfer, WSEAS-Press.
Schmidt, T. E., 1963, “Der Waermeuebergang an Rippenrohre und die Berechnung von Rohrbuendel-Waermeaustauschern,” Kaeltetechnik, 15(4), pp. 98–102.
Briggs, D. E., and Young, E. H., 1963, “Convection Heat Transfer and Pressure Drop of Air Flowing Across Triangular Pitch Banks of Finned Tubes,” Chem. Eng. Prog., Symp. Ser., 59(41), pp. 1–10.
Naess, E., 2010, “Experimental Investigation of Heat Transfer and Pressure Drop in Serrated-Fin Tube Bundles With Staggered Tube Layouts,” Appl. Therm. Eng., 30, pp. 1531–1537. [CrossRef]
Huisseune, H., T'Joen, C., Brodeoux, P., Debaets, S., and De Paepe, M., 2010, “Thermal Hydraulic Study of a Single Row Heat Exchanger With Helically Finned Tubes,” ASME J. Heat Transfer, 132, p. 061801. [CrossRef]
Martinez, E., Vicente, W., Soto, G., and Salinas, M., 2011, “Comparative Analysis of Heat Transfer and Pressure Drop in Helically Segmented Finned Tube Heat Exchangers,” Appl. Therm. Eng., 30, pp. 1470–1476. [CrossRef]
Weierman, C., 1976, “Correlations Ease the Selection of Finned Tubes,” Oil Gas J., 74(36), pp. 94–10.
Ganapathy, V., 2003, Industrial Boilers and Heat Recovery Steam Generators, Marcel Dekker, Inc., New York.
Nir, A., 1991, “Heat Transfer and Friction Factor Correlations for Crossflow Over Staggered Finned Tube Banks,” Heat Transfer Eng., 12(1), pp. 43–58. [CrossRef]
Kawaguchi, K., 2005, “Heat Transfer and Pressure Drop Characteristics of Finned Tube Banks in Forced Convection,” J. Enhanced Heat Transfer, 12(1), pp. 1–20. [CrossRef]
Tavoularis, S., 2005, Measurement in Fluid Mechanics, Cambridge University Press, New York.
Stasiulevičius, J., and Skrinska, A., 1988, Heat Transfer of Finned Tube Bundles in Crossflow, Hemisphere Publ. Corp., Washington, D.C.
Mon, M. S., 2003, “Numerical Investigation of Air-Side Heat Transfer and Pressure Drop in Circular Finned-Tube Heat Exchangers,” Ph.D. dissertation, TU-Bergakademie, Freiberg.
Frasz, F., and Linzer, W., 1992, “Heat Transfer Problems at Finned Tube Bundles in Cross Flow,” Brennst.- Waerme-Kraft, 44(7-8), pp. 333–336 (in German).
Hofmann, R., Frasz, F., and Ponweiser, K., 2008, “Experimental Heat Transfer Investigation of Tube Row Effects at Air Side Heat Exchanger With Serrated Finned-Tubes,” Proceedings of the 6th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment, WSEAS, pp. 193–201.
Gnielinski, V., 1995, “Ein neues Berechnungsverfahren fuer die Waermeuebertragung im Uebergangsbereich zwischen laminarer und turbulenter Rohrstroemung,” Forsch. Ingenieurwes., 61(9), pp. 240–248. [CrossRef]
FDBR-Handbuch, 1980, Waerme - und Stroemungstechnik, Waermeuebertragung in Dampferzeugern und Waermeaustauschern, FDBR Fachbuchreihe, ed., Fachverband Dampfkessel-, Behaelter- und Rohrleitungsbau, Essen.
Haar, L., Gallagher, J. S., and Kell, G. S., 1988, NBS/NRC Wasserdampftafeln, Springer-Verlag, Berlin.
Richter, F., 1983, “Physikalische Eigenschaften von Staehlen und ihre Temperaturabhaengigkeit,” MANNESMANN Forschungsberichte 10, Verlag Stahleisen m. b. H., Duesseldorf.
DIN 1319, 1996, Basics of the Measurement Technique, DIN, Berlin, Part 1–4 (in German).
Bantel, M., 2000, Basics of the Measurement Technique, 1st ed., Fachbuchverlag, Leipzig (in German).
Hofmann, R., 2009, “Experimental and Numerical Gas-Side Performance Evaluation of Finned-Tube Heat Exchangers,” Ph.D. thesis, Vienna University of Technology, Austria.
Steimle, F., and Stephan, K., eds., 1988, “Waermeuebertragung in Luftkuehlern,” Waermetauscher (Part B of Handbuch der Kaeltetechnik), Vol. 6, Springer-Verlag, Berlin, pp. 435–488.
VDI, 2006, VDI-Wārmeatlas, 10th ed., Springer-Verlag, Berlin.
Frasz, F., 1994, “Waermeuebertragung in Rippenrohrwaermeaustauschern, Waermeaustauscher, Energieeinsparung durch Optimierung von Waermeprozessen,” Vulkan-Verlag Essen, 2, pp. 70–76.
Konakov, P. K., 1954, “Eine neue Formel fr den Reibungskoeffizienten glatter Rohre,” Bericht der Akademie der Wissenschaften der UDSSR, 51(7), pp. 503–506.
Hofmann, R., Frasz, F., and Ponweiser, K., 2008, “Experimental Analysis of Enhanced Heat Transfer and Pressure-Drop of Serrated Finned-Tube Bundles With Different Fin Geometries,” Proceedings of the 5th WSEAS International Conference on Heat and Mass Transfer (HMT08), WSEAS, pp. 54–62.
Weierman, C., Taborek, J., and Marner, W. J., 1978, “Comparison of the Performance of In-Line and Staggered Banks of Tubes With Segmented Fins,” Am. Inst. Chem. Eng., 74(174), pp. 39–46.
Tenner, J., Klaus, P., and Schulze, E., 1998, “Erfahrungen bei der Erstellung und dem Einsatz eines Datenvalidierungsmodells zur Prozessueberwachung und -optimierung im Kernkraftwerk Isar 2,” VGB Kraftwerkstechnik, 4, pp. 43–49.
Schryber, E. A., 1945, “Heat Transfer Coefficients and Other Data of Individual Serrated-Fin Surfaces,” Trans. ASME, 67(8), pp. 683–686.
Rabas, T. J., and Eckels, P. W., 1975, “Heat Transfer and Pressure Drop Performance of Segmented Extended Surface Tube Bundle,” ASME Paper No. 75-HT-45.
Epple, B., Leithner, R., Linzer, W., and Walter, H., 2009, Simulation von Kraftwerken und waermetechnischen Anlagen, 1st ed., Springer-Verlag, Vienna.
Breber, G., 1991, “Heat Transfer and Pressure Drop of Stud Finned Tubes,” Am. Inst. Chem. Eng., 87(283), pp. 383–390.
Krupiczka, R., Rotkege, A., Walczyk, H., and Dobner, L., 2003, “An Experimental Study of Convective Heat Transfer From Extruded Type Helical Finned Tubes,” Chem. Eng. Process., 42(1), pp. 29–38. [CrossRef]
HEDH, 1987, Heat Exchanger Design Handbook, Hemisphere Publ. Corp., Washington, D.C.
Mieth, H. C., 1970, “Method for Heat Transfer Calculations of Helical-Wound Fin Tubes,” Petroleum Mechanical Enginering and Pressure Vessels and Piping Conference, pp. 2–8, ASME Paper No. 70-Pet-4.
Brockmann, M., 2000, Druckverlust bei Stroemungen quer zu Rippenrohren , Series 6, Nr. 431, Progress-Report VDI, Energietechnik.

