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Thread: Frozen bottled water

  1. Back To Top    #1

    Join Date
    Jul 2007
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    Suwanee, GA
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    527

    Frozen bottled water

    This past July I stocked my outdoor mini fridge with all types of beverages, water, juice, beer, etc... After a few days I noticed that one of the bottled waters was frozen. Thinking it was the placement in the fridge, I moved it around. I noticed that it still remained frozen, yet nothing else in the fridge was frozen. As the months passed and eventually just about everything was consumed, that one bottle has stayed frozen this entire time. A few days ago, I moved the fridge into the basement. Tonight I took the temperature of the last remaining unfrozen bottled water in there, it was 36 degrees. Same temp for an apple juice that was also in there. What gives, how is this water still frozen?
    Gary
    21k gal SW, IG Gunite PebbleSheen, 1HP Jandy, Jandy 340 filter, Polaris 280, 17' fiberglass slide w/ 2HP pump.

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    mas985's Avatar
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    May 2007
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    Re: Frozen bottled water

    It takes quite a bit of heat to melt ice. In fact, it takes as much heat to melt ice as it would to raise the temperature of an equivalent mass of water by about 144 deg F (i.e. 144 BTU per pound of ice). The problem is that when the fridge is at 36 deg F, it will take a very long time for the ice to absorb enough heat to melt. Heat transfer is proportional to the temperature difference of the materials.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  3. Back To Top    #3

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    Re: Frozen bottled water

    You are seeing why ice boxes used to work before electrical/mechanical refrigeration. As Mark wrote, ice has to absorb a lot of heat in order to melt, so once things are cooled down and is exposed to temperatures not much higher than freezing, it takes a long time to melt. Ice houses stored ice that was harvested in the winter and were insulated such that the ice would last for many months.

    Nevertheless, people do defrost frozen items slowly by putting them into the refrigerator, but unless the refrigerator is unusually warm (closer to 40F instead of 36F), such items only soften up on their surface.

    Even so, I am a bit surprised that your bottle of water didn't melt much over months. I'd at least expect it to have an ice middle and a sloshy outside. Perhaps its container was particularly insulating or maybe the liquid wasn't really water.

    Richard
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  4. Back To Top    #4

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    Re: Frozen bottled water

    Quote Originally Posted by chem geek
    or maybe the liquid wasn't really water.

    Richard


    Maybe it was ... di-hydrogen monoxide
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

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