I would like build a package with frozen food products (to -18 °C). The products are small balls of pizza dough (diameter of 4 cm). Total dough ball weight is 10 kg (333 balls, 30 grams each).
I'm going to put them into a styrofoam package with dry ice (sealed and insulated) that has inner dimensions 33 x 23 x 28 cm and a wall thickness of 3.5 cm. The dough balls will be stored from 2 to 5 days.
The data for the dry ice:
- 16 mm granules
- Sublimation temperature: -78.5 °C
- Density: 1.1 - 1.4 g / cm^3
External temperature where the box is stored:
a) 10 °C.
b) 21 °C.
How much dry ice should I include to have all balls still frozen, i.e. have them in a temp. around -2°C, in the case when:
a) time of storage = 3 days
b) time of storage = 5 days