Cooling in vacuum chamber
Cooling in vacuum chamber
(OP)
I need to slightly cool an aluminum plate sitting in vacuum. I know I can attach copper tubing to the plate and flow chilled water through the tubing. I just wonder if there is a better - less bulky - way.
Plate size: 10" square (250 mm)
Heat input: 10W estimated (from a warmer object nearby)
Temperature to be maintained: 25 deg C
Thanks.
Plate size: 10" square (250 mm)
Heat input: 10W estimated (from a warmer object nearby)
Temperature to be maintained: 25 deg C
Thanks.





RE: Cooling in vacuum chamber
Can you simply place a radiation shield between your plate and the heat source?
RE: Cooling in vacuum chamber
RE: Cooling in vacuum chamber
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RE: Cooling in vacuum chamber
Can you put something through the wall of the vacuum chamber? Like a chunk of finned heat sink.
Ready-made cold plate? http://www.lytron.com/Cold-Plates
RE: Cooling in vacuum chamber
RE: Cooling in vacuum chamber
2) The subject aluminum plate needs to be lifted out. I cannot permanently attach copper tubing for cooling. The plate is not even and flat on the top.
3) I can place a prefabbed cooling plate (thanks for the link)inside the vacuum chamber and route chilled water to it. Is there a flexible heat conduction path that I can put between the rigid/fixed prefabbed cooling plate and the aluminum plate for 10W max, typically 5-6 W of heat? Copper chains? Gold necklaces? Anything that can be removed out of way so that I can lift the aluminum plate?
Thanks.
RE: Cooling in vacuum chamber
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RE: Cooling in vacuum chamber
Thanks.
RE: Cooling in vacuum chamber
So, front side should be mirror finished, preferrably gold to maximize reflection. All other sides should be black to be as emissive as possible.
Increasing thermal mass and radiation area, i.e., bulk plus radiating fins are enhancements.
Using a phase change material, ala http://www.saftpak.com/StpPack/ProductDetail.aspx?... would http://www.saftpak.com/StpPack/ProductDetail.aspx?... be another possibility. The idea is that the melting of the PCM absorbs lots of thermal energy, thereby fixing the plate temperature to the melting temperature of the PCM until it's completely melted. The PCD would be sealed within a blister on the back of the plate. The plate would be chilled with sufficiently cool water or refrigeration, and the plate could be used again.
A third, more complicated process would be to directly TE cool the plate. I'm envisioning a dovetail joint on the backside that mates to a dovetail surface with the TEC cold side attached thereon. The TEC hotside would be heat sunk into the base of the chamber.
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RE: Cooling in vacuum chamber
RE: Cooling in vacuum chamber
You gave me many options. I need about a day to think through. I will report back tomorrow. Thanks again.
RE: Cooling in vacuum chamber
You gave me many options. I need think over them. I will write back soon. Thanks again.
RE: Cooling in vacuum chamber
http://www.pcmenergy.com/products.htm
240W*hr/175J/gm = 4.9kg
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RE: Cooling in vacuum chamber
RE: Cooling in vacuum chamber
http://www.tetech.com/Peltier-Thermoelectric-Coole...
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