Thermal Analysis of a H1616 Shipping Container - prod.sandia.gov ...

Temperature (F)
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Time (min)
Shroud Temperature (ISSIM1)
Flange Temperature (ISSIM1)
Shroud Temperature (C9SIM)
Flange Temperature (C9SIM)
Figure 27. Temperature Histories for Simulated Thermal Tests (C9SIM vs. ISSIM1).
The first scenario exploring the effects of solar InSolation is labeled, ISSIM1. In this
scenario, the CTSIM1 scenario is repeated using a solar flux of 143.44 W/m 2 . The initial
steady-state temperatures profile reached before exposure to the intense heating source is
the same as the CTSIM1 scenario. A comparison between the shroud and flange temperatures
for the complete thermal test is shown in Figure 27. The maximum flange temperature
predicted in the ISSIM1 scenario is 444.16 ◦ F which is 0.84 ◦ F greater than the 443.32 ◦ F predicted
in the CTSIM1 scenario. As with the ambient cooling temperature, solar insolation
effects are seen to have a minimal impact on the maximum flange temperature. The C9SIM
scenario is able to give a conservatively high value for the maximum flange temperature.
Figure 28 provides a longer look at the thermal simulation and shows the cross over point
to be at approximately 235 minutes. The effects of including solar insolation are seen in the
final temperature reached toward the end of the thermal test. The temperature difference
between the two scenarios is plotted in Figure 29 for both the shroud and flange temperatures.
At the time of the maximum flange temperature, the difference between the C9SIM
and ISSIM1 scenarios is 22.24 ◦ F.
A conservatively high value of the insolation effects is evaluated in a second scenario.
This scenario is labeled ISSIM2 and is similar to the CTSIM1 scenario with the exception
that a solar flux of 300 W/m 2 , a value approximately twice that of the value specified by the
Federal regulations, is used. A comparison between the shroud and flange temperatures for
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