IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0757208
(2010-04-09)
|
등록번호 |
US-8176721
(2012-05-15)
|
발명자
/ 주소 |
- Kunkle, Kevin Lee
- Backman, Steven William
- Chrisfield, David John
- Smith, David William
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
A method of operating a fuel system is provided. The method includes removing fuel from at least a portion of the fuel system using a gravity drain process. The method also includes channeling nitrogen into at least a portion of the fuel system to facilitate removing air and residual fuel from at le
A method of operating a fuel system is provided. The method includes removing fuel from at least a portion of the fuel system using a gravity drain process. The method also includes channeling nitrogen into at least a portion of the fuel system to facilitate removing air and residual fuel from at least a portion of the fuel system, thereby mitigating a formation of carbonaceous precipitate particulates. The method further includes removing air and nitrogen from at least a portion of the fuel system during a fuel refilling process using a venting process such that at least a portion of the fuel system is substantially refilled with fuel and substantially evacuated of air and nitrogen. The method also includes removing air from at least a portion of the refilled fuel system using a venting process. The method further includes recirculating fuel within at least a portion of the fuel system, thereby removing heat from at least a portion of the fuel system and facilitating a transfer of operating fuel modes.
대표청구항
▼
1. A nitrogen purge sub-system for a liquid fuel system for a dual fuel combustion turbine, in flow communication with the liquid fuel system and a liquid fuel recirculation sub-system, the liquid fuel system having at least one cavity, said nitrogen purge sub-system comprising a source of nitrogen
1. A nitrogen purge sub-system for a liquid fuel system for a dual fuel combustion turbine, in flow communication with the liquid fuel system and a liquid fuel recirculation sub-system, the liquid fuel system having at least one cavity, said nitrogen purge sub-system comprising a source of nitrogen coupled to at least one pipe in flow communication with the cavity, and at least one three-way valve that controls flow of liquid fuel, nitrogen, and air between a respective liquid fuel source, the nitrogen source, and an air source to the cavity via said at least one pipe, wherein nitrogen flows from said source through said at least one pipe and into the cavity to facilitate removal of liquid fuel and air from the cavity such that a formation of a carbonaceous precipitate particulate is mitigated. 2. A nitrogen purge sub-system in accordance with claim 1 further comprising: at least one nitrogen purge pipe; anda nitrogen purge manifold wherein said manifold supplies nitrogen to at least one fuel pipe via said at least one nitrogen purge pipe. 3. A nitrogen purge sub-system in accordance with claim 2 wherein said at least one nitrogen purge pipe comprises at least one passage in flow communication with the liquid fuel recirculation sub-system such that removal of liquid fuel from at least a portion of the liquid fuel system is facilitated via transfer of fuel from at least a portion of the liquid fuel system to the cavity using a motive force induced via gravity. 4. A nitrogen purge sub-system in accordance with claim 2 wherein said at least one nitrogen purge pipe further comprises at least one passage in flow communication with the liquid fuel recirculation sub-system and said nitrogen source, such that removal of liquid fuel from at least a portion of the liquid fuel system is facilitated via inducing a motive force to bias fuel within at least a portion of the liquid fuel system towards the cavity, the cavity comprises a first pressure, said nitrogen source comprises a second pressure, said second pressure being greater than said first pressure, and furthermore, such that removal of air from at least a portion of the liquid fuel system is facilitated via inducing a motive force to bias air within at least a portion of the liquid fuel system towards the cavity, the cavity comprises a third pressure, wherein air within at least a portion of the liquid fuel system comprises a fourth pressure and said nitrogen source comprises a fifth pressure, said fifth pressure being greater than said fourth pressure, and said fourth pressure being greater than said third pressure. 5. A liquid fuel recirculation sub-system for a liquid fuel system for a dual fuel combustion turbine, in flow communication with the liquid fuel system and a nitrogen purge sub-system, the liquid fuel system having at least one cavity, a source of liquid fuel and a source of air, the liquid fuel source and air source both coupled in flow communication with said cavity, the nitrogen purge sub-system having a source of nitrogen coupled in flow communication with said cavity, said liquid fuel recirculation sub-system comprising at least one pipe in flow communication with said cavity and at least one valve that controls flow of liquid fuel, nitrogen and air between the liquid fuel source, nitrogen source and air source, respectively, to the cavity via said at least one pipe, said at least one valve having an open condition, wherein liquid fuel, nitrogen, and air flow from the liquid fuel source, nitrogen source and air source, respectively, through said at least one pipe and into the cavity to facilitate heat removal from at least a portion of the liquid fuel system and to facilitate removal of liquid fuel and air from the cavity such that a formation of a carbonaceous precipitate particulate is mitigated. 6. A liquid fuel recirculation sub-system in accordance with claim 5 wherein said at least one valve comprises at least one three-way valve, said three-way valve comprises at least one sensing line, at least one spring, at least one pilot air supply, at least one shuttle spool, and at least one flow port, such that said at least one sensing line, said at least one spring, said at least one pilot air supply, said at least one shuttle spool and said at least one flow port induce a bias, said bias being such that transport of liquid fuel, air and nitrogen within at least a portion of the liquid fuel system is facilitated. 7. A liquid fuel recirculation sub-system in accordance with claim 6 wherein said at least one three-way valve further comprises at least one passage in flow communication with said at least one pipe such that transport of liquid fuel, air and nitrogen within at least a portion of the liquid fuel system is facilitated. 8. A liquid fuel recirculation sub-system in accordance with claim 5 wherein said at least one pipe and at least one valve further comprises: at least one fuel recirculation pipe in flow communication with the liquid fuel system;at least one liquid fuel recirculation and vent shutoff valve in flow communication with said at least one fuel recirculation pipe;at least one vent standpipe in flow communication with at least one liquid fuel recirculation and vent shutoff valve; andat least one pressure relief valve in flow communication with the liquid fuel system. 9. A liquid fuel recirculation sub-system in accordance with claim 8 wherein said at least one fuel recirculation pipe comprises at least a portion of said liquid fuel recirculation sub-system being biased with an upward inclination with respect to a substantially horizontal plane such that air removal from at least a portion of the liquid fuel system and transporting air to said vent standpipe is facilitated. 10. A liquid fuel recirculation sub-system in accordance with claim 8 wherein said at least one pressure relief valve comprises a normally closed bias and an open bias to facilitate air removal from at least a portion of the liquid fuel system. 11. A liquid fuel recirculation sub-system in accordance with claim 10 wherein said at least one pressure relief valve further comprises a pressure control bias that facilitates control of liquid fuel system pressure in cooperation with said at least one valve and at least one pressure sensing apparatus to mitigate air infiltration into the liquid fuel system via the air source. 12. A liquid fuel recirculation sub-system in accordance with claim 8 wherein said at least one vent standpipe is in flow communication with said at least one fuel recirculation pipe, said at least one pressure relief valve, and at least one pressure sensing apparatus, such that removal of entrained air from a liquid fuel stream during a fuel recirculation mode of operation is facilitated and removal of air from the liquid fuel system during a liquid fuel fill mode of operation is facilitated. 13. A liquid fuel recirculation sub-system in accordance with claim 8 wherein said at least one liquid fuel recirculation and vent shutoff valve comprises an open bias to facilitate flow of liquid fuel, nitrogen and air to said at least one vent standpipe and a closed bias to substantially reduce flow of liquid fuel, nitrogen and air within at least a portion of the liquid fuel system.
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