311–320 of 329 posts
AI hi guys, pretty great AI article about this AI Peltier AI cooling AI tech. Really looking AI forward for another AI Samsung new AI devices. Best regards, AI Ps.: AI
This article uses the term AI 5 times to talk about basic microcontroller sensor readings.
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I haven't watched it recently, but here are the main takeaways I remember: Peltier coolers are neat because they're very small and quiet - as opposed to vapor compression systems solutions. However, they are an order of magnitude less energy efficient. Also Peltier coolers still have to obey the laws of thermodynamics, which means that to cool one side of the mechanism, you must heat the other side. In order to do an…
AFAIK, no one has tried to build a Peltier cell paired with a heat pump. I am not an expert, but I would imagine that it's a path that could bring higher efficiencies. Thoughts?
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Even above ambient, being able to reverse direction allows limiting any overshoot.
Yeah, it occurred to me after asking that that’s likely why - with resistive heating you’re bound to have a fiddly time getting a stable temperature.
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COP has to be compared at the same delta T. The COP of a loss less refrigerator is infinite at Delta T = 0 And you dont get to stack Peltiers to increase COP, only to increase delta T. Still, Peltiers are super cool and I have some ideas for their use od they get slightly better. Advances are super welcome.
The idea was just so astonishing that I ordered some from American Science and Surplus. I connected the leads to a battery and poof, one side got hot and the other got cold. Blew my mind. I didn't actually have a use for it. It was just neat that it actually worked. I understand the basic physics of it perfectly well. It's just one of those things where you expect basic physics to be overwhelmed by friction or someth…
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It's tolerance. I've bought several of the quietest fridges and they all bother me. Old fridges sound nicer but newer ones are actually quieter.
Is it the fridge noise in particular or all noises that you find you are sensitive to?
I remember back in 2006ish, my PC modding days, buying some peltier modules from eBay and (attempting) to get subzero temps out of my CPU cooling. If I recall correctly I got the setup powered but stopped short of actually putting it on my CPU when I couldn't mount it all in a way that would let me contain the condensation with what I had. Maybe it was pccooling or pccasemods dot com? There was a really strong commun…
Bit-tech.net was a good one
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They're already doing great. I have a portable neck AC unit that uses peltiers and it keeps my head and neck cool in otherwise nasty desert conditions when mining. Yes the radiative heating from the sun is still a bitch but a hat basically minimizes that, and also redirects the partially-chilled air more efficiently around my head and face. The direct-contact neck cooling plates are an absolute lifesaver. Keep the su…
Sounds cool :-) I think we'd forgive you for providing a direct link to this product.
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This video assumes that this technology will remain static over time. Peltier cooling could have a higher utility local maximum than currently used refrigerants.
Maybe. However there is fundamental physics in play and so it is likely someone (not me!) can tell you the most efficiency we get from that system. I'd be curious what those people say.
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Could you summarize the contents of this video so we don't have to watch it?
Heat pumps have a COP of 3-4, add in an evaporative cooling tower for a COP of 7. Peltier coolers will always have a COP of less than 1 (.1-.5?) Unless you want to spend more energy that you remove in heat, stick with heat pumps and cooling towers.
COP = Coefficient Of Performance, BTW. (Heat out) / (power in).