based small business make hydropower cheaper. PNNL is helping Percheron evaluate using composite instead of steel to make screw-shaped turbines called Archimedes Hydrodynamic Screw turbines ...

Named for its inventor, the Greek mathematician Archimedes (237-212 BCE), the Archimedes screw is a device for raising water. Essentially, it is a large screw, open at both ends and encased lengthwise ...

(Oh, and the entire estate runs on hydropower, courtesy of an Archimedes screw.) Sound intriguing? Take a look… Inside A Grade II Listed Georgian Mill That Was Once Kate Bush’s House Perched ...