Re: Tom's drips

["Lanny Henson" <lanny@roman.net>]

The cooling effect from cooling towers comes from the latent heat of
evaporazition. It takes 1 cal to raise/lower one gram of water 1 degC but
when the liquid water changes phases to water vapor it takes 540 cal to
vaporize 1 gram of water. So divide your heat load by 540 and that is how
many grams of water you need to vaporize. One proven way to vaporize water
in cooling towers is to let the hot water drip down wooden slats.
Lanny

----- Original Message -----
From: Crispin <crispin@newdawn.sz>
To: Stoves <stoves@crest.org>
Sent: Tuesday, January 15, 2002 2:13 PM
Subject: Tom's drips


> Dear Tom, Duke of Burl
>
> Great name!
>
> >The most efficient heat transfer in a cooling tower is achieved by
> >dripping water down the flue. We used trays with holes in the
> >bottom to make the water drops. It looked like rain inside the flue,
> >we took the hot water out of the bottom.
> >
> >Tom Duke
> >Burlingtion Iowa
>
> I have been trying to get cooling towers for manual candle making machines
> and they cost a fortune and are too big.  How do I calculate the heat a
> cooling tower can deal with?  I am talking about one a foot square and 5
> feet high with a fan on top.
>
> The candle making machine has a water jacket around the moulding tubes and
> it can have water manualy pumped through it with a foor or hand pump.  The
> wax an be heated in a big wood-fired melter.  We have not been able to get
> anything off the shelf that will cool the water, especially something that
> can be manually operated.  If I drop the water from a great height with no
> fan, won't the droplets create a downdraft and ruin the cooling effect?
>
> Advice sought.
>
> Thanks
> Crispin
>
>
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