0
Research Papers

Experimental Investigation on Freezing of Water Falling Film on Vertical Bank of Cold Horizontal Tubes

[+] Author and Article Information
Ahmed Hussain

Mechanical Engineering Department,
King Abdulaziz University,
05 Al Tahlia Street,
Rabigh 21911, Saudi Arabia

Abduzahir M. Selim

Mechanical Technology Department,
Jeddah College of Technology,
05 King Khalid Street, Jeddah 21494, Saudi Arabia

Manuscript received November 22, 2011; final manuscript received February 12, 2012; published online October 17, 2012. Assoc. Editor: Zahid Ayub.

J. Thermal Sci. Eng. Appl 4(4), 041006 (Oct 17, 2012) (7 pages) doi:10.1115/1.4006314 History: Received November 22, 2011; Revised February 12, 2012

The heat exchangers for ice formation on tube essentially consists of cold pipes submersed in stagnant water or in a cross flow of water. The heat exchanger considered here is a falling film one. Water falling film falls down over a set of vertical in-line cold horizontal tubes. The falling film main modes are droplets, jets, and sheet depending on its flow rate. The tubes are internally cooled by a controlled subzero temperature coolant. The coolant passes through the pipes in parallel. Water falling film freezes gradually outside the test tubes. The quantity of ice formed on the test tubes is observed, photographed, and measured at different times for different falling film modes. It has been noticed that the rate of ice formation decreases with time as ice accumulates on the test tubes. The overall heat transfer coefficient decreases as more ice accumulates on the test tubes.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by ASME
Your Session has timed out. Please sign back in to continue.

References

ASHRAE, 1993, Design Guide for Cool Thermal Storage , American Society of Heating Refrigeration and Air Conditioning Engineers, Atlanta, GA.
Hu, X., and Jacobi, A. M., 1996, “The Intertube Falling Film: Part 1—Flow Characteristics, Mode Transitions and Hysteresis,” ASME J. Heat Transfer, 118, pp. 616–625. [CrossRef]
Hu, X., and Jacobi, A. M., 1996, “The Intertube Falling Film: Part 2—Mode Effects on Sensible Heat Transfer to a Falling Liquid Film,” ASME J. Heat Transfer, 118, pp. 626–633. [CrossRef]
Roques, J. F., and Thome, J. R., 2003, “Falling Film Transitions Between Droplet, Column and Sheet Flow Modes on a Vertical Array of Horizontal 19 FPI and 40 FPI Low Finned Tubes,” Heat Transfer Eng., 24(6), pp. 40–45. [CrossRef]
Ruan, B., Jacobi, A. M., and Li, L., 2009, “Effects of a Countercurrent Gas Flow on Falling-Film Mode Transitions Between Horizontal Tubes,” Exp. Therm. Fluid Sci., 33, pp. 1216–1225. [CrossRef]
Li, W., Wu, X.-Y., Luo, Z., Yao,S.-C., and Xu, J.-L., 2011, “Heat Transfer Characteristics of Falling Film Evaporation on Horizontal Tube Arrays,” Int. J. Heat Mass Transfer, 54(9-10), pp. 1986–1993. [CrossRef]
Intemann, P. A., and Kazmierczak, M., 1997, “Heat Transfer and Ice Formation Deposited Upon Cold Tube Bundles Immersed in Flowing Water, Convection Analysis,” Int. J Heat Fluid Flow, 40(3), pp. 557–572. [CrossRef]
Cliché, A., and Lacroix, M., 2006, “Optimization of Ice Making in Laminar Falling Films,” Energy Convers. Manage., 47, pp. 2260–2270. [CrossRef]
Intemann, P. A., and Kazmierczak, M., 1994, “Convective Heat Transfer for Cold Tube Bundles With Ice Formations in a Stream of Water at Steady State,” Int. J. Heat Fluid Flow, 15, pp. 491–500. [CrossRef]
Perry, R. H., 1984, Chemical Engineering Handbook, 6th ed ., R. H. Perry, and D. Green, eds., McGraw-Hill, New York.
Incropera, F. P., and DeWitt, D. P., 2001, Introduction to Heat Transfer, 4th ed., Wiley, New York.
Kazmierczak, M., and Intemann, P. A., 1997, “Heat Transfer and Ice Formation Deposited Upon Cold Tube Bundles Immersed in Flowing Water-II, Conjugate Analysis,” Int. J Heat Fluid Flow, 40(3), pp. 573–588. [CrossRef]

Figures

Grahic Jump Location
Fig. 4

A schematic of the tubes within the test section, liquid issues from the upper holed feeding tube, flows around a lower feeding tube that help ensure flow uniformly, and then falls through the test section, as was used by Hu and Jacobi [2,3-2,3]

Grahic Jump Location
Fig. 3

Schematic of the experimental setup of the test rig

Grahic Jump Location
Fig. 2

Tube section details as it was done by Intemann and Kazmierczak [9]

Grahic Jump Location
Fig. 1

The idealized intertube falling film modes, as mentioned by Hu and Jacobi [2,3-2,3]

Grahic Jump Location
Fig. 5

Front view photo of ice accumulation on the test tubes

Grahic Jump Location
Fig. 6

Side photo of ice accumulation on the test tubes

Grahic Jump Location
Fig. 9

Comparison of the formed ice between droplet, jet, and sheet mode for m•c = 0.32 kg/s

Grahic Jump Location
Fig. 7

Ice mass formation for: Coolant flow rate m•c = 0.162 kg/s and jet mode versus time

Grahic Jump Location
Fig. 8

Comparison between ice quantity for m•c = 0.16 kg/s and m•c = 0.38 kg/s

Grahic Jump Location
Fig. 10

Variation of the overall heat transfer coefficient with ice quantity for m•c = 0.38 kg/s

Grahic Jump Location
Fig. 11

The effect of falling film flow rate (droplets, jets, and sheet modes) on heat transfer coefficient

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