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Posted by Kris Krieger on November 27, 2007, 1:58 pm
>
>
> Kris Krieger wrote:
>
>>"
>>
>>I think it's one of those things invented by desert dwellers - I've
>>seen a good number of pics of them from places like Morocco and Egypt.
>>
>>
>>I experienced a similar ffect in SOuthern CA - the LA Botanical
>>Gardens are a bit inland, so rather dry as well as quite warm. THere
>>is an old stable building on th egrounds, two story with a big vented
>>steple on top. One day we went, and the temp outside was in th eupper
>>90's - but inside the building, it felt downright chilly, between the
>>shade and the venting effect.
>>
>>THe tricky thing is a hot and *wet* climate, such as here in the
>>Houston area. I don't know wheher such methods are applicable here.
>>But in a hot and dry climate, many passive cooling methods seem to
>>work quite well.
>>
>>
> Since i live in a hot/wet a lot of the year, I think the key is
> dehumidification with the water produced by the process soemhow
> filtered back into a system for at least watering lawns if not doing
> laundry
>
But how do you passively dehumidify a space? THe vents under discussion
are passive cooling devices in hot, dry climates. If the humidity outside
is 80% and the temp is the same as body temp (as can happen here in the
Houston, TX area), how can a space be *passively* dehumidified? THat's the
point I was suggesting. THe "wind catchers"/Bernoulli vents work well in
the desert, but in hot and wet weather, all they do is move around wet, hot
air (assuming the air *is* moving...) I'd be really interested in passive
dehunmidification...
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