Systems and methods for energy storage and recovery using gas expansion and compression
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02G-001/04
F01K-021/04
F01K-021/02
F16D-031/02
출원번호
US-0154996
(2011-06-07)
등록번호
US-8448433
(2013-05-28)
발명자
/ 주소
McBride, Troy O.
Bollinger, Benjamin R.
Schaefer, Michael
Kepshire, Dax
출원인 / 주소
SustainX, Inc.
대리인 / 주소
Bingham McCutchen LLP
인용정보
피인용 횟수 :
11인용 특허 :
418
초록▼
In various embodiments, energy-storage systems are based upon an open-air arrangement in which pressurized gas is expanded in small batches from a high pressure of, e.g., several hundred atmospheres to atmospheric pressure. The systems may be sized and operated at a rate that allows for near isother
In various embodiments, energy-storage systems are based upon an open-air arrangement in which pressurized gas is expanded in small batches from a high pressure of, e.g., several hundred atmospheres to atmospheric pressure. The systems may be sized and operated at a rate that allows for near isothermal expansion and compression of the gas.
대표청구항▼
1. An energy storage and generation system comprising: a first pneumatic cylinder assembly for at least one of compressing gas to store energy or expanding gas to recover energy, the first pneumatic cylinder assembly comprising a first compartment, a second compartment, and a piston separating the c
1. An energy storage and generation system comprising: a first pneumatic cylinder assembly for at least one of compressing gas to store energy or expanding gas to recover energy, the first pneumatic cylinder assembly comprising a first compartment, a second compartment, and a piston separating the compartments;a motor/generator outside the first cylinder assembly;a transmission mechanism, coupled to the piston and to the motor/generator, for at least one of (i) converting reciprocal motion of the piston into rotary motion of the motor/generator, or (ii) converting rotary motion of the motor/generator into reciprocal motion of the piston;a heat-transfer subsystem for expediting heat transfer in at least one of the first and second compartments of the first pneumatic cylinder assembly;a control system for controlling operation of the first pneumatic cylinder assembly to enforce substantially isothermal expansion and compression of gas therein to thereby increase efficiency of the expansion and compression, the control system being responsive to at least one system parameter associated with operation of the first pneumatic cylinder assembly; andin selective fluid communication with at least one of the first compartment or the second compartment, a vent for at least one of supplying gas for compression or exhausting gas after expansion. 2. The system of claim 1, further comprising a shaft having a first end coupled to the piston and a second end coupled to the transmission mechanism. 3. The system of claim 2, wherein the second end of the shaft is coupled to the transmission mechanism by a crosshead linkage. 4. The system of claim 1, further comprising: a container for at least one of storage of compressed gas after compression or supply of compressed gas for expansion thereof; andan arrangement for selectively permitting fluid communication of the container with at least one compartment of the first pneumatic cylinder assembly. 5. The system of claim 1, further comprising a second pneumatic cylinder assembly comprising a first compartment, a second compartment, and a piston (i) separating the compartments and (ii) coupled to the transmission mechanism, wherein the second pneumatic cylinder assembly is fluidly coupled to the first pneumatic cylinder assembly. 6. The system of claim 5, wherein the first and second pneumatic cylinder assemblies are coupled in series. 7. The system of claim 5, wherein the second pneumatic cylinder assembly comprises a second shaft having a first end coupled to the piston of the second pneumatic cylinder assembly and a second end coupled to the transmission mechanism. 8. The system of claim 7, wherein the second end of the second shaft is coupled to the transmission mechanism by a crosshead linkage. 9. The system of claim 1, wherein the transmission mechanism comprises a crankshaft. 10. The system of claim 1, wherein the transmission mechanism comprises a crankshaft and a gear box. 11. The system of claim 1, wherein the transmission mechanism comprises a crankshaft and a continuously variable transmission. 12. The system of claim 1, wherein the heat-transfer subsystem comprises a fluid circulator for pumping a heat-transfer fluid into at least one of the first compartment or the second compartment of the first pneumatic cylinder assembly. 13. The system of claim 12, further comprising a mechanism for introducing the heat-transfer fluid disposed in at least one of the first compartment or the second compartment of the first pneumatic cylinder assembly. 14. The system of claim 13, wherein the mechanism for introducing the heat transfer-fluid comprises at least one of a spray head or a spray rod. 15. The system of claim 1, wherein the transmission mechanism varies torque for a given force exerted thereon. 16. The system of claim 1, further comprising power electronics for adjusting a load on the motor/generator. 17. The system of claim 1, wherein the at least one system parameter comprises at least one of a fluid state, a fluid flow, a temperature, or a pressure. 18. The system of claim 1, further comprising at least one sensor that monitors the at least one system parameter, wherein the control system is responsive to the at least one sensor. 19. The system of claim 5, wherein the control system operates the first pneumatic cylinder assembly and the second pneumatic cylinder assembly in a staged manner in which gas is at least one of compressed or expanded in (i) a first pressure range in the first pneumatic cylinder assembly and (ii) a second pressure range, higher than the first pressure range, in the second pneumatic cylinder assembly. 20. The system of claim 1, further comprising a valve disposed between the vent and the first pneumatic cylinder assembly, the control system operating the vent to supply gas for compression from the atmosphere to the first pneumatic cylinder assembly.
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