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[DPRG] Fwd another thought

Subject: [DPRG] Fwd another thought
From: chrisbrenizer chrisbrenizer at yahoo.com
Date: Thu Oct 11 12:11:09 CDT 2001

would thermal shock also be a concern?

 i'd imagine, as the robot sat powered down, the components in contact with
the dry ice would cool to well below 0 degrees.  powering up and running
would be like leaving a TV or computer out in 40 below weather overnight
then rushing it in and plugging it in and turning it on.

cold silicon meeting hot current is like a cold glass dropped into hot
water.

at best you end up with a cracked glass, at worst a shattered one.


----- Original Message -----
>From: John R Caldwell <jcaldwel at jcpenney.com>
To: Eric Yundt <eric at facetcorp.com>
Cc: Dallas Personal Robotics Group <dprglist at dprg.org>
Sent: Wednesday, October 10, 2001 5:01 PM
Subject: Re: [DPRG] Fwd another thought


> After the dry ice is gone, his components will be very cold.  Does he need
to
> worry about water vapor condencing on his components?
>
> John Caldwell
>
>
> Eric Yundt wrote:
>
> > DPRG,
> >
> > The rest of the story is that, in a flash of inspiration brought
> > on by the Roboteer's frozen Diet Dr. Pepper pushing itself out of
> > an opened can, he's considering using dry ice chips in a tube to
> > try to dissipate the heat his 200 Amps are generating.  It is for
> > a Battlebot and he only needs it to last for 3 minute rounds.
> >
> > Gary Croll wrote:
> > >
> > > >
> > > > Wrapped in a towel, and stored in a fridge or freezer, dry ice
> > > > will last for several days.
> > > >
> > >
> > > My wife works in a medical office and they get medications shipped in
small
> > > styrofoam containers packed with dry ice. After a week or so in
transit,
> > > they still have 80-90% of the ice left.
> > >
> >
> > --
> > Eric
> >
> > _______________________________________________
> > DPRGlist mailing list
> > DPRGlist at dprg.org
> > http://nimon.ncc.com/mailman/listinfo/dprglist
>
> _______________________________________________
> DPRGlist mailing list
> DPRGlist at dprg.org
> http://nimon.ncc.com/mailman/listinfo/dprglist


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