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Re: Water As Dielectric
From: Thornton, Russ #CSR2000 [SMTP:ThorntoR-at-rc.pafb.af.mil]
Sent: Wednesday, November 12, 1997 8:45 AM
To: 'Tesla discussion Group'
Subject: RE: Water As Dielectric
Hi All,
Here on the Eastern Range, where we have many high powered radars
operating with voltages as high as 139Kvolts, we use water for cooling
many components at these voltages. The equipment required to maintain a
respectable dielectric constant is pretty elaborate with very expensive
de-ionizing filters and high maintenance pumps. It is not something you
want to mess with unless you have to. Anything that is in contact with
the water will dissolve in even the smallest amounts thus producing
impurities that must be removed on a continuous basis, thus the pumping
system. We try to maintain between 2 to 3 Megohms as read on a Thornton
Ohmmeter.
This is not an easy task.
Russ Thornton
CSR 2040,
Building 989, Rm. A1-N20
Phone: (407) 494-6430
Email: thorntor-at-rc.pafb.af.mil
>----------
>From: Tesla List[SMTP:tesla-at-pupman-dot-com]
>Sent: Sunday, November 09, 1997 12:48 AM
>To: 'Tesla List'
>Subject: Re: Water As Dielectric
>
>
>From: Alfred A. Skrocki[SMTP:alfred.skrocki-at-cybernetworking-dot-com]
>Sent: Saturday, November 08, 1997 8:15 AM
>To: Tesla List
>Subject: Re: Water As Dielectric
>
>On Friday, November 07, 1997 6:07 PM Alfred C. Erpel
>[SMTP:aerpel-at-op-dot-net] wrote;
>
>> Is distilled water considered to be a viable dielectric material for a
>> plate capacitor? High voltage vs. low voltage? DC vs. RF? Since it's k=80+
>> it would seem to be a good choice. As a toolmaker, I would have no problem
>> making a sealed, watertight plexiglas cube, void of air, with evenly spaced
>> copper plates inside, and I would like to do this if someone doesn't tell
>>me
>> it is a dumb idea.
>> What is water's dielectic strength? I did a search on the internet for
>> this value and the only thing I kept finding was it's dielectric constant.
>
>Alfred, I think almost every one of us got a gleam in our eyes when we
>found out how high the dielectric constant of water was! BUT we all also
>become equally disappointed when we find out how extremly difficult it is
>to get water pure enough to be in any way considered non-conductive. I
>don't know what the dielectric strength of 'pure' water is, but I do know
>it dosen't take much voltage at all for water to become quite conductive.
>I have heard of many individuals whot tried to make water dielectric
>capacitors and none have ever succeded.
>
>