The picture you see above is the ThreeGorges Dam's massive turbines. It utilizes 32 generators, thirty 700MW units and two 50MW known as Francis turbines.
James B. Francis invented the design in 1848 and these turbines are reaction types, which means water loses is pressure and energy as its moves throught the turbine and drives the runner.
High pressure water enters through the spiral casing surrounding the guide vanes and the water flow towards the runner blades will spin at 75 revolutions per minute, driving a vertical shaft attached to an immense electromagnetic generator.
The main array of 700MW turbines each weigh approximately 6,000 tons and pass between 21,000–34,000 cubic feet of water every second. These turbines achieve an average efficiency—how much of the water's energy is converted into mechanical energy—of nearly 95 percent.
In the eight years, the dam has been even partially operational, it has produced over 500TWh of electricity.
As the year draws to a close, it’s time to reflect on some of the great tech we’ve seen in 2015. There have been some new developments and mind-blowing reveals. I’ve picked out a few things that I saw this year, and will definitely keep an eye on next year. Here’s my look at some exciting tech to watch out for in 2016: Read more
SpaceX has competition. Amazon founder Jeff Bezos has a company similar to SpaceX, called Blue Origin. The company just launched its New Shepard rocket into space and then, successfully landed it back on Earth. Read more