Re: water filled tubing primary?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "robert heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

davep: I have both water cooled transformers and capacitors. Water is used
to cool the insulating oil. but is not in the high voltage portion of the
devise. A small fountain pump will circulate all the oil you nead to move.
     Robert  H 

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Wed, 11 Sep 2002 17:15:46 -0600
> To: tesla-at-pupman-dot-com
> Subject: Re: water filled tubing primary?
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Wed, 11 Sep 2002 17:17:16 -0600
> 
> Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <davep-at-quik-dot-com>
> 
>>> Could you (in theory) use water filled (lets say, 1/4 inch)
>>> tubing for your primary?
> 
>> Sure.
>> However:
>> Why?
>> (if heating:
>> 1) Heating of primaries, at most practical
>> powers is not an issue.
>> 2) Simply filling the tubing with water
>> will not cool them: the water would need
>> to be piped OUT of the primary to an
>> external heat exchanger.  Doable, with
>> rubber/plastic plumbing, however there is
>> not (generally) a problem with heating.)
>> 
>> Actually, copper tubing won't even work too well.
> 
> It will work fine.  Turbulence will make it work
> Modestly Better.
> 
>> Remember, that tubulence needs to be present in air or liquid to
> 
>> increase efficiency of heat transfer.
> 
> Increase is modest.  Not uncommonly, hassles with
> difficulties in making fins, keeping fins 'clean',
> etc, outweigh the advantages.
> )Hint:
> I have done thermal design.
> Hint 2:
> Note that heatsinks, while finned, lack 'added roughness'
> on the surface: the gains are too small:
> (
> 
> best
> dwp
> 
> ...the net of a million lies...
> Vernor Vinge
> There are Many Web Sites which Say Many Things.
> -me
> 
> 
>