Re: pigs (fwd)

• To: tesla-at-pupman-dot-com
• Subject: Re: pigs (fwd)
• From: Tesla List <mod1-at-pupman-dot-com>
• Date: Sat, 14 Feb 1998 10:43:27 -0700 (MST)
• Approved: mod1-at-pupman-dot-com

---------- Forwarded message ----------
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.

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