12-30-2014, 09:57 AM | #11 | |
Join Date: Sep 2004
Location: Canada
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
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12-30-2014, 02:36 PM | #12 | |
GURPS FAQ Keeper
Join Date: Mar 2006
Location: Kyïv, Ukraine
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
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12-30-2014, 03:40 PM | #13 |
Join Date: May 2005
Location: Oz
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
With those covered canteens you can use non-potable water for cooling.
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12-30-2014, 03:55 PM | #14 |
GURPS FAQ Keeper
Join Date: Mar 2006
Location: Kyïv, Ukraine
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
Regarding the '12°' claim from the video: found a mention elsewhere where it says the bags keep the water 12° cooler than the environment, which looks more realistic.
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12-30-2014, 04:02 PM | #15 |
Night Watchman
Join Date: Oct 2010
Location: Cambridge, UK
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
That sounds a lot more plausible. I'm a bit surprised that cool water gives +1 to some specialisations of Survival (it would certainly be nice to have) but I presume the authors of Low-Tech had sources for that.
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12-30-2014, 04:18 PM | #16 |
Join Date: Aug 2005
Location: Cowtown, Canada
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
I imagine it would help ward off heat stroke. Drinking fluids is a quick way to raise or lower your body temperature if said fluids are hot or cool respectively. The heat transfers quickly through your gut.
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12-30-2014, 04:19 PM | #17 |
GURPS FAQ Keeper
Join Date: Mar 2006
Location: Kyïv, Ukraine
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
With my current build, I half-wish that it gave +1 to HT rolls for resisting FP loss to heat (an effective 15 and an effective 16 are a big difference in terms of how long it becomes possible to go without trouble if the checks become more frequent than hourly).
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12-30-2014, 05:05 PM | #18 | |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
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Note that, fundamentally, an evaporative container is just 'pre-sweating' -- if you evaporate a bit of water to cool the rest of the water and drink the cooled water, the effect on body temperature is the same as drinking the entire amount of water and sweating an extra amount equal to the amount you would evaporate. The advantage being that there's a limit to how much you can sweat, and the pre-cooling gets around that limit. |
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12-30-2014, 05:27 PM | #19 | |
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Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
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It feels wonderful, but that's purely psychological which is nothing to sneeze at of course. Often times, morale is what separates the haggard from the hopeless and soon dead. Also, heat stroke is potentially lethal dehydration not overheating. Healthy humans are exceptionally resistant to heat stress assuming enough water.
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12-30-2014, 07:46 PM | #20 | |
Join Date: May 2005
Location: Oz
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Re: [Low-Tech] [High-Tech] Portable cooling: higher-TL replacement of water jugs?
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Suppose a 68 kg man drinking half a litre of water 12 K cooler than today's ambient temperature hereabouts, which is 28 C in the shade. That's 16 C compared to say 37 C core temperature of a heat-distressed bushman: 21 K times half a kilo over 68 kg = 0.15 K. Not a huge amount, but physiologically significant.
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Tags |
cooling, desert, high-tech, jungle, low-tech, survival |
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