Serving as a “host” utility to EPRI’s supplemental demonstration initiative, SDG&E installed a Greensmith DESS in a grid-connected configuration in June 2011 and has been conducting operating evaluations of the unit over the past 6 months. United States, Pennsylvania, Blythe Township  Advanced Underground CAES Project With Saline Porous Rock Formation Compressed air storage, in-ground 3,000(300 x 10) A 300 MW A-CAES demonstration plant will use an underground storage container (depleted gas reservoir) and turbine generators. United Kingdom, England, Bedfordshire, Leighton Buzzard  Ulla-Førre Hydroelectric 7,800,000 MW·h (7.8 Twh)(640 MW x 12187 hrs) Combined hydroelectric reservoir and pumped storage plant.
Lacking a 5/16″ bit, we drilled them to ¼», then filed the holes until the connectors fit. If you’re not enthusiastic about all of those bit changes, consider using a stepped drill bit, such as the Irwin Unibit. United States, California, Redding  Guodian Supply-Side Energy Storage Project Battery, lithium-ion 10(5 x 2) This project is State Power’s first supply-side energy storage project, incorporating 49.5 MW installed wind capacity and a 5 MW lithium-ion battery system. United States, Michigan, Detroit  Redding Electric Utilities — Peak Capacity, Demand Response, HVAC Replacement Program Thermal storage, ice 6(1 x 6) Ice storage system assists building cooling during daylight hours. The diamond drawing obscures what’s really happening in the circuit. If we rearrange and redraw the circuit, we recognize that it’s a pair of resistive voltage dividers.
United States, Texas, Austin  Palmiet Pumped Storage Scheme Pumped hydro storage 4,000(400 x 10) Water is stored in an upper and lower reservoir. Experimental Circuit Since portable digital instruments have mostly superseded traditional techniques like the Wheatstone bridge, lets explore a more practical application on the designer’s workbench. The existing cooling tower was re-used, to make ice at night; an ice-making chiller and 6,000 tn hours of energy storage were installed to the existing cooling plant.