[archiver]

Posted by Joe Johnson at 1/26/2001 9:52 PM EST


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.


In Reply to: Re: would muffin fans make the difference?
Posted by Matt Leese on 1/26/2001 9:27 PM EST:



For years we have been using Freez-It from Chemtronics.

The intended purpose of the stuff is for "Anti-Static"
uses, but as a practical matter, it is more often used
as "Cool in can!"

The stuff is basically a residue free liquid that boils
at room temp and pressure. It comes out of the can as
a liquid but quickly evaporates.

As any Freshman Thermo student can tell you, the heat
to boil the liquid has to come from somewhere and in
our case, quite often it comes form wasted electrically
energy that has not gone to do useful stuff like spin
our wheels or lift our arms but rather has been
converted to thermal energy in the windings and
housings of our motors.

BOTTOM LINE: We thermal shock the beejeebers out of our
motors with no particular bad outcome as far as we have
been able to observe over 5 years.

I know that this is a controversial issue, but I call
'em how I see 'em.

Others will doubtless have differing opinions.

Joe J.