| ▲ | actinium226 2 days ago | |
So, these devices.... turn heat into electricity? Where does the electricity go, back into the system it's powering? | ||
| ▲ | doctoboggan 2 days ago | parent [-] | |
> turn heat into electricity? No, they turn a temperature gradient into electricity. If one side is heated and the other cooled, you can get current flow on the two leads. And as with many electrical devices, it can also be run in reverse: if you put a voltage across the leads then one side will get hot and the other side will get cold. | ||