| Electronics > Projects, Designs, and Technical Stuff |
| Building a Peltier module |
| << < (3/4) > >> |
| Rachie5272:
I can't find any small quantities. I guess it's not popular enough. I want to make some irregularly shaped coolers for a niche application. If I could find pellets, it would be a simple matter to solder them up on a custom PCB. I don't care about efficiency at the moment. |
| CM800:
Contact some of the Sellers on Alibaba and ask to buy a sample quantity, It's not hard and I doubt it will be too expensive. |
| Kleinstein:
The efficiency of metallic peltier elements is very limited. The bismuth telluride based ones reach a much higher efficiency - though still not very high. Something like 10% of the carnot efficiency is about as good as it gets. So it depends on the temperatures and what you look at, what efficiency you get. Conversion of heat flow to electricity might have a hard time to reach 5% efficiency as the maximum temperature is rather limited. The COP ( = heat moved divided by electricity used) can reach high numbers at low temperature difference, but will fast get smaller if a significant temperature difference is needed. So in a cooling application it is very important to get the heat away from the hot side. It takes 2 types of pellets with proper doping (N and P type). The contacts might also need some extra care, to make them solder-able. So the best guess is probably taking apart one of the cheap modules. I am not sure how well the elements will survive soldering. |
| NiHaoMike:
You can reverse engineer the connections in a cheap module, then use a glass cutter to cut it into smaller pieces. (You'll probably destroy at least a few modules trying to figure out how to do it.) |
| CM800:
Huh... well... seems I'm gonna be building a Peltier module, the company offered me free samples! How does one bond the Bismuth onto copper? D: |
| Navigation |
| Message Index |
| Next page |
| Previous page |