I think it's a matter of time. Enough insulation will keep it from freezing for a while, but the contents will eventually get to the ambient air temperature. How long do you need it to stay liquid?
Posts: 9096 | Location: The Red part of Minnesota | Registered: October 06, 2002
Thanks guys, For a while. Have to haul water at times and leave it. Was hoping there was some kind on new technology type container that would somehow keep it from freezing. Guess not.
Isn't there something from high school chemistry that says if you put the water under pressure it won't freeze at 32 F , but a lower temp depending on how much pressure?
Or, maybe add a hint of salt or something else to the water?
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Posts: 11212 | Location: 45 miles from the Pacific Ocean | Registered: February 28, 2003
Hello ORC, cheap solar panel (HF) wired to a used battery eating pad placed under the container may work.
****************************************************W5SCM "We the people are the rightful masters of both Congress and the courts, not to overthrow the Constitution but to overthrow the men who pervert the Constitution" - Abraham Lincoln
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Posts: 1143 | Location: Little Rock, AR | Registered: January 22, 2003
Containers made from certain radioactive materials would be able to stay warm for thousands of years. However, there would be other side effects shall we say. Was personal longevity an important consideration for you?
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Posts: 17607 | Location: Northern Virginia | Registered: November 08, 2008
Originally posted by radioman: Isn't there something from high school chemistry that says if you put the water under pressure it won't freeze at 32 F , but a lower temp depending on how much pressure?
There might be some good theory there, but I don't know if it would be practical. First of all, it would be a vacuum, not pressure, to lower the freezing point of water. You'd need a setup capable of pulling, say, 1/1000 atm, that would protect from freezing down to about -25C.
1 mbar is basically outer space already, at least for our purposes. Might as well go for a perfect vacuum. That would be some pretty serious lab equipment.
