[특허]Compressed gas energy storage system

Compressed gas energy storage system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F03C-001/00 F01K-001/00 F02G-001/02 F01L-001/46 F04B-039/06 F01L-009/02
출원번호	US-0655380 (2012-10-18)
등록번호	US-9243585 (2016-01-26)
발명자 / 주소	Le Roux, Phillip Peterson, Nicholas
출원인 / 주소	LightSail Energy, Inc.
인용정보	피인용 횟수 : 0 인용 특허 : 44

초록 ▼

Embodiments relate generally to energy storage systems, and in particular to energy storage systems using compressed gas as an energy storage medium. In various embodiments, a compressed gas storage system may include a plurality of stages to convert energy into compressed gas for storage, and then to recover that stored energy by gas expansion. In certain embodiments, a stage may comprise a reversible compressor/expander having a reciprocating piston. Pump designs for introducing liquid for heat exchange with the gas, are described. Gas flow valves featuring shroud and/or curtain portions, are also described.

대표청구항 ▼

1. An apparatus comprising: a chamber defined within a plurality of liquid sprayers;a plunger piston having a first end moveable in response to gas expanding within the cylinder in an absence of combustion, the plunger piston having a second end in communication with a crank;a dedicated active high pressure valve comprising a poppet moveable relative to a port of the cylinder;a channel between the dedicated high pressure valve and the chamber to substantially balance a pressure during valve actuation; anda piston seal located on a chamber wall rather than on the plunger piston. 2. An apparatus as in claim 1 wherein the plurality of liquid sprayers are arranged in at least one liquid spray ring. 3. An apparatus as in claim 1 wherein the channel comprises a vent through the poppet, and the valve further comprises a curtain portion. 4. An apparatus as in claim 1 wherein the valve further comprises a shroud. 5. An apparatus as in claim 1 further comprising a passive high pressure valve in communication with the chamber. 6. An apparatus as in claim 1 further comprising a cam assembly configured to operate the dedicated high pressure valve via a physical connection to the crank. 7. An apparatus as in claim 6 wherein the physical connection comprises a planetary gear. 8. An apparatus as in claim 6 wherein the cam assembly comprises a first cam pair and a second cam pair. 9. An apparatus as in claim 1 further comprising a dedicated low pressure valve comprising a second poppet moveable relative to a second port of the cylinder. 10. An apparatus as in claim 9 wherein the dedicated low pressure valve is spring actuated. 11. An apparatus as in claim 1 further comprising a liquid pump in fluid communication with a liquid sprayer, the liquid pump comprising opposing plungers in communication with a rotating cam via a carrier cam follower. 12. An apparatus as in claim 1 wherein the plunger piston is in communication with the crank through a mechanical linkage. 13. An apparatus as in claim 12 wherein the mechanical linkage comprises a crosshead having a central portion connected to an eccentric in order to move relative to end portions of the crosshead. 14. An apparatus as in claim 1 wherein the plurality of liquid sprayers are supplied with liquid only when they are not covered by the plunger piston. 15. A method comprising: actively controlling a dedicated high pressure valve via a rotating cam assembly to flow compressed gas into a chamber from a high pressure side;allowing the compressed gas to expand against a plunger piston in an absence of combustion within the chamber in order to drive a mechanical linkage;causing a liquid pump to flow liquid into the chamber through a plurality of sprayers for heat exchange;generating electricity from movement of the mechanical linkage; anda piston seal located on a chamber wall rather than on the plunger piston. 16. A method as in claim 15 wherein the plurality of sprayers are arranged in at least one liquid spray ring. 17. A method as in claim 15 wherein actively controlling the dedicated high pressure valve comprises changing a position of a first cam pair and a second cam pair. 18. A method as in claim 17 wherein the position is changed utilizing a stepper motor. 19. A method as in claim 15 wherein the dedicated high pressure valve is controlled via desmodromic actuation. 20. A method as in claim 15 wherein the liquid pump comprises a carrier type cam follower with opening and closing cams, and opposed plungers. 21. A method as in claim 15 wherein a pressure across the dedicated high pressure valve is balanced by a channel between the dedicated high pressure valve and the chamber. 22. A method as in claim 21 wherein the dedicated high pressure valve comprises a poppet and a curtain portion, and the channel comprises a vent through the poppet. 23. A method as in claim 15 wherein the dedicated high pressure valve comprises a shroud. 24. A method as in claim 15 wherein the plurality of liquid sprayers are supplied with liquid only when they are not covered by the plunger piston.

이 특허에 인용된 특허 (44)

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