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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attributed to the fact that solar insolation effects are present only during the later portion <strong>of</strong><br />
the thermal test when the flange temperature has already reached its maximum. As in the<br />
cooling temperature scenarios, the C9 thermal test provided a conservatively high estimate<br />
<strong>of</strong> the maximum flange temperature. A final simulation was also conducted using the worst<br />
possible conditions. Here a 120 W/m 2 internal heat source was used with cooling in a<br />
120 ◦ F environment under a solar flux <strong>of</strong> 300 W/m 2 . Again the C9 thermal test provided a<br />
conservative measure <strong>of</strong> the maximum flange temperature.<br />
The previous analysis indicates that the maximum flange temperature determined in the<br />
C9 thermal test on pre-heated empty shipping containers is greater than the temperature<br />
expected for filled containers with an internal heat source. Additionally, the analysis showed<br />
that the C9 thermal tests, as performed, overpredicts the maximum flange temperature<br />
reached in a number <strong>of</strong> different scenarios that meet or exceed Federal regulations. The<br />
flange temperature served as a measure <strong>of</strong> the temperature reached by the O-ring which<br />
is the most temperature sensitive part <strong>of</strong> the shipping container. The extent to which the<br />
C9 thermal test overpredicted the maximum flange temperature decreased with time. The<br />
speed at which this process occurred depended on the thermal boundary conditions present.<br />
It was also determined that the flange temperature is most sensitive to the heat generated<br />
by the foam fire, a phenomena that is taken into account in a crude but effective manner<br />
in this analysis.<br />
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