| 摘要 |
Example energy storage systems ( 20, 20', 20 '') comprises a fluid circuit ( 22, 22', 22 '') and an electrical unit ( 24, 24', 24'' ) configured to operate as a motor in a first phase of operation and to operate as a generator in a second phase of operation. The fluid circuit ( 22, 22', 22 '') comprises a first fluid container ( 30, 30', 30 '') situated so content of the first fluid container experiences a first pressure level; a tank ( 32, 32', 32 '') having its content at a second pressure level (the second pressure level being less than the first pressure level): and, a first hydraulic motor/pump unit ( 34, 134, 34'' ) connected to communicate a first working fluid between the tank and the first fluid container. In the first phase of operation electricity is supplied to the first hydraulic/motor unit ( 34, 134, 34 '') whereby the first hydraulic/motor unit transmits the first working fluid from the tank into the first fluid container ( 30, 30', 30 ''). In the second phase of operation pressurized first working fluid in the first fluid container ( 30, 30', 30 '') is transmitted from the first fluid container through the first hydraulic/motor unit 34, 134, 34 '') to the tank ( 32, 32', 32 ''), thereby causing the electrical unit ( 24, 24', 24 '') to generate electricity.
|
