What do a.m. and p.m. stand for?

pumped storage

a system for generating hydroelectric power for peak periods by pumping water from a lower to a higher reservoir during low-demand periods and then releasing it during peak periods. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for pumped storage
  • pumped storage is a tried and proven technology, with a high efficiency, and zero emissions.
  • Both the wind generation and pumped storage are renewable, zero emission generation sources.
  • Many hydro plants might also be pumped storage facilities at better efficiency than can be expected from compressed air storage.
  • pumped storage would work for them, as would reverse osmosis water production.
  • There are three types of hydropower facilities: impoundment, diversion, and pumped storage.
  • Prevent over pumping of upper reservoir at pumped storage projects.
British Dictionary definitions for pumped storage

pumped storage

(in hydroelectric systems) a method of using power at a period of low demand to pump water back up to a high storage reservoir so that it can be released to generate electricity at a period of peak demand
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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