TM 5-852-5/AFR 88-19, Volume 5
tions, in addition to the implied time-independent
culating the thermal resistance of typical shapes and
steady-state assumptions, are indicated. Some
bodies. Equations are given in figure 12-4 for
comments intended to facilitate application of the
estimating the temperature drop (or gain) along a
equations are also included. Where applicable,
pipeline system, and simple procedures to determine
procedures are given for relevant thermal resistance,
freeze-up times under no-flow conditions are
rates of heat flow and insulation thicknesses.
included.
(2) Figure 12-6 gives similar information for
(4) To facilitate computation, numerical
uninsulated and insulated buried pipes. In each of
values for certain variables in some of the calcula-
these two cases, the presence of thawed ground
tions may be read directly from figures 12-8, 12-9
around the pipe is considered, and equations are
and 12-10. These curves present a partial solution
included to determine the dimensions of the result-
for some of the heat loss equations. Their use is
demonstrated in paragraphs 12-9d and f.
ing thaw cylinder.
(3) Figure 12-7 presents procedures for cal-
12-12
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