IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0086066
(2002-02-27)
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발명자
/ 주소 |
- Wilding, Bruce M.
- Bingham, Dennis N.
- McKellar, Michael G.
- Turner, Terry D.
- Raterman, Kevin T.
- Palmer, Gary L.
- Klingler, Kerry M.
- Vranicar, John J.
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
30 인용 특허 :
16 |
초록
▼
An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling st
An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through a turbo expander creating work output. A compressor is driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portions with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream. Additional features and techniques may be integrated with the liquefaction process including a water clean-up cycle and a carbon dioxide (CO2) clean-up cycle.
대표청구항
▼
An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling st
An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through a turbo expander creating work output. A compressor is driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portions with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream. Additional features and techniques may be integrated with the liquefaction process including a water clean-up cycle and a carbon dioxide (CO2) clean-up cycle. 1. A heat exchange system for an indwelling heat exchange catheter, comprising: a heat exchange bath configured to receive a conduit carrying working fluid to and from the catheter; a heating/coolant fluid in the bath to exchange heat with the working fluid; a heat exchanger through which the heating/coolant fluid flows, the heat exchanger including a refrigerant and a variable speed DC compressor; and a heating/coolant fluid pump circulating the heating/coolant fluid between the heat exchanger and the heat exchange bath. 2. The system of claim 1, further comprising a heating/coolant fluid level detector communicating with the heating/coolant fluid. 3. The system of claim 1, further comprising a working fluid level detector communicating with the working fluid. 4. The system of claim 1, further comprising at least one controller receiving patient temperature input and target temperature input, the controller controlling a heating/coolant fluid temperature in response thereto. 5. The system of claim 4, further comprising a working fluid pump to circulate the working fluid through the catheter, the working fluid pump being selectively energized by the controller. 6. The system of claim 1, further comprising a lid on the bath spaced above a top of the heating/coolant fluid. 7. The system of claim 1, further comprising a display showing at least one graph of temperature. 8. The system of claim 7, wherein the display presents qualitative comments on cooling. 9. A heat exchange system for an indwelling heat exchange catheter, comprising: a working fluid circuit connected to the catheter to carry a working fluid to and from the catheter; a heating/cooling circuit thermally coupled to the working fluid circuit, the heating/cooling circuit including a heating/cooling fluid that exchanges heat with the working fluid; and a refrigerating circuit thermally coupled to the heating/cooling circuit, the refrigerating circuit including a refrigerant that exchanges heat with the heating/cooling fluid. 10. The system of claim 9, wherein the working fluid is saline. 11. The system of claim 9, wherein the heating/cooling fluid is water glycol. 12. The system of claim 9, wherein the refrigerant is R134a. 13. The system of claim 9, wherein the working fluid circuit comprises: an indwelling heat exchange catheter; a heat exchange bath thermally coupled to the catheter; a working fluid pump coupled to the heat exchange bath; a working fluid level detector having a working fluid reservoir disposed therein, the working fluid level detector being in fluid communication with the working fluid pump; and a working fluid source supplying working fluid to the working fluid reservoir. 14. The system of claim 13, wherein the heating/cooling fluid circuit comprises: the heat exchange bath, the heat exchange bath being at least partially filled with the heating/cooling fluid; a heating/cooling fluid level detector in fluid communication with the heat exchange bath; a heater thermally coupled to the heat exchange bath, the heater heating the heating/cooling fluid; and a heating/cooling fluid pump within the heat exchange apparatus. 15. The system of claim 14, wherein the refrigerating fluid circuit comprises: a compressor thermally coupled to the heat exchange bath, the compressor cooling the heating/cooling fluid within the heat exchange apparatus. 16. The system of claim 15, further comprising: a controller connected to at least one of: the working fluid pump, the working fluid level detector, the heat exchange apparatus, the heating/cooling fluid level detector, the heating/cooling fluid pump, and the compressor. 17. The system of claim 16, further comprising: a temperature monitor connected to the controller. 18. The system of claim 17, further comprising: at least one temperature probe connected to the temperature monitor, the temperature monitor being thermally coupled to a patient. 19. The system of claim
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