Fabulous photo! I love the textures, the contrast between square and circular shapes and the colors. I'm amazed by the splashes of color from the sky showing through the old window and over the one wall. Excellent shot.
I've concluded that the water turbine is in the connected building visible here: paulweber.deviantart.com/art/O… and this disk is connected to the electrical generator (removed). The strange cylinder is labeled as "sheave" (ie. pully) in the diagram.