I just stumbled across the concept of the [pulser pump] - a pump that uses water flow with a small head to pump part of the water to a higher head. Simiar to a ram pump, but without any moving parts.
This could be interesting as an alternative to small scale hydro, as an irrigation system and - since the pump also aerates the water - even for water treatment. At least, those are the claims that the inventor makes and I find them plausible.
On google scholar I found no articles about the pulser pump, but I may have missed something. I'd be interested in Articles that answer one or more of these questions:
- How can such a pump be modelled mathematically, how efficient is it?
- How effective is it at aerating water?
- Does the pump still work with slurries?