Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02G-001/04
F16D-031/02
B66F-007/18
출원번호
US-0639703
(2009-12-16)
등록번호
US-8225606
(2012-07-24)
발명자
/ 주소
McBride, Troy O.
Bollinger, Benjamin R.
Izenson, Michael
Chen, Weibo
Magari, Patrick
Cameron, Benjamin
Cook, Robert
Richter, Horst
출원인 / 주소
SustainX, Inc.
대리인 / 주소
Bingham McCutchen LLP
인용정보
피인용 횟수 :
20인용 특허 :
423
초록▼
The invention relates to systems and methods for rapidly and isothermally expanding and compressing gas in energy storage and recovery systems that use open-air hydraulic-pneumatic cylinder assemblies, such as an accumulator and an intensifier in communication with a high-pressure gas storage reserv
The invention relates to systems and methods for rapidly and isothermally expanding and compressing gas in energy storage and recovery systems that use open-air hydraulic-pneumatic cylinder assemblies, such as an accumulator and an 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. The systems use heat transfer subsystems in communication with at least one of the cylinder assemblies or reservoir to thermally condition the gas being expanded or compressed.
대표청구항▼
1. A system for substantially isothermal expansion and compression of a gas, and that is suitable for the efficient use and conservation of energy resources, the system comprising: a cylinder assembly including a staged pneumatic side and a hydraulic side, the sides being separated by a movable mech
1. A system for substantially isothermal expansion and compression of a gas, and that is suitable for the efficient use and conservation of energy resources, the system comprising: a cylinder assembly including a staged pneumatic side and a hydraulic side, the sides being separated by a movable mechanical boundary mechanism that transfers energy therebetween, whereby energy is stored and recovered via compression and expansion of a gas within the cylinder assembly;a pressure vessel for storage of compressed gas selectively fluidly coupled to the cylinder assembly; anda heat transfer subsystem in fluid communication with the pneumatic side of the cylinder assembly to thermally condition the gas within the cylinder assembly, thereby increasing efficiency of the energy storage and recovery. 2. The system of claim 1, wherein the cylinder assembly comprises at least one of an accumulator or an intensifier. 3. The system of claim 1, wherein the heat transfer subsystem comprises: a fluid circulation apparatus; anda heat transfer fluid reservoir,wherein the fluid circulation apparatus is arranged to pump a heat transfer fluid from the reservoir into the pneumatic side of the cylinder assembly. 4. The system of claim 1, further comprising a spray mechanism disposed in the pressure vessel for introducing a heat transfer fluid therein. 5. The system of claim 4, wherein the spray mechanism comprises a spray rod. 6. The system of claim 1, further comprising: a plurality of control mechanisms associated with the cylinder assembly for controlling a flow of fluid therethrough; anda control system for actuating the control mechanisms, the control system (i) being responsive to at least one sensor that monitors a system parameter comprising at least one of a fluid state, a fluid flow, a temperature, a pressure, a position of the boundary mechanism, or a rate of movement of the boundary mechanism, and (ii) actuating at least one of the plurality of control mechanisms based on the monitored system parameter. 7. The system of claim 1, wherein, during operation, the heat transfer subsystem thermally conditions a gas being expanded or compressed in the cylinder assembly to maintain the gas at a substantially constant temperature. 8. The system of claim 1, further comprising, selectively fluidly coupled to the cylinder assembly, a vent for exhausting expanded gas to atmosphere. 9. A staged hydraulic-pneumatic energy conversion system that stores and recovers electrical energy using thermally conditioned compressed fluids, and that is suitable for the efficient use and conservation of energy resources, the system comprising first and second coupled cylinder assemblies, wherein: the system includes at least one pneumatic side comprising a plurality of stages and at least one hydraulic side, the at least one pneumatic side and the at least one hydraulic side being separated by at least one movable mechanical boundary mechanism that transfers energy therebetween, whereby energy is stored and recovered via compression and expansion of a gas within the at least one pneumatic side;the first cylinder assembly comprises an accumulator that transfers the mechanical energy at a first pressure ratio and the second cylinder assembly comprises an intensifier that transfers the mechanical energy at a second pressure ratio greater than the first pressure ratio; anda heat transfer subsystem in fluid communication with the at least one pneumatic side to thermally condition the gas within the at least one pneumatic side, thereby increasing efficiency of the energy storage and recovery. 10. The system of claim 9, wherein the first and second cylinder assemblies are fluidly coupled. 11. The system of claim 9, wherein the heat transfer subsystem further comprises: a fluid circulation apparatus; anda heat transfer fluid reservoir,wherein the fluid circulation apparatus is arranged to pump a heat transfer fluid from the reservoir into the at least one pneumatic side of the system. 12. The system of claim 11, wherein each of the cylinder assemblies has a pneumatic side, and further comprising a control valve arrangement for connecting selectively the pneumatic side of the first cylinder assembly and the pneumatic side of the second cylinder assembly to the fluid circulation apparatus. 13. The system of claim 9, wherein the heat transfer subsystem comprises a mechanism for introducing a heat transfer fluid in the at least one pneumatic side. 14. The system of claim 13, wherein the mechanism comprises at least one of a spray head or a spray rod. 15. A system for substantially isothermal expansion and compression of a gas, and that is suitable for the efficient use and conservation of energy resources, the system comprising: a cylinder assembly including a staged pneumatic side and a hydraulic side, the sides being separated by a movable mechanical boundary mechanism that transfers energy therebetween, whereby energy is stored and recovered via compression and expansion of a gas within the cylinder assembly; anda heat transfer subsystem in fluid communication with the pneumatic side of the cylinder assembly to thermally condition the gas within the cylinder assembly, thereby increasing efficiency of the energy storage and recovery,wherein the heat transfer subsystem comprises a mechanism for introducing a heat transfer fluid in the pneumatic side. 16. The system of claim 15, wherein the mechanism comprises at least one of a spray head or a spray rod. 17. The system of claim 15, wherein the mechanism comprises a fluid circulation apparatus arranged to pump a heat transfer fluid into the pneumatic side. 18. The system of claim 15, further comprising: a plurality of control mechanisms associated with the cylinder assembly for controlling a flow of fluid therethrough; anda control system for actuating the control mechanisms, the control system (i) being responsive to at least one sensor that monitors a system parameter comprising at least one of a fluid state, a fluid flow, a temperature, a pressure, a position of the boundary mechanism, or a rate of movement of the boundary mechanism, and (ii) actuating at least one of the plurality of control mechanisms based on the monitored system parameter. 19. The system of claim 15, wherein, during operation, the heat transfer subsystem thermally conditions a gas being expanded or compressed in the cylinder assembly to maintain the gas at a substantially constant temperature. 20. The system of claim 15, further comprising, selectively fluidly coupled to the cylinder assembly, a vent for exhausting expanded gas to atmosphere.
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