Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of used by for . A PSH system stores energy in the form of of water, pumped from a lower elevation to a higher elevation. Low-cost surplus off-peak electric power is typically used to run the pumps. During periods of high electrical demand, the stored water is released through The Department of Energy's "Pumped Storage Hydropower" video explains how pumped storage works. The first known use cases of PSH were found in Italy and Switzerland in the 1890s, and PSH was first used in the United States in 1930. Now, PSH facilities can be found all around the world! [pdf]
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A gyrobus is an electric bus that uses flywheel energy storage, not overhead wires like a trolleybus. The name comes from the Greek language term for flywheel, gyros. There are no gyrobuses currently in use commercially. .
The concept of a flywheel-powered was developed and brought to fruition during the 1940s by (of ), with the intention of creating an alternative to for quieter, lower-frequency routes, where full. .
The first full commercial service began in October 1953, linking the Swiss communities of and .. .
Media related to at Wikimedia Commons• - with a photograph showing two gyrobuses at a charging point .• - some of the information contained in. .
Since 2005, , Germany has had an Autotram, a vehicle that uses a fuel cell as its main source of energy and a small flywheel for regenerative braking only. [pdf]
[FAQS about Gyro energy storage motor]
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