Electric Pumped Storage

摘要

A gallon of water weighs about eight pounds. By itself, it does not pack too much of a wallop. But combine it with thousands of gallons and it can become one of the most destructive forces on earth. Water is also a source of life. For thousands of years, humans have been using it for irrigation and to power watermills to grind grain, cut wood and other purposes. During the second half of the 19th century, the Age of Electricity was born when water began to turn generators to make electricity. This power was eventually distributed throughout the land.