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[DPRG] Fwd another thought

Subject: [DPRG] Fwd another thought
From: Alan Bredon alan7299 at yahoo.com
Date: Thu Oct 11 17:43:43 CDT 2001

That's why they use wax.
Alan


--- chrisbrenizer <chrisbrenizer at yahoo.com> wrote:
> 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
> > >
> > > _______________________________________________
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> >
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> 
> 
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