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Written by Technology Connections on 2024-09-22 at 18:57

let's learn why Peltier devices are not actually very cool in this new video:

https://www.youtube.com/watch?v=CnMRePtHMZY

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Written by jenbanim on 2024-09-22 at 20:02

@TechConnectify I actually ran into these in one super niche use case where they were useful. At an astronomy observatory I was at for a bit they switched from cooling the CCDs with liquid nitrogen to using Peltier coolers. Even with the inefficiency, it was far cheaper than hauling liquid nitrogen tanks into the mountains, and didn't require nearly as much maintenance

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Written by Pianosaurus 🕴 on 2024-09-22 at 20:34

@jenbanim @TechConnectify Electronics engineer here. This is where they really shine, but it's not a use case you see much in household appliances: When you are cooling very small things, Peltier devices can keep things cold without having to move a lot of energy.

Typically, even for ICs, they are bad (but CCDs don't generate a lot of energy, luckily). I've been using them to cool down photon detectors (used with some very niche optical systems). Those detectors get very hot, but they are also micrometers across in size. At that scale, it doesn't take many watts of cooling power to cool it by over a hundred degrees C.

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Toot

Written by Cassandrich on 2024-10-09 at 00:47

@pianosaurus @jenbanim @TechConnectify Untested but suspected useful application: maintaining ultra low humidity in an enclosed environment using wicking action to move the condensation to hot side and evaporate it off outside enclosure using the heat.

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