Energy storage and recovery

Details Energy storage and recovery Energy storage and recovery

F - Mech Eng,Light,Heat,Weapons

03

B

60/42

F03B 17/02 (2006.01) F03B 13/00 (2006.01)

Patent

CA 1250437

A B S T R A C T ENERGY STORAGE AND RECOVERY A method and system for underground storage and recovery of energy. A first fluid having a relatively high density is pumped from the bottom of a second cavern to the bottom of a first cavern filled with a fluid having a relatively low density by means of an overground pump/turbine apparatus, as a result of which the relatively low-density fluid is displaced out of the first cavern to the second cavern through an overground connection, filled with the second fluid. In order to retrieve the stored energy the low- density fluid is allowed to return to the first cavern displacing the high-density fluid to the second cavern, thus driving the pump/turbine.

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