Wood Beam and Supports
Heat Trace Pipe
Figure 1. Cross sections of two utilidors constructed in the Arctic. (After U.S. Army 1987.)
Utilidor sizes and shapes are determined by considering the number and sizes
of the pipes they will contain, their location relative to the ground surface, and the
ease of access desired for maintenance or repairs. Phetteplace et al. (1981) presented
the utilidor and pipe sizes for all the utilidors located on Fort Wainwright, Alaska.
They reported approximately 200 different configurations; utilidor sizes ranged
from 1 ft 1 ft to 7 ft 9 ft, and pipe sizes varied from 1 in. to 24 in. in diameter.
Clearly, it is not possible to conduct physical experiments using every combina-
tion of utilidor size and pipe combination.
sures, specifically rectangular utilidors containing one or more heated pipes. The
work presented considers the steady-state, two-dimensional problem of convec-
Go to Contents