文献类型： 会议论文

第一作者： Mr Stefan Geisse

作者： Mr Stefan Geisse ¹ ;

作者机构： 1.QinetiQ Ltd Building A7, Room 2008Cody Technology Park Ively Road, Farnborough GU14 0LX Hampshire United Kingdom Tel: +44 1252 397647 sageisse@QinetiQ.com

会议名称： Power-Gen Asia 2006; 20060905-07; Hong Kong (CN)

主办单位：

页码： 1-15

摘要： Efficient operation of I industrial power gas turbines requires turbine inlet t ndustrial temperature be emperature determined as accurately as possible. Control of firing temperatures is perhaps the most critical parameter in safe, efficient and profitable plant operation. Current technology does not reliably and direct directly measure combustor exit/turbine inlet temperatures, but relies on the determination of ly turbine inlet temperature via probes placed downstream of the turbine (TAT), usually referred to as exhaust gas thermocouple (EGT) probes. Thermodynamic algorithms are then applied to determine the expected temperature at the turbine inlet (TIT). Parametric analysis of an industrial gas turbine’s con control system demonstrates that TA trol TAT uncertainty has by far the biggest effect on the T accurate determinat determination of TIT. Ion EGT probes installed on engines may not be reading accurate gas temperatures, thus when this data is input into the control system, the problem is compounded by the thermodyn thermodynamic algorithms used to determine the TIT. Amic The combination of large uncertainty of the standard calibration data and the unknown error of the true gas temperature lead to a large uncertainty of the calculated TIT. Taking the calibration uncertainty of th the thermocouple alone e can provide a calculation uncertai uncertainty for TIT of over nine degrees. Nty Reducing the uncertainty by 50% can lead to a 45% increase in TIT confidence. Whilst this will certainly improve uncertainty in the determination of the TIT, it only addresses half the issue. By carrying out testing of current EGT probe designs, QinetiQ have demonstrated that deviation from the true gas temperature within a typical industrial gas turbine can be as much as 14 degrees. This is caused primarily by disadvantageous design design. Improved design . Together with improvements in the calibration data can significantly reduce uncertainty in T TAAT measurement and thus determination of the TIT T TIT..

分类号： [ "F416.61" , "F416.61"]