Dissertation > Excellent graduate degree dissertation topics show

Thermal Stress Forecast Analysis and Study of Ultra-Supercritical Steam Turbine Rotor

Author: QiZuo
Tutor: TianZuoHua；BaoJinHua
School: Shanghai Jiaotong University
Course: Control Engineering
Keywords: steam turbine high pressure rotor volume average temperature algorithm thermal stress COMSOL Multiphysics
CLC: TK261
Type: Master's thesis
Year: 2011
Downloads: 177
Quote: 0
Read: Download Dissertation

Abstract


Turbine rotor is one of important turbine components and high pressure rotor is more important in particular. When turbine is being started, stopped or on load, the metal temperature of cylinder casing and rotor become unsteady and the result is that a larger temperature gradient will be generated because of changing parameters of surface steam. The key to restrict starting/stopped rate is the thermal stress of turbine rotor, as well as to safe running. One of hot topics in power system field is enhancing abilities to safe and economical running. In order to achieve the goals, it is necessary that thermal stress is to be analyzed and calculated so as to realizing optimality of turbine starting and stop. This thesis study the analysis and control of the distribution of temperature and thermal stress in deeply on 1000MW ultra-supercritical steam turbine startup.Firstly this thesis establishes a two-dimensional symmetrical geometrical model and boundary condition of high pressure turbine rotor with COMSOL Multiphysics, analyzes the model in simulation and compares the data with the measured ones in power plants. The results show that it is probable to underestimate actual thermal stress of high pressure rotor with volume average temperature algorithm (thermal stress calculation algorithm) which is used commonly in turbine control.The model can be expressed as parametric one,as to be connected to Matlab conviently ,which can design high pressure rotor structure and aspects optimal,as well as startup/stop strategies.Then this thesis establishes a Matlab/Simulink simulation model used for calculating volume average temperature of high pressure rotor in real time, based on comprehensive comparison to the existing data which is from real time computing algorithm of high pressure rotor volume average temperature. A series of emulational calculation on high pressure rotor volume average temperature has been completed, which is sampled at cold starting, hot starting and on load respectively. Comparing with the field measured data, the calculation results are as good as the field ones.Lastly this thesis analyzes Siemens thermal stress control strategies in deep, based on detailed description of thermal stress real time online monitor of Siemens turbine. It is advantaged to develop thermal stress strategies and turbine life management system which have independent intellectual property rights.

Related Dissertations

  1. Development of Turbine Rotor Dynamic Balance System,TH877
  2. Rock-fill Concrete Experiments on Comprehensive Properties and Studies on Thermal Stress,TU528
  3. Ceramic Theramal Sterss Cleaving Technology Based on Laser,TQ174.62
  4. Research and application of blast furnace gas -fired steam turbine blowers,TF321.8
  5. Evaluation of the Temperature Field during Friction Stir Welding and Characterization of Weld for 2017 Aluminum Alloy,TG453.9
  6. The Experimental and CFD Research of the Extraction System in Steam Turbines,TM621
  7. QFSN600MW grade water - hydrogen turbine ventilation cooling system,TM311
  8. Thermal Analysis of Friction Pair of Wet Multi-disc Clutch,TH133.4
  9. Modeling the Effects of Grain Orientation of Cordierite Based Glass-Ceramics on Stress Distribution by Fem,TQ174.1
  10. The Method of the S109FA Unit’s Operation about Deeply Unloading in the Abnormal Working Conditions－Studying the Actual Production Application in the Deeply Unloading Technology,TM621
  11. The DEH’s Transformation and Optimizing of the Gas Turbine-steam Turbine Combine Cycle,TM621
  12. Adaptive Control for Once-through Boiler Turbine Coordinated System,TM621.6
  13. Research on Power System Low Frequency Oscillation Induced by Turbo-Power Changing,TM712
  14. Thermal Economic Performance Analysis and System Optimization of 600MW Power Unit,TM621.4
  15. Quantitative Study of Steam Turbine Unit’ Variable Load Optimal Operation,TM621
  16. Analysis of the Frictional Heating of Wheel-Rail Based on ANSYS,TH117.1
  17. Development of Rapid Design System for Turbine Generator Sets’ Rotor Coil,TM311
  18. Metal composite material surface Goos - H?nchen effect,O482.3
  19. The Life Evaluation on the High Pressure Rotor of the No 1# Steam Turbine of an Nuclear Power Station and the Interaction between a Screw Dislocation and a Plastic Zone of Arbitrary Shape,TM623
  20. Study on Modeling and Simulation for Fast Cut Back Test for 300MW Power Plant Units,TM621
  21. Optimized Structural Design and Basic Manufactural Study of Ceramic Extrusion Die,TG76

CLC: > Industrial Technology > Energy and Power Engineering > Steam Power Engineering > Steam turbine (steam turbine,steam turbine ) > Theory
© 2012 www.DissertationTopic.Net  Mobile