DocumentCode
2117151
Title
Notice of Retraction
Research on Calculation Method of Governing Stage Off-design Conditions in Consideration of Governing Valve Overlap Degree
Author
Yong Li ; Li-kun Lu ; Sha Liu
Author_Institution
Sch. of Energy Resources & Mech. Eng., Northeast Dianli Univ., Jilin, China
fYear
2010
fDate
28-31 March 2010
Firstpage
1
Lastpage
4
Abstract
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
The calculation method of steam turbine´s stage off-design conditions is an effective means to realize the security and economical efficiency, but at present, research on the calculation method of governing stage off-design conditions in consideration of overlap degree seldom can be found in documents. In order to ensure the lift-flow characteristic curve of governing valve is a continuous smooth curve and approximation to a straight line in steam turbine with nozzle governing, there will be a certain degree of overlap among each governing valve on and off. There is not any consideration about the mentioned point on the calculation method of conventional governing stage off-design conditions, and the simplification leads directly to the calculation results of governing stage off-design conditions inconsistent with the actual running process. Therefore, it is very necessary to do some improvements on methods of calculation. The calculation method of governing stage off-design conditions in consideration of overlap degree is shown in this paper, and we verify its accuracy by the calculation example basing on 600MW steam turbine.
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
The calculation method of steam turbine´s stage off-design conditions is an effective means to realize the security and economical efficiency, but at present, research on the calculation method of governing stage off-design conditions in consideration of overlap degree seldom can be found in documents. In order to ensure the lift-flow characteristic curve of governing valve is a continuous smooth curve and approximation to a straight line in steam turbine with nozzle governing, there will be a certain degree of overlap among each governing valve on and off. There is not any consideration about the mentioned point on the calculation method of conventional governing stage off-design conditions, and the simplification leads directly to the calculation results of governing stage off-design conditions inconsistent with the actual running process. Therefore, it is very necessary to do some improvements on methods of calculation. The calculation method of governing stage off-design conditions in consideration of overlap degree is shown in this paper, and we verify its accuracy by the calculation example basing on 600MW steam turbine.
Keywords
steam turbines; valves; economical efficiency; lift-flow characteristic curve; power 600 MW; smooth curve; stage off-design conditions; steam turbines; valve overlap degree; Accuracy; Cities and towns; Energy resources; Environmental economics; Mechanical engineering; Power generation economics; Security; Turbines; Valves;
fLanguage
English
Publisher
ieee
Conference_Titel
Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific
Conference_Location
Chengdu
Print_ISBN
978-1-4244-4812-8
Type
conf
DOI
10.1109/APPEEC.2010.5449384
Filename
5449384
Link To Document