High-Temp Electronics For Venus Exploration, recent advances |
High-Temp Electronics For Venus Exploration, recent advances |
Mar 13 2013, 03:36 PM
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Member Group: Members Posts: 127 Joined: 20-April 05 Member No.: 291 |
(MOD NOTE: Started a new topic for this discussion to continue. Please remember the 'no sci-fi engineering' provision of rule 1.9. Have fun!)
Also, since I'm thinking about surface operations on Venus, the state-of-the-art in high temperature electronics has advanced quite far in the past decade. Its now possible to buy off the shelf chips from vendors designed to operate at the 250-300 C range. Meanwhile basic functionality has been tested at and beyond the temperatures needed for long-term surface operations on Venus: http://www.grc.nasa.gov/WWW/SiC/ http://www.gizmag.com/extreme-silicon-carb...ctronics/16410/ http://www.grc.nasa.gov/WWW/SiC/publicatio...Contact2010.pdf Another decade or so and a long-term Venus lander could be possible with (practically) off the shelf electronics! |
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Jun 25 2013, 08:48 PM
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
If the chamber where it is stored electrical instruments has a static insulation and the air is emptied, the internal temperature would be lower than outside? I think the heat sink in Venus is not useful because the atmosphere is warmer outside than the inside of chamber.
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Jun 26 2013, 03:45 PM
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#3
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Member Group: Members Posts: 127 Joined: 20-April 05 Member No.: 291 |
If you can get electronics running at ambient, just leave them exposed* and cool them off with a fan. After all - thats what we do with PCs here when they run hotter than the atmospheric temp
On a more realistic note, if memory serves, the latest surface proposals were nuclear powered and cooled with a Stirling Cycle heat engine. Of course those missions anticipated a 200 C interior and 500 C exterior - a 300 C differential. I imagine the power requirements for running the heat engines would be lower if you can get the electronics closer to 400 C and a 100 C - or smaller - differential, and more than make up for the hotter electronics. *Now we just need high temperature, acid rain resistant electronics |
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Jun 26 2013, 05:59 PM
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#4
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Member Group: Members Posts: 128 Joined: 10-December 06 From: Atlanta Member No.: 1472 |
QUOTE Now we just need high temperature, acid rain resistant electronics Not much of acid rain on the surface (sulfuric acid evaporates before reaching ground), but high preesure-hot CO2 is highly corrosive and problematic. It seems that the only thing "easy" for a venus lander is the actual EDL. Parachutes to around 20-30 km, then free fall all the way down. |
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