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

Table 7. Final Model Parameters determined through Calibration.
C6 Thermal Test C9 Thermal Test
Foam Fire Start (ts) 20 minutes 30 minutes
Foam Fire End (te) 40 minutes 50 minutes
Foam Fire Factor (χ) 0 .14 0.32
Heat Transfer Coefficient (hb) 5.5 W/m 2 ◦ K 7.0 W/m 2◦ K
Emissivity (% of tabulated ) (ɛ) 0.20 0.20
Cooling Air Temp 40 ◦ F 40 ◦ F
Table 8. System Properties Predicted from Thermal Calibration Tests.
C6 Test C9 Test
Foam Fire Duration 20 minutes 20 minutes
Foam Fire Heat Generation 117,628 W/m 3 260,460 W/m 3
Max. Flange Temp. ( Predicted) 345.0 ◦ F 465.7 ◦ F
Max. Flange Temp. ( Experimental) 344.7 ◦ F 465.0 ◦ F
thermal experiments is seen in fire factor, χ. The fire factor determined in the C9 thermal
test is 0.32, a value larger than the value of 0.14 determined in the C6 thermal test. This
implies that the foam released more energy in the C9 test which may be a consequence of
the higher temperature reached by the polyurethane foam layer due to the higher shroud
temperature.
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