BTW, I think I paid less than $400.00 for each of those coolers IIRC. Coleman
marketed them for a while but the price point could not compete with TED
systems that are less than half that. Good, fast cheap....you can only pick two.
Anthony.
I actually have a couple of portable coolers that use them. You can leave them
on freeze mode overnight in your car or truck using the battery and have plenty
of power to start the engine in the morning. That won't happen with a TED and
you won't be able to freeze things either although I do have a patent on one
design that does. The same Stirling engine core is used for cryo coolers and
they are quite reasonable in terms of cost. No surprise but as soon as you mod
or spec. the unit for cryo performance, it falls under export regulations.
The moving parts have no metal to metal contact. Everything floats on a helium
gas bearing. They run almost forever.
Best.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Norman Yarvin
Sent: Monday, August 03, 2015 5:39 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Peltier specifications
That was "more down-to-earth" relative to Anthony's statement that a few of
them are in orbit. (If Stirling cryocoolers were purely aerospace items made
in small quantities, they'd likely go for something like $100K; having them
mass produced to go in cell phone towers makes the price more reasonable,
although you still have to pay a lot more than $300 for a new one.)
In any case, the drawbacks of the $10 device have a lot to do with why one
might choose to spend more.
On Mon, Aug 03, 2015 at 03:23:55PM -0500, Edward Wright wrote:
Which has nothing to do with the statement I was responding to -- that
cryocoolers are "available at more down-to-earth prices." $300 is not
less than $10.
On Aug 3, 2015, at 2:49 PM, Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
In this case the original question was about "alternative methods to
chill (or heat) oxidizer", which would involve serious amounts of
heat, making efficiency important.
On Mon, Aug 03, 2015 at 01:17:06PM -0600, qbert@xxxxxxxxxxxxxxx wrote:
Actually they are used on several satellites, CanX-2, and others,
for there simplicity and small size. Yes they are inefficient and
can be a power hog but in the right circumstances they have a place.
Robert
At 12:32 PM 8/3/2015, you wrote:
Right, but as Anthony said, they're "a waste of perfectly good
energy". (The efficiency is atrocious.)
On Mon, Aug 03, 2015 at 01:04:36PM -0500, Edward Wright wrote:CPUs in some microcomputers.
Peltier coolers can be found for under $10. They're used to cool
http://benkrasnow.blogspot.com/2008/08/diy-liquid-nitrogen-generato
Sent from my iPad
On Aug 3, 2015, at 9:01 AM, Norman Yarvin <yarvin@xxxxxxxxxxxx> wrote:
On Mon, Aug 03, 2015 at 08:10:31AM -0400, Anthony Cesaroni wrote:
A waste of perfectly good energy. Google "stirling coolers" or
"stirling cryogenic coolers". About as efficient as you can get
in a small package with insane MTBF. There's a few of them in orbit.
They're also used in cell phone towers, so can be had at more
down-to-earth prices.
"Such RF filters with their integrated cryocoolers can be
found on eBay for under $300."
-- Ben Krasnow, at
r.html