0
Research Papers: Conduction

Heat Conduction Through Heat Exchanger Tubes of Noncircular Cross Section

[+] Author and Article Information
Manoj Ku. Moharana

Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, Indiamanoj.moharana@rediffmail.com

Prasanta Ku. Das

Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, Indiapkd@mech.iitkgp.ernet.in

J. Heat Transfer 130(1), 011301 (Jan 25, 2008) (8 pages) doi:10.1115/1.2780176 History: Received May 25, 2006; Revised May 05, 2007; Published January 25, 2008

Conduction through shaped tubes with circular inner surface and hydrodynamically shaped outer surface has been analyzed by two different techniques. A two-dimensional analysis has been made by a semianalytical technique using boundary collocation at the outer periphery. A one-dimensional approximate technique called sector method shows a closed agreement with the two-dimensional analysis. The present work gives an improvement on the analysis of Li (2004, “Heat Transfer Enhancement Using Shaped Polymer Tubes: Fin Analysis  ,” ASME J. Heat Transfer, 126, pp. 211–218) who solved the same problem using a one-dimensional approximation following the methodology of fin analysis. Both the present methods relax some of the approximations taken by Li Further, the suggested one-dimensional sector method is simple and requires limited computational effort.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Different types of shaped tubes: (a) circular, (b) oval, (c) lenticular, and (d) teardrop

Grahic Jump Location
Figure 2

Differential elements for a one-dimensional energy balance for a single sided fin on an oval shaped tube

Grahic Jump Location
Figure 3

Coordinate system of a typical shaped tube for two-dimensional analysis

Grahic Jump Location
Figure 4

(a) Division of shaped tube into sectors. (b) A single sector (jth in anticlockwise direction) from the domain of the shaped tube.

Grahic Jump Location
Figure 5

Isothermal curves shown in (a) oval, (b) lenticular, and (c) teardrop shaped tubes with isothermal inner wall

Grahic Jump Location
Figure 6

Variation of temperature along (a) radial direction at different angles, (b) angular positions at different radial positions for an oval shaped tube with λb=0.5, Bi=1.0

Grahic Jump Location
Figure 7

Dimensionless temperature plotted as a function of Biot number and the dimensionless coordinate λ=r∕L for (a) oval and (b) lenticular shaped tubes

Grahic Jump Location
Figure 8

Shaped tube efficiency plotted as a function of Biot number and λb for (a) oval shaped tube and (b) lenticular shaped tube

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In