Doc. No. MO-RKN-3062
Version 1.5: Sep. 08, 2010
23 (38)
DRY ICE CALCULATION
DRY ICE CALCULATION
Calculate Dry Ice Amount for Container Preconditioning
Only authorized persons should perform dry ice calculations. It is strongly recommended to have
Envirotainer perform the calculation.
To calculate the amount of dry ice needed to precondition the container:
1) Note the container temperature (in Celsius) prior to preconditioning. Although using the actual
container temperature is preferred, an estimate based on the ambient temperature is acceptable.
2) Determine the set temperature (in Celsius) of the product.
3) Subtract "set temperature" from "container temperature" to obtain the "temperature difference".
4) Refer to graph (Figure 18) and locate the "temperature difference" on the horizontal axis.
5) Read up vertically on the graph until reaching the line that corresponds to the container type.
6) Read across to the left to obtain dry ice quantity (in Kilograms) from the vertical axis.
7) This is the amount of dry ice required to precondition the container and should added to the dry
ice necessary to maintain the product temperature, which is obtained from the Dry Ice Tables.
Figure 18
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Dry Ice Qty
(kg)
Container starting temp. - Set temp (°C)
