[time-nuts] Thunderbolt cooling vs heating for stability

Pete Lancashire pete at petelancashire.com
Tue Jan 18 18:19:28 UTC 2011

I've done a couple projects/contracts with them, still have a few
dozen units, power supplies,
heat pipes etc.

but I've ditched the idea. Spare T'Bolt or two should exceed my life.


On Tue, Jan 18, 2011 at 10:12 AM, Chris Albertson
<albertson.chris at gmail.com> wrote:
> On Tue, Jan 18, 2011 at 9:16 AM, Pete Lancashire
> <pete at petelancashire.com> wrote:
>> Been getting ready to build a box for the t'bolt and instead of it all
>> getting hotter to maintain a stable temp
>> is the idea of cooling with a Peltier cooler, or a mix of a Peltier
> I've used Peltier cooling.  It works very well.  You epoxy the Peltier
> device to big chunk of aluminum with embed thermistors.  The
> controller servos the Peltier current to keep the thermistors at a
> setpoint.  You can get to better then 0.1C that way.
> Problems:  (1) This will use a "ton" of electric current.  (2) You
> will need a huge heat sink on the side of the Peltier not facing the
> device to be cooled.  So huge that you will likely need for it to be a
> water based system with a pump
> Good news is that Melcor sells everything you need, the peltiers, heat
> exchangers and so on.  And they have all the technical data you need
> and tutorials too.     Also the exact same Peltier setup will either
> heat or cool
> You will need a lot of very good insulation.  Specifically to prevent
> heat from flowing between  the two sides of the peltier.    We used
> vacuum because it is very effective but it is expensive and complex to
> maintain.  You would likely find spray in place foam to work and the
> stuff is cheap and easy to spary between the hot and cold side heat
> sinks
> OK, my point is, yes it will work but it will be far from cheap and easy
> --
> =====
> Chris Albertson
> Redondo Beach, California
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