Up 'til now, these diary entries have all been about my Powerspout installation. Last month I visited an elegant scheme that is quite different, - instead of being low flow with several meters of head like mine, this one was high flow with just 2.7m of head.
I'll let the pictures tell the story:
The installation comprises two Powerspout Low Head Pro turbines generating into a single 2 kW Enasolar inverter which is grid connected. With both turbines running, the power into the grid is just over 1 kW; the operating voltage is 204v dc. Using the Powerspout calculator to 'back' calculate how much water is actually passing through the two turbines, I get it to be 82 l/s.
A lot of water is needed for these low head sites, but as can be seen, at the time of year I visited, at this site there was more than enough, - with much overspilling via the rectangular holes cut into the tank.
With regard to how noisy they were, there was so much sound from water splashing from the over flows that I couldn't hear the turbines themselves at all.
...a nice set up! My thanks to the owner, - with whose permission these pictures are posted.