[특허]Method for determining steampath efficiency of a steam turbine section with internal leakage

General Electric Company

검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
검색연산자

검색도움말
검색연산자	기능	검색시 예
()	우선순위가 가장 높은 연산자	예1) (나노 (기계 \| machine))
공백	두 개의 검색어(식)을 모두 포함하고 있는 문서 검색	예1) (나노 기계) 예2) 나노 장영실
\|	두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색	예1) (줄기세포 \| 면역) 예2) 줄기세포 \| 장영실
!	NOT 이후에 있는 검색어가 포함된 문서는 제외	예1) (황금 !백금) 예2) !image
*	검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색	예) semi*
""	따옴표 내의 구문과 완전히 일치하는 문서만 검색	예) "Transform and Quantization"

과학기술 지식인프라 ScienceON

연합인증

연합인증 가입 기관의 연구자들은 소속기관의 인증정보(ID와 암호)를 이용해 다른 대학, 연구기관, 서비스 공급자의 다양한 온라인 자원과 연구 데이터를 이용할 수 있습니다.

이는 여행자가 자국에서 발행 받은 여권으로 세계 각국을 자유롭게 여행할 수 있는 것과 같습니다.

연합인증으로 이용이 가능한 서비스는 NTIS, DataON, Edison, Kafe, Webinar 등이 있습니다.

한번의 인증절차만으로 연합인증 가입 서비스에 추가 로그인 없이 이용이 가능합니다.

다만, 연합인증을 위해서는 최초 1회만 인증 절차가 필요합니다. (회원이 아닐 경우 회원 가입이 필요합니다.)

연합인증 절차는 다음과 같습니다.

최초이용시에는
ScienceON에 로그인 → 연합인증 서비스 접속 → 로그인 (본인 확인 또는 회원가입) → 서비스 이용

그 이후에는
ScienceON 로그인 → 연합인증 서비스 접속 → 서비스 이용

연합인증을 활용하시면 KISTI가 제공하는 다양한 서비스를 편리하게 이용하실 수 있습니다.

특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Method for determining steampath efficiency of a steam turbine section with internal leakage

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01M-015/14
미국특허분류(USC)	073/112.02; 073/112.03
출원번호	US-0104583 (2011-05-10)
등록번호	US-8342009 (2013-01-01)
발명자 / 주소	Murphy, Peter John
출원인 / 주소	General Electric Company
대리인 / 주소	Nixon & Vanderhye PC
인용정보	피인용 횟수 : 0 인용 특허 : 50

초록
▼

A method of more accurately measuring steam turbine efficiency is disclosed in which the sealing steam in the steam turbine is re-routed so that a more accurate measure of steam turbine efficiency can be made. Some of the steam entering a turbine goes into the turbine's end pack and then mixes with the steam that goes through the turbine. Piping is added from one of the end pack line's to the condenser. This added line has a valve, pressure, temperature and flow measuring devices. As the valve is opened, the amount of flow going to the end pack line allowing the end pack steam mix with the steam that goes through the turbine is reduced. As the flow in this line is reduced the measured temperature at the turbine exhaust will also decrease. The amount that the valve is opened is increased until either the exhaust temperature has reached a minimum, or the enthalpy in the pipe changes from the initial enthalpy.

