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

Post a reply to this message