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Two thoughts
1. Paul haese is looking to do this exact same thing with a c9.25 in adelaide
2. Whilst something is slower to transfer the cold from the cold plate, it is slower to lose it as well. If 1 x peltier system has enough oomph to cool the back plate or in essence the whole tube assembly them that will mean the air inside will cool better.
If i start my peltier up and measure the temp it drops to, then it is -2 or less. Whack a cold plate ie a 180mm x 2mm alu disc, then it will drop to say 10 degrees below current ambient temp. As soon as i start up the circulating fans, this ends up being a 5 degree difference as i am effectively cooling the air, but warming the cold plate by circulating the air.
You have 4 bolt holes on the cold plate, which you can attach the cold plate to the back of the tube and also a smear of thermal paste (from dork smith or jaycar, just so you transfer as much cold to the back of the tube.
Circulating the air will still be essential in side the tube ie via cat cooler or some small fans located behind the mirror.
I am very intersted in the results. I have asked Celestron about this, but am yet to get a reply?
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