대표
청구항
▼

1. A method of measuring the efficiency of a steam turbine in which steam from a high pressure end packing of the turbine is routed between the inner and outer shells of the turbine to provide sealing steam to a low pressure end packing of the turbine and then returned to a main steam flow after the last stage of the steam turbine before the pressure and temperature of the main steam flow is measured, the method comprising the step of temporarily re-routing the sealing steam to a steam condenser so that the efficiency of the steam turbine can be measured before the sealing steam is again returned to the main steam flow, the efficiency of the steam turbine being measured by dividing used energy by available energy. 2. The method of claim 1, wherein a high pressure end packing of the turbine includes a first line that routes a portion of the sealing steam to a point where the portion of sealing steam is mixed with the main steam that travels through the turbine and a second line running between the end packing and a steam condenser, and wherein the method further comprises the steps of adding between the second line and the condenser piping including a device to control the flow of sealing steam through the second line to the condenser, to thereby re-route a portion of sealing steam flowing through the first line to the second line and condenser so that the efficiency of the steam turbine can be measured before the sealing steam is returned to the main steam flow. 3. The method of claim 2, wherein the added piping includes a flow control valve, a pressure measuring device, temperature measuring device and a steam flow measuring device, and wherein the step of using the added piping to control the amount of sealing steam flowing through the second line, and thereby the amount of sealing steam re-routed from the first line includes opening the valve so that the amount of steam flowing through the first line is reduced so that the temperature measured at the turbine's exhaust will also decrease. 4. The method of claim 3, wherein the step of opening the valve so that the amount of steam flow through the first line is reduced is continued until either the turbine's exhaust temperature has reached a minimum temperature or the enthalpy in the added piping has changed from the initial enthalpy of the piping. 5. The method of claim 4, wherein the valve controls the amount of steam flow in the second pipe and the steam flow measuring device measures the amount of steam flow in the second pipe. 6. The method of claim 4, wherein the pressure measuring device and the temperature measuring device measure the change of enthalpy in the added piping. 7. The method of claim 4, wherein the valve is opened to an extent whereby the steam flow through the second line is large enough to cause the steam flow through the first line to reverse, such that the enthalpy in the second line is changed so as to be equal to the enthalpy of the main steam flow. 8. The method of claim 4, wherein the opening of the valve causes the high pressure end packing steam flow to be re-directed to the steam condenser. 9. The method of claim 1, wherein the efficiency of the steam turbine is measured by dividing used energy by available energy. 10. The method of claim 9, wherein used energy is defined as the enthalpy of the high pressure input steam minus the enthalpy of the main steam flow and available energy is defined as the enthalpy of the high pressure input steam minus isentropic exhaust enthalpy. 11. A method of more accurately measuring the efficiency of a steam turbine in which steam from a high pressure end packing of the turbine is routed between the inner and outer shells of the turbine to provide sealing steam to a low pressure end packing of the turbine and then returned to the main steam flow after the last stage of the steam turbine before the pressure and temperature of the main steam flow is measured, the turbine high pressure end packing including a first line that routes a portion of the sealing steam to a point where the portion of sealing steam is mixed with steam that travels through the turbine and a second line running between the end packing and a steam condenser, the method comprising the step of: using piping running between the second line and the condenser and including a flow control device to control the amount of sealing steam flowing through the second line, and thereby the amount of sealing steam flowing through the first line, to thereby re-route the sealing steam to the condenser so that the sealing steam is at least temporarily separated from the main steam flow,whereby, before the sealing steam is returned to the main steam flow, the efficiency of the steam turbine is measured by dividing used energy by available energy. 12. The method of claim 11, wherein the piping includes a valve, and wherein the step of using the piping to control the amount of sealing steam flowing through the second line, and thereby the amount of sealing steam flowing through the first line includes opening the valve so that the amount of steam flow going to the first line is reduced so that the temperature measured at the turbine's exhaust will also decrease. 13. The method of claim 12, wherein the step of opening the valve so that the amount of steam flow going to the first line is reduced is continued until either the turbine's exhaust temperature has reached a minimum temperature or the enthalpy in the added piping has changed from the initial enthalpy of the piping. 14. The method of claim 13, wherein the piping further includes a steam flow measuring device, which measures the amount of steam flow in the second pipe. 15. The method of claim 14, wherein the piping further includes a pressure measuring device and a temperature measuring device, which together measure the change of enthalpy in the piping. 16. A system for more accurately measuring the efficiency of a steam turbine in which steam from a high pressure end packing of the turbine is routed between the inner and outer shells of the turbine to provide sealing steam to a low pressure end packing of the turbine and then returned to the main steam flow after the last stage of the steam turbine before the pressure and temperature of the main steam flow is measured, the system comprising: a first line connected to the end packing that routes a portion of the sealing steam to a point where the portion of sealing steam is mixed with steam that travels through the turbine,a second line running between the end packing and a steam condenser, andpiping running between the second line and the condenser, which piping controls with a flow control device the amount of sealing steam flowing through the second line, and thereby the amount of sealing steam flowing through the first line, to thereby re-route the sealing steam to the condenser so that the sealing steam is at least temporarily separated from the main steam flow,whereby the efficiency of the steam turbine can be measured before the sealing steam again is returned to the main steam flow, andwhereby the amount of steam flow going to the first line is reduced and continued until either the turbine's exhaust temperature has reached a minimum temperature or the enthalpy in the added piping has changed from the initial enthalpy of the piping. 17. The system of claim 16, wherein before the sealing steam is returned to the main steam flow, the efficiency of the steam turbine is measured by dividing used energy by available energy. 18. The system of claim 16, wherein the piping includes a valve that is opened so that the amount of steam flow going to the first line is reduced, whereby the temperature measured at the turbine's exhaust will also decrease. 19. The system of claim 18, wherein the valve is open to a degree so that the amount of steam flow going to the first line is reduced and continued until either the turbine's exhaust temperature has reached a minimum temperature or the enthalpy in the added piping has changed from the initial enthalpy of the piping. 20. The system of claim 18, wherein the piping further includes a steam flow measuring device that measures the amount of steam flow in the second pipe. 21. The system of claim 18, wherein the piping further includes a pressure measuring device and a temperature measuring device that together measure the change of enthalpy in the piping.

이 특허에 인용된 특허 (50)

IPC 상위 출원인

내보내기

상세정보
내보내기 구분	파일저장 인쇄 메일전송
구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	> 총 건의 자료가 검색되었습니다. > 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) > 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. > 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) > 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오 > ~ > Text(ASCII format) Excel format

과학기술 지식인프라 ScienceON

ScienceON Chatbot

연합인증

특허 상세정보

Method for determining steampath efficiency of a steam turbine section with internal leakage

초록
▼

대표
청구항
▼

이 특허에 인용된 특허 (50)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

ScienceON Chatbot

연합인증

특허 상세정보

Method for determining steampath efficiency of a steam turbine section with internal leakage

초록 ▼

대표청구항 ▼

이 특허에 인용된 특허 (50)

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

초록
▼

대표
청구항
▼