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pigs with fins




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From:  Bill Noble [SMTP:william_b_noble-at-email.msn-dot-com]
Sent:  Saturday, February 14, 1998 10:10 PM
To:  Tesla List
Subject:  Re: pigs with fins

larger oil filled transformers have serious radiators and several electric
fans to move air through them.  If you look at the mains transformers in
Saudi Arabia (where they are typically on a wall or sitting on a concrete
pad) you will see much larger heat radiators than you will see in most (if
not all) of this country.

>Date: Sat, 14 Feb 1998 08:56:47 -0800
>From: Jim Lux <jimlux-at-earthlink-dot-net>
>To: Tesla List <tesla-at-pupman-dot-com>
>Subject: Re: pigs (fwd)
>
>
>>
>> on larger pole pigs on the outer casing there are sometimes... fins?
>> sticking out around the outside they attatch at the top and separate
>> from the main casing then run down the length and re attatch at the
>> bottom. does anyone know what these are? cooling tubes that work by
>> convection perhaps. just a little curious.
>>
>
>Yep...cooling fins. The oil heats up in the middle part (i.e. the tank),
>rising to the top, flows out to the fin, where it cools, and falls
>re-entering the tank at the bottom. The technique is called thermosyphoning
>and works pretty well, in general.
>
>