Systems and methods for energy storage and recovery using compressed gas
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-049/00
F15B-001/02
출원번호
UP-0421057
(2009-04-09)
등록번호
US-7832207
(2011-01-16)
발명자
/ 주소
McBride, Troy O.
Bollinger, Benjamin R.
출원인 / 주소
SustainX, Inc.
대리인 / 주소
Bingham McCutchen LLP
인용정보
피인용 횟수 :
89인용 특허 :
187
초록▼
The invention relates to methods and systems for the storage and recovery of energy using open-air hydraulic-pneumatic accumulator and intensifier arrangements that combine at least one accumulator and at least one intensifier in communication with a high-pressure gas storage reservoir on a gas-side
The invention relates to methods and systems for the storage and recovery of energy using open-air hydraulic-pneumatic accumulator and intensifier arrangements that combine at least one accumulator and at least one intensifier in communication with a high-pressure gas storage reservoir on a gas-side of the circuits and a combination fluid motor/pump, coupled to a combination electric generator/motor on the fluid side of the circuits.
대표청구항▼
What is claimed is: 1. A compressed gas-based energy storage and recovery system comprising a staged energy conversion system suitable for the efficient use and conservation of energy resources, the system comprising: a compressed gas storage system; a first cylinder assembly having a first chamber
What is claimed is: 1. A compressed gas-based energy storage and recovery system comprising a staged energy conversion system suitable for the efficient use and conservation of energy resources, the system comprising: a compressed gas storage system; a first cylinder assembly having a first chamber and a second chamber separated by a boundary mechanism, wherein at least one of the chambers is a pneumatic chamber, the first cylinder assembly being configured to transfer mechanical energy from the first chamber to the second chamber at a first pressure ratio; a second cylinder assembly having a first chamber and a second chamber separated by a boundary mechanism, wherein at least one of the chambers is a pneumatic chamber, the second cylinder assembly being configured to transfer mechanical energy from the first chamber to the second chamber at a second pressure ratio greater than the first pressure ratio; and a control system for operating the compressed gas storage system and the first and second cylinder assemblies in a staged manner to provide a predetermined pressure profile at, at least one outlet. 2. The compressed gas-based energy storage and recovery system of claim 1, further comprising a control valve arrangement, responsive to the control system, for interconnecting the compressed gas storage system, the first and second cylinder assemblies, and the at least one outlet. 3. The compressed gas-based energy storage and recovery system of claim 2, wherein the staged energy conversion system further comprises a hydraulic motor/pump having an input side in fluid communication with the at least one outlet and having an output side in fluid communication with at least one inlet in fluid communication with the control valve arrangement. 4. The compressed gas-based energy storage and recovery system of claim 3, wherein the staged energy conversion system further comprises an electric generator/motor mechanically coupled to the hydraulic motor/pump. 5. The compressed gas-based energy storage and recovery system of claim 3, wherein the control valve arrangement comprises: a first arrangement providing controllable fluid communication between the first chamber of the first cylinder assembly and the compressed gas storage system; a second arrangement providing controllable fluid communication between the first chamber of the first cylinder assembly and the first chamber of the second cylinder assembly; a third arrangement providing controllable fluid communication between the second chamber of the first cylinder assembly and the at least one outlet; and a fourth arrangement providing controllable fluid communication between the second chamber of the second cylinder assembly and the at least one outlet. 6. The compressed gas-based energy storage and recovery system of claim 5, wherein the control system opens and closes each of the control valve arrangements so that, when gas expands in the first chamber of the first cylinder assembly, the first chamber of the second cylinder assembly is vented by a gas vent to low pressure, whereby a fluid is driven from the second chamber of the first cylinder assembly by the expanding gas through the hydraulic motor/pump, and into the second chamber of the second cylinder assembly. 7. The compressed gas-based energy storage and recovery system of claim 5, wherein the control system opens and closes each of the control valve arrangements so that, when gas expands in the first chamber of the second cylinder assembly, whereby a fluid is driven from the second chamber of the second cylinder assembly by the expanding gas through the hydraulic motor/pump, and into the second chamber of the first cylinder assembly, and the first chamber of the first cylinder assembly is in fluid communication with the first chamber of the second cylinder assembly. 