gilmore wrote:pokiedot, I want to be able to use blue packs for a mobile cooler (aka playmate) and couldn't think of how to pull it off. PLEASE provide more details about the 'two cooler dry ice method' .
How big was your dry ice cooler???
How big was your the 2nd cooler???
How much dry ice???
How many blue packs???
certainly, the two cooler dry ice method would work really great for this purpose, you'll be able to re-freeze your blue ices and pop them in your playmate. so to answer your questions:
both of our coolers are i think 16 qts? smallish. sorry i don't know the exact specs, the coolers are up in my storage loft right now, and i have a broken foot, so i'm looking up at them right now, trying to guestimate.
we used 4-5 blocks of dry ice, which we buy at crystal ice in reno. (look here for directions and info about crystal ice: http://www.burningman.com/preparation/e ... water.html
). we wrap the dry ice blocks in those silver emergency blankets, and duct tape them to keep them nice and insulated. i've also heard recommendations of keeping an absorbant material like a towel in the cooler, to absorb any moisture.
we have about 6 bags of blue ice. the dry ice cooler will freeze about 2 at a time. sometimes the emergency blankets insulate it too well. if you find that your blue ice isn't freezing, poke a few holes in the emergency blanket. we get very obsessive about finding the right balance of freezing capacity vs dry ice loss, it's funny.
so, like i mentioned, the whole swapping blue ice scene is a little bit of a production. the object of the game is to keep the dry ice cooler open for as little time as possible. also, be sure to dry off your melted dry ice packs really well, as any drop of moisture will eat at your dry ice. we duct tape our dry ice cooler shut, too, to create an even better seal on the cooler. hell, we kind of duct tape everything out there. anyways.. we do this swap about once a day, rotating the two meltiest blue ices into the dry ice cooler, with the other four in our food cooler. works pretty well.
hope that helps!