It has to do with the improved Heron fountain video on his thread. My first thought was to use this system with rain barrels and a little water wheel for a little power generation possibly(I'm kind of new to the power part...) You could use the system in a wide variety of settings( I have an undergroundgreenhouse design I am working on that would use 55 gal drums as thermal mass heated by a RMH, having the water flow would help circulate the warmth thru the area) especially if you can get at least a trickle charge to supplement a solar system. Here's a drawing, the bottom half is an idea I'm going to try in our pond this summer to aerate the water.
The second idea/question has to do with fresnal lenses. My idea is to use a fresnal lens to heat a solid or liquid thermal mass (RMH double function? Heating for aquaponics/Water Mass?) Mike Rohas has a bunch of videos of him playing with the lenses they are pretty impressive. If you could get it to work right for you I'm thinking you could power a steam generator(https://www.youtube.com/watch?v=dI-Zl7nEzA8 ) to again supplement a solar system (not sure if this would be that much of a benefit as the sun would have to be out in full force meaning your PV cells would be charging...) My main goal for this idea is the heat capture anything else is a bonus. I was even thinking of making a cob oven with a concrete removable plug for the top so you can blast the inside with the sun build the heat replace the lid and bake.
If anyones tried anything like this or knows the science of how/why this will/won't work please let me know!
This is the first time I saw the video you linked, but I do not think it would work. From the video, even though they say the improvement makes it perpetual I think it would eventually stop, because how does the air pressure in A get replaced. Do a small scale version like they did and see how long it runs.