Systems and Methods for Improving Drivetrain Efficiency for Compressed Gas Energy Storage and Recovery Systems
First Claim
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1. A compressed gas-based energy storage and recovery system utilizing substantially isothermal expansion and compression of a gas, the system comprising:
- at least one cylinder assembly including a first chamber and a second chamber separated by a movable mechanical boundary mechanism that transfers energy therebetween;
a hydraulic motor; and
a staging subsystem coupling the hydraulic motor to the at least one cylinder assembly, wherein the staging subsystem is configured to convert a pneumatic pressure range within the at least one cylinder assembly into a smaller hydraulic pressure range at the hydraulic motor.
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Abstract
The invention relates to power generation and energy storage and recovery. In particular, the invention relates to compressed gas energy storage and recovery systems using staged pneumatic conversion systems for providing narrow pressure ranges to a hydraulic motor.
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Citations
26 Claims
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1. A compressed gas-based energy storage and recovery system utilizing substantially isothermal expansion and compression of a gas, the system comprising:
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at least one cylinder assembly including a first chamber and a second chamber separated by a movable mechanical boundary mechanism that transfers energy therebetween; a hydraulic motor; and a staging subsystem coupling the hydraulic motor to the at least one cylinder assembly, wherein the staging subsystem is configured to convert a pneumatic pressure range within the at least one cylinder assembly into a smaller hydraulic pressure range at the hydraulic motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of providing a narrow pressure range to a hydraulic motor in a compressed gas-based energy storage and recovery system utilizing substantially isothermal expansion and compression of a gas, the method comprising the steps of:
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providing a compressed gas storage system; providing at least one cylinder assembly including a first chamber and a second chamber separated by a movable mechanical boundary mechanism that transfers energy therebetween; fluidly coupling the at least one cylinder assembly to the compressed gas storage system; providing a hydraulic motor; providing a staging subsystem to couple the hydraulic motor to the at least one cylinder assembly; and converting a pneumatic pressure range within the at least one cylinder assembly into a smaller hydraulic pressure range at the hydraulic motor. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification