Tips on making an ice cube frozen for about 5-7 hours?????

peilin

New member
It's a school thing and I can make an ice cube frozen for 3 hours and you can only use household materials which means NO buying other stuff from stores and other places. THe container also has to be less than 14x14 Inches. My container is a normal box with tin foil wrapped around it and some styrofoam in the box. It's ok...... ANY TIPS THO???????????(P.S. TY for the help)
 

BPTDVG

New member
The keys are insulation and a hard freeze.Make sure the ice cube is in the bottom of the freezer and the freezer is set to the lowest setting. You'll want to put the insulating materials in the freezer too. This will remove any heat that will melt the ice cube. Wrapping the ice cube in several layers of cotton will act as a good insulator.
 

Jeff

New member
There are two main types of heat transfer, convection and conduction. You need to try to prevent both of those. Air by itself is a very poor conductor of heat. This means that it is a good insulator. But, it can allow a lot of convection. To prevent this, you need to isolate the air into small pockets (like a foam). The first thing that came to my mind that you would easily find around the house would be a sponge. If you surrounded your ice cube by a few sponges that would work well (hopefully you can find enough to line the walls). I bet that would do very well at insulating your ice cube. Good luck
 

William

New member
SAWDUST: I spent many a summer growing up on a lake in Maine and sometimes a week or so during Christmas. Our site was next to an old saw mill where there was acres upon acres of saw dust piled about 3 stories high. The locals would take a tractor out on the lake during winter and cut huge blocks of ice from the frozen lake. The large blocks were then dragged back to the saw mill and stacked. After stacking the ice they covered it with plastic tarps and buried them in saw dust. During the summer months they would remove the ice and sell it to the fisherman for their catch. The blocks never thawed out during the summer and there was little water if any as a result of melting. I told a neighbor of mine about it and he laughed and told me I was full of #$%^. One July day I took a 30 gallon plastic trash barrel and filled it with sawdust, I then put a 5 lb bag of ice in the middle and covered it. Two days later he and I removed the bag of ice and there was about 2 ounces of water in the bag. Now he's a believer. Doesnt really amtter what you use for insulation. The ability to trap AIR and hold it determines the "R" factor, and sawdust is high on the R rating. So take your ice cube and put it in a sandwich bag(to keep the sawdust off of it) and stick it in the sawdust pile.
 
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