On 1/24/2012 3:25 PM, Jim Henderson wrote:
> On Tue, 24 Jan 2012 15:12:43 -0700, Patrick Elliott wrote:
>
>> On 1/23/2012 5:53 PM, Jim Henderson wrote:
>>> On Mon, 23 Jan 2012 12:22:44 -0500, Aydan wrote:
>>>
>>>> Invisible<voi### [at] devnull>   wrote:
>>>>> Actually, going back to my previous point: The amount of /moisture/
>>>>> emitted by a normal human is absurdly small. And yet, put enough of
>>>>> them in a room, and it can get astonishingly moist in there! o_O
>>>>
>>>> I just had a look in Wikipedia:
>>>> 1m³ of air at 20 can carry roughly 30ml of water (as vapour).
>>>> 1 human sweats about 400ml to 1l per day.
>>>> Since "normal" room air usualy has about 50% humidity that leaves
>>>> about 15ml/m² for the sweat. That would mean 1 human can saturate 1 -
>>>> 2.5 m³ of air per hour.
>>>> Now you just need the number of people and the size of the room to
>>>> know how fast it saturates.
>>>
>>> You'd also need to know the current relative humidity to know how
>>> saturated it is before you start adding people to the room.
>>>
>>> 0% humidity is quite rare - in fact, I don't know that it's possible on
>>> Earth other than in an artificial environment.  I live in a desert
>>> climate (though not in the desert), and while we do easily hit below
>>> 20%
>>> relative humidity, we don't hit 0.  (In fact, it's snowing right now)
>>>
>>> Jim
>> Cave system near here is.. damn close. Was going to be used as a bomb
>> shelter, by the government, but, frankly, they would have had to store
>> 20 times the water they still have down there to survive it. You can
>> definitely tell there is next to no water in the air while there.
>
> Vegas reportedly sees a low-ish average of 11%.  As I recall, you're not
> far from there (south, I think), about equidistant from Phoenix and Vegas?
>
> Jim
Yeah, but this underground system also has "zero" water in it, and the 
rock seems to suck up what little comes in from outside, so.. its pretty 
damn nasty.

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