Phase Change Around Insulated Buried Pipes: Quasi-Steady Method

[+] Author and Article Information
V. J. Lunardini

U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, N.H. 03755

J. Energy Resour. Technol 103(3), 201-207 (Sep 01, 1981) (7 pages) doi:10.1115/1.3230839 History: Received November 01, 1980; Revised June 01, 1981; Online October 22, 2009


The heat transfer problem for cylinders embedded in a medium with variable thermal properties cannot be solved exactly if phase change occurs. Approximate solutions have been found using the quasi-steady method. The temperature field, phase change location, and pipe surface heat transfer can be estimated using graphs presented for parametric ranges of temperature, thermal properties, burial depth, and insulation thickness. The accuracy of the graphs increases as the Stefan number decreases and they should be of particular value for insulated hot pipes or refrigerated gas lines.

Copyright © 1981 by ASME
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