RE: principle of heat pipe? was Brazing of tungsten

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Michael.Day-at-USPTO.GOV>

John,

A typical heat pipe consists of a seal pipe containing a fluid, such as
water or freon.  Evaporation and condensation of the fluid is used to
improve the rate, efficiency, and distance of heat transfer.

-mike day

-----Original Message-----
From: tesla-at-pupman-dot-com [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, August 15, 2001 3:39 PM
To: tesla-at-pupman-dot-com
Subject: Re: principle of heat pipe? was Brazing of tungsten


Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<FutureT-at-aol-dot-com>

In a message dated 8/10/01 10:26:27 PM Eastern Daylight Time, 
tesla-at-pupman-dot-com writes:

> I have considered using an industrial "heat pipe" as a cooling element in
a
>  static gap, but have not played with it yet. A heat pipe will have
hundreds
>  of times better heat transfer ability compared to a solid copper rod of
>  equivalent size. At one time these were novel and quite expensive, but
are
>  now very commonly used in many industrial applications. I sometimes
>  comeacross them as surplus.
>  
>  Scott

Scott,

What is the principle of the heat pipe?  Is there a liquid metal
inside or something that helps transfer the heat?  Can these
heat pipes be easily home-made?

Thanks
John Freau