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Old 08-08-2007, 04:57 PM   #21
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There's a good chance you'll end up with a lot of water in the cooler over a long trip even if the ice is in a perfectly waterproof bag, especially if the cooler is not airtight or you open it frequently. If the ice bag external surface temp is below the dew point of the air in the cooler, then there will be condensation on the bag. The water will drip off and collect in the bottom of the cooler. The water won't evaporate very quickly or at all since the RH in the cooler will be close to 100%. Your use of a slightly insulating dry bag for the ice might overcome this problem since the surface of the ice bag might not get below the dewpoint of the air in the cooler.

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Old 08-20-2007, 05:02 PM   #22
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Why not do a 180, and store the food in a waterproof container...
This is what I've been doing, thanks HFWR. I just tilt/dump out the water in the grocery store parking lot and throw the new ice in. All the ice melts after 1-2 days, but today I bought a 9 pound block -- we'll see how that goes.

Sure gets hot around here (I'm in San Clemente right now).

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Old 08-21-2007, 02:09 PM   #23
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Let me guess.
Air leaks in cooler?
Now I know you are extremely scientific in your measurements since you are a musician.

When you have flooded the cooler with melted ice water, the air volume is much reduced so heat conduction by air leakage is reduced.
But with a nice tidy plastic baggy there is alot more air in the box, a different environment all together.
You may even be peaking in there more to check how your snazzy idea is working and made it worse.

That's how your AC work.

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