If you used a bag resivoar to control pressure AND a styrofoam box to control temperature (set the box inside the bag and add a single hole to the top) the dry ice should last some time, especially if the bag can be kept in a cool place. Like I said, it is IMPERITAVE that you use large chunks of dry ice, crushed dry ice evaporates much faster.
Dry Ice Creativity
- Thread starter boiceboy
- Start date
If I was going to try and make something like this I guess I would take a 5 gal bucket a jumbo jar like a family size jar of peanut butter that you can get a sams club. 10 cans of self expanding foam some tubing & some silicone.
1: Eat 50 PB&J Sandwiches
2: Clean jar
3: Drill 1/4 Inch hole in lid insert air line
4: Silicone both sides very well
5: Run air line out the hole.
6: Fill 5 Gal bucket about 2/3 way full of expanding foam
7: Insert jar into foam before it sets up be care full to leave the threads on the jar above the foam.
8: Let foam setup while arm fall a sleep from holding jar
9: Put lid on jar & Drill a 1/4 inch hole in the 5 Gal bucket right at the level of the top of the foam.
10: Run air line out of the 5 gal bucket
11: Place a garbage bag into the top of the bucket
12: Fill that with foam up to about 1 inch from the top of the bucket
13: Let foam setup
14: Take top "foam plug" out of the bucket and put a big chunk of dry ice in to the jar.
15: quickly put everything back together and enjoy. Hopefully...
I Would guess that the amount of co2 the dry ice gives off will be fast at first then slow down as everything begins to cool down inside the bucket.
Hopefully you have someplace to hide the bucket I don't think it would make a nice addition to the room decor...
1: Eat 50 PB&J Sandwiches
2: Clean jar
3: Drill 1/4 Inch hole in lid insert air line
4: Silicone both sides very well
5: Run air line out the hole.
6: Fill 5 Gal bucket about 2/3 way full of expanding foam
7: Insert jar into foam before it sets up be care full to leave the threads on the jar above the foam.
8: Let foam setup while arm fall a sleep from holding jar
9: Put lid on jar & Drill a 1/4 inch hole in the 5 Gal bucket right at the level of the top of the foam.
10: Run air line out of the 5 gal bucket
11: Place a garbage bag into the top of the bucket
12: Fill that with foam up to about 1 inch from the top of the bucket
13: Let foam setup
14: Take top "foam plug" out of the bucket and put a big chunk of dry ice in to the jar.
15: quickly put everything back together and enjoy. Hopefully...
I Would guess that the amount of co2 the dry ice gives off will be fast at first then slow down as everything begins to cool down inside the bucket.
Hopefully you have someplace to hide the bucket I don't think it would make a nice addition to the room decor...
Couldn't you just use something like a 1-4 gallon water thermos / cooler with an airtight hose connection tapped into it? You'd have to play around with the amount of dry ice you put in it, but after a while you should be able to figure it out. A thermos is usually air-tight and very well insulated. If your house stays within a 5-8 degree variation, the thermos should remain constant temp pretty much all the time. Especially with dry ice in it.
Go to the goodwill store and buy a cheap used thermos, drill and glue some rigid air tube in the top, wrap a ton of tefon tape on the threads of the lid (if it's a screw-lid type), put a half a cup of dry ice in it, put the lid on, dump the other end of the line in the tank, and see how much it bubbles over the next few hours/days.
Go to the goodwill store and buy a cheap used thermos, drill and glue some rigid air tube in the top, wrap a ton of tefon tape on the threads of the lid (if it's a screw-lid type), put a half a cup of dry ice in it, put the lid on, dump the other end of the line in the tank, and see how much it bubbles over the next few hours/days.
yeah, if you did put dry ice in a thermos, put like 15 saftey release valves on it at different places. if the hose got clogged, you would have a VERY powerful explosion that would put holes in your wal, weaken what oyour tank is sitting on and shatter the tank and you'd have afragments of glass embedded all over. not pretty 
Gee folks, reminds me of the story just before Y2K when a guy packed beans and rice in PVC tubes and felt the need to put dry ice in each tube. he then placed them in his garage until new years. His timing was off, but the fireworks were fabulous.
Seriously though, if you have a dialy available supply of dry Ice, use heavy duty ballons T-eed in to your air line as accumulators, small amount of pressure large volume. figure out the regulation for release into the tank, and then you can let the dry ice melt, and fill the balloons then as the co2 is used the balloons deflate. The big question is where to hide it. The worst thing that could happen if you make a mistake would be a loud bang, and a loss of some co2. BTW remember if you lose large volumes of CO2 in an enclosed space it would be best not to go in a try to breathe right away. Co2 is obviously harmeless to breathe, but it disperses O2 and can suffocate you harmless or not.
dave
Seriously though, if you have a dialy available supply of dry Ice, use heavy duty ballons T-eed in to your air line as accumulators, small amount of pressure large volume. figure out the regulation for release into the tank, and then you can let the dry ice melt, and fill the balloons then as the co2 is used the balloons deflate. The big question is where to hide it. The worst thing that could happen if you make a mistake would be a loud bang, and a loss of some co2. BTW remember if you lose large volumes of CO2 in an enclosed space it would be best not to go in a try to breathe right away. Co2 is obviously harmeless to breathe, but it disperses O2 and can suffocate you harmless or not.
dave
If you have a line tapped into the thermos, there would be no explosion-- c'mon, do you really think anything is going to clog cheap rubber tubing enough to blow up a thermos?
It is done routinely with DIY CO2, why should it be unthinkable with dry ice, which is many times as hazardous?
