Final design
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The document describes the final design and testing of a device to keep ice cold using biodegradable packing peanuts. It includes three layers: an outer wood box, an inner lining, and a small filled space between with loose biodegradable packing peanuts. Testing showed the ice remained 16 degrees Celsius cooler than the starting temperature over 3 hours, demonstrating better insulation than an earlier prototype.
Final design
- 1. The Final Design! (Whew) By Richard Soucy
- 3. Rationale I built the box with loose fill biodegradable biodegradable packing peanuts instead of gluing them in because when I glued them in, they shrunk due to the fact they are water soluble. I filled the box with biodegradable packing peanuts because the biodegradable packing peanuts have insulation properties. I used two layers because that way the water from the ice couldn't find a way into the doggie bag and disintegrate the packing peanuts. (The glue only makes it shrink because of the low water content. I used wood glue instead of normal glue because it is a stronger bond and it is water soluble only under boiling water. I used a lining on the packing peanuts because I a drop or so of water came out then it would start a small chain reaction that would biodegrade all the packing peanuts. I used a small area for the packing peanuts so there would be no air for convection.
- 4. Final Results Temp Of Ice Over Multiple hours 15 Temperature in Degrees Celsius 10 10 15 12 5 0-1 0 0 0 -5 Start 0.5 hour 1 hour 1.5 hour 2 hour 2.5 hour 3 hr Difference: 16°C
- 5. Prototype Results Temp Of Ice Over Multiple hours 8 Temperature in Degrees Celsius 6 6.5 4 4 5 2 0 0 0 0 0 0 0 0 0 t 0 ar r 0 0 ou r St ou r 1h 3h r 2h 4h r 5h r 6h Difference: 1°C
- 6. Comparing Results Prototype Final Design 16 7 15 6.5 14 6 12 12 5 10 10 5 Temperature in Degrees Celsius Temperature in Degrees Celsius 8 44 6 3 4 2 2 0 1 0 0 0 -1 -2 0 0 0 0 0 0 0 0 Start 0 0 0 0 1 hour 2 hour t ar r ou 3 hr St r 4h r 2h 6h