[Daniel Salião Ferreira] may or may not be a Game of Thrones fan, but he does have a fun demo of the Seebeck effect in the form of a flashlight powered by fire and ice. The basic idea is to use a thermocouple, but — in this case — he uses a Peltier effect cooler.
The Peltier and Seebeck effects are two sides of the same coin: the Peltier effect creates heating and cooling when current flows through a thermoelectric material. In contrast, the Seebeck effect generates a voltage when there is a temperature gradient. While thermocouples do produce voltage this way, they usually have much lower power output and are useless as heat pumps.
Thermoelectric heat pumps — Peltier devices — use semiconductors, which allow them to reach higher temperature differences when used as a heat pump, and also perform better than a conventional metal thermocouple in reverse operation.
Generating power from waste heat is nothing new. Is it harder to do this with thermocouples? Yes. Yes, it is.
All those $20 mini fridge seems to be selling very well
Because they dont know it will cost them more in electric bills.
But they do it where compressors full of propane can’t go. Yeah, they allow propane in little fridges now. Still better than DuPont’s evil.
Technology connection has nice video about why those pumps suck :)
https://youtube.com/watch?v=CnMRePtHMZY&feature=shared
I had to re-read the article. Apparently a thermocouple is not a Peltier, and all the solid state mini fridges I’ve ever seen use a pelter.
‘couples are made with wires. Petier devices are sort of thermocouples made with semiconductors. So yeah, they work OK-ish for the car fridges. But a iron thermocouple, not so much ;-)
they sell because they say ‘fridge’, not because they work
The waves of energy are complex in the sheet, it don’t matter how you drive it. The suspensions should be longer. I really enjoyed the Moody’s reference, Darth’s voice wouldn’t do. MEMS mics would be most up to date. Those solid state pickups have two sides neither are ground, a little epoxy would insulate it balanced out. Ground the sheet! I’d use tiny electret mics in the contact mode myself though, yeah two. Mono is so regressive, my surround sound didn’t register any space at all. There are mass drivers “my china cabinet makes beautiful sound”, TV ad for such decades ago. Search invisible speakers.
Huh???
Okay, I think this comment was meant for the previous article, otherwise I am totally lost.
Looks like some AI gibberish, or poorly translated Chinese.
Is this the HAD equivalent of a numbers station radio message?
If you search for a “Luminizer” lantern, these are Seebeck LED lanterns powered by a candle/oil-lamp flame and are available for ~US$20 or so. Good for classroom demonstrations (and late-night picnics).
insert candlepower joke here
https://www.christopherrandallnicholson.com/uploads/4/9/4/8/49486603/1993-10-10-dilbert-dogbert-man-parking-lot-car_orig.gif
Have a look at US Patent Application US 2023/0029346 A1