Open AccessAnalysis of the Reasons for Insufficient Output of an Ultra-supercritical Unit
Author(s) -
Lu Jin,
Lin Guo Chen,
Wen Chen,
Zhuan Liu,
Bo Yan,
Zhong-hai Wan
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/295/4/042092
Subject(s) - supercritical fluid , steam turbine , unit (ring theory) , turbine , cylinder , steam pressure , environmental science , mechanical engineering , petroleum engineering , nuclear engineering , engineering , mathematics , thermodynamics , physics , mathematics education
An ultra-supercritical steam turbine unit is N660-25/600/600 type intermediate reheat, single-shaft, three-cylinder four-row steam and double-pressure condensing steam turbine manufactured by Dongfang Steam Turbine Co., Ltd. Through relevant certification, the nameplate capacity of the unit was expanded to 700MW. Since the winter of this year, the unit has had insufficient output. According to the historical data of the site, the reasons for the insufficient output of the unit were analyzed. The diagnosis conclusion is that the reduction of the flow area of the high-pressure cylinder is the main reason for the limited output of the unit.