Thermal Analysis of a H1616 Shipping Container - prod.sandia.gov ...
Thermal Analysis of a H1616 Shipping Container - prod.sandia.gov ...
Thermal Analysis of a H1616 Shipping Container - prod.sandia.gov ...
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Temperature (F)<br />
2000<br />
1800<br />
1600<br />
1400<br />
1200<br />
1000<br />
800<br />
600<br />
400<br />
200<br />
0<br />
0 20 40 60 80 100 120 140 160 180 200<br />
Time (min)<br />
Shroud Temperature (ISSIM1)<br />
Flange Temperature (ISSIM1)<br />
Shroud Temperature (C9SIM)<br />
Flange Temperature (C9SIM)<br />
Figure 27. Temperature Histories for Simulated <strong>Thermal</strong> Tests (C9SIM vs. ISSIM1).<br />
The first scenario exploring the effects <strong>of</strong> solar InSolation is labeled, ISSIM1. In this<br />
scenario, the CTSIM1 scenario is repeated using a solar flux <strong>of</strong> 143.44 W/m 2 . The initial<br />
steady-state temperatures pr<strong>of</strong>ile reached before exposure to the intense heating source is<br />
the same as the CTSIM1 scenario. A comparison between the shroud and flange temperatures<br />
for the complete thermal test is shown in Figure 27. The maximum flange temperature<br />
predicted in the ISSIM1 scenario is 444.16 ◦ F which is 0.84 ◦ F greater than the 443.32 ◦ F predicted<br />
in the CTSIM1 scenario. As with the ambient cooling temperature, solar insolation<br />
effects are seen to have a minimal impact on the maximum flange temperature. The C9SIM<br />
scenario is able to give a conservatively high value for the maximum flange temperature.<br />
Figure 28 provides a longer look at the thermal simulation and shows the cross over point<br />
to be at approximately 235 minutes. The effects <strong>of</strong> including solar insolation are seen in the<br />
final temperature reached toward the end <strong>of</strong> the thermal test. The temperature difference<br />
between the two scenarios is plotted in Figure 29 for both the shroud and flange temperatures.<br />
At the time <strong>of</strong> the maximum flange temperature, the difference between the C9SIM<br />
and ISSIM1 scenarios is 22.24 ◦ F.<br />
A conservatively high value <strong>of</strong> the insolation effects is evaluated in a second scenario.<br />
This scenario is labeled ISSIM2 and is similar to the CTSIM1 scenario with the exception<br />
that a solar flux <strong>of</strong> 300 W/m 2 , a value approximately twice that <strong>of</strong> the value specified by the<br />
Federal regulations, is used. A comparison between the shroud and flange temperatures for<br />
35