it's just an evaporative cooler. You can work out the heat used and the rate of water evaporated, knowing the air temp (and water temp) and the rel. humidity.

It would be more effective in hot dry climates than in hot humid climates.

Neither conditions can be found this summer up here on Vancouver Island. Max temp so far has been only around 27 C.

alistair

On 2011-07-29, at 6:06 PM, Dave Mcneely wrote:

> Nope, just asking a pertinent question.  Follow up is up to you, or not.  mcneely
> 
> ---- Vanagon <camping.elliott@gmail.com> wrote:
>> What-you're giving me a homework assignment?
>> 
>> Sent from my smartphone with tiny screen & even tinier keypad.
>> 
>> On Jul 29, 2011, at 5:41 PM, <mcneely4@cox.net> wrote:
>> 
>>> Sure, it will work.  Have you done any experimentation to determine just how cold this "refrigerator" will be compared to ambient, at different relative humidity values?  mcneely
>>> 
>>> ---- Rocket J Squirrel <camping.elliott@GMAIL.COM> wrote:
>>>> Possibly of interest for camping. Assuming that one needs a way to cool
>>>> something down, like a couple bottle of wine, doesn't have an ice chest
>>>> or refrigerator, but does have two terra-cotta flower pots, some sand,
>>>> some water, and a towel. A fairly unlikely scenario, sure, but hey!
>>>> Amaze your friends!
>>>> 
>>>> <http://lifehacker.com/5825676/create-an-electricity+free-refrigerator-with-some-flower-pots-and-sand>
>>>> 
>>>> --
>>>> RJS
>>> 
>>> --
>>> David McNeely
> 
> --
> David McNeely