Figures

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Fig. 1

Sketch of the test facility; the dimensions of the test rig are in millimeters

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Fig. 2

Dimension of the test section and tube arrangement

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Fig. 3

Sketch of the measurement setup

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Fig. 4

Position for thermocouples and pressure transducer positioning at test rig

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Fig. 5

Measurement range of the water mass flow

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Fig. 6

Airflow measurement uncertainties

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Fig. 7

Sketch of the analyzed U-shaped segmented finned tube

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Fig. 8

Contact area between fin and bare tube for I-, L- and U-shaped finned tubes

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Fig. 9

Row correction factor for different Re numbers for U-shaped segmented finned tubes

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Fig. 10

Comparison between the row correction factor Eq. (22) and correlations in the open literature

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Fig. 11

Comparison between the heat transfer and the correlation of ESCOATM [8]; for eight tube rows (Pr = 0.71 and da = 38 mm)

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Fig. 12

Comparison between the heat transfer correlation (26) and our experimental data for segmented I- and U-shaped finned tubes

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Fig. 13

Comparison between heat transfer correlation (26) and correlations in the open literature; based on geometrical data of helically U-shaped finned tube

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Fig. 14

Pressure drop coefficient for different finned tube geometries, evaluated for 1 tube row

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Fig. 15

Regression of pressure drop coefficient at eight segmented finned tube rows

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Fig. 16

Comparison between the new correlation for the pressure drop, Eq. (28) and the experimental data

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Fig. 17

Comparison between the pressure drop correlation (28) and the correlations in the open literature

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