The fans like this I've seen are powered by TEGs, just like the article is talking about. So, yes, but there is a trade-off. For those familiar with ICE engines, I'd compare it to the trade-off of a turbo/super charger.
They are a quite neat niche for TEGs: you have a ready supply of heat, lower power demands, and the fact that you need to get rid of the heat on the cold side is also what you're trying to achieve with the fan in the first place. I don't think they will generate too much excess power though.