8. The compressed gas-based energy storage and recovery system of claim 2, wherein the control valve arrangement allows gas from the compressed gas storage system to expand first within the first chamber of the first cylinder assembly and then from the first chamber of the first cylinder assembly into the first chamber of the second cylinder assembly in a staged manner. 9. The compressed gas-based energy storage and recovery system of claim 1, wherein the staged energy conversion system further comprises a third cylinder assembly having a first chamber and a second chamber separated by a boundary mechanism, the third cylinder assembly being configured to transfer mechanical energy from the first chamber to the second chamber at a third pressure ratio greater than the second pressure ratio. 10. The compressed gas-based energy storage and recovery system of claim 1, wherein the staged energy conversion system further comprises a third cylinder assembly having a first chamber and a second chamber separated by a boundary mechanism, the third cylinder assembly being configured to transfer mechanical energy from the first chamber to the second chamber at the first pressure ratio, wherein the third cylinder assembly is connected in parallel with the first cylinder assembly. 11. The compressed gas-based energy storage and recovery system of claim 1, wherein the control system comprises a sensor system that monitors at least one of (a) a fluid state related to at least one of the first and second chambers of the first cylinder assembly and the first and second chambers of the second cylinder assembly, (b) a flow in hydraulic fluid, or (c) a position of at least one of the boundary mechanisms. 12. The compressed gas-based energy storage and recovery system of claim 1, wherein the control system operates the compressed gas-based energy storage and recovery system in at least one of an expansion cycle and a compression cycle, where the gas expansion and compression occurs substantially isothermally. 13. The compressed-gas based energy storage and recovery system of claim 12, wherein the system is configured to provide substantially isothermal gas expansion and compression via heat transfer between an environment outside the cylinder assemblies and a gas within the cylinder assemblies. 14. The compressed-gas based energy storage and recovery system of claim 1, wherein the first cylinder assembly is a pneumatic-hydraulic accumulator and the second cylinder assembly is a pneumatic-hydraulic intensifier. 15. A compressed gas-based energy storage and recovery system comprising a staged energy conversion system suitable for the efficient use and conservation of energy resources, the system comprising: a compressed gas storage system; at least three cylinder assemblies, each having a first chamber and a second chamber separated by a boundary mechanism that transfers mechanical energy therebetween, wherein at least one of the first and second chambers is a pneumatic chamber; and a control system for operating the compressed gas storage system and the at least three cylinder assemblies in a staged manner such that at least two of the cylinder assemblies are always in at least one of an expansion phase during an expansion cycle and a compression phase during a compression cycle. 16. The compressed-gas based energy storage and recovery system of claim 15, wherein the at least three cylinder assemblies include a plurality of intensifiers configured to transfer mechanical energy from their respective first chambers to their respective second chambers at different pressure ratios. 17. The compressed-gas based energy storage and recovery system of claim 15 further comprising: a first hydraulic motor/pump having an input side and an output side; and a second hydraulic motor/pump having an input side and an output side, wherein at least one of the hydraulic motors/pumps is always being driven by at least one of the at least two cylinder assemblies during the expansion cycle. 18. The compressed-gas based energy storage and recovery system of claim 17, wherein both hydraulic motors/pumps are driven by the at least two cylinder assemblies during the expansion cycle, each hydraulic motor/pump being driven at a different point during the expansion cycle, such that the overall power remains relatively constant. 19. The compressed gas-based energy storage and recovery system of claim 17, further comprising a control valve arrangement, responsive to the control system, for variably interconnecting the compressed gas storage system, the at least three cylinder assemblies, and the hydraulic motors/pumps. 20. The compressed gas-based energy storage and recovery system of claim 17 further comprising: a first electric generator/motor mechanically coupled to the first hydraulic motor/pump; and a second electric generator/motor mechanically coupled to the second hydraulic motor/pump, wherein each generator/motor is driven by its respective hydraulic motor/pump, thereby generating electricity during an expansion cycle.
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