[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Fw: Heat instead of solar power




----- Original Message -----
From: "Christopher E Phelps" <pce1@cybercrossings.com>
To: "Bob Bruninga" <bruninga@usna.edu>
Sent: Friday, March 08, 2002 3:22 PM
Subject: Re: [amsat-bb] Heat instead of solar power


> As far as I have found with experimenting with Peltier units, is that in
> appliying power to which terminal decides which side is hot or cold. I
have
> a couple of the Peltier coolers that Igloo makes for your vehicle.
Depending
> on which polarity you plug the cord into it, they will act as either a
> cooler or for like in the winter, they can keep food warm ( 40 degree F
> difference from outside and inside temp). I heard though, they are not
very
> efficient in generating electricty. I have never tried it though. I have
> some I had mounted on a large heatsink that I wanted to use in conjunction
> with my solar panels, but never got back to it.
>
> Chris
> ----- Original Message -----
> From: "Bob Bruninga" <bruninga@usna.edu>
> To: "William Leijenaar" <pe1rah@hotmail.com>
> Cc: <amsat-bb@AMSAT.Org>
> Sent: Friday, March 08, 2002 10:32 AM
> Subject: Re: [amsat-bb] Heat instead of solar power
>
>
> > On Fri, 8 Mar 2002, William Leijenaar wrote about Peltier junctions for
> > power:
> >
> > > Maybe this is some kind of idea to use instead of solar panels, or
maybe
> in
> > > combination with solar panels to convert the solar panel heat into
> > > electricity. The elements can also be painted black on the hot side
and
> > > white at the cold site, and then power an microsat(?)
> >
> > Yes, I have wanted to do the analysis for such an amateur satelltie just
> > as an interesting exepriment.  I got all ths stuff together and tried to
> > get one of the students interested in completing the engineering
analysis
> > as to the worth of such an approach, but never got one interested.  And
I
> > havent had time to piddle with it.  One reason we didnt get far with is
> > defining the hot and what is the cold side?  On anything we could build
we
> > wouldnt have attitude control and so could not predefine what each side
> > was which.
> >
> > SO we figured to just make half of all 6 sides of our cube be WHITE and
> > half be Black.  Then internallly thermally bind all the WHITE half-faces
> > with the black-half-faces and put the Peltier junctions between.  It
> > looked like a Rubix cube inside, but would be one way to get a one-way
> > heat flow on an unstabalized spacecraft..
> >
> > de WB4APR, Bob
> >
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
> >
>

----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home