Influence of Additional Loss in the Rotor Surface on Rotor Temperature Field of 1100MW Half-speed Nuclear Power Turbine Generator.

2018 ◽  
Author(s):  
L. Hu ◽  
Y. Su ◽  
W. Li ◽  
Y. Li ◽  
P. Wang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Nuclear Power ◽  
Turbine Generator ◽  
Power Turbine ◽  
Rotor Surface ◽  
Additional Loss

Temperature Calculation on Phase Lead Connecting Structures of 1100MW Generator Stator Parallel Rings

2011 ◽  
Vol 383-390 ◽  
pp. 3040-3045
Author(s):  
Yan Fei Wei ◽  
Le Qi ◽  
Ting Shan Wang ◽  
Jian Ping Wang ◽  
Zhe Long Xian ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Operation Performance ◽  
Turbine Generator ◽  
Field Coupling ◽  
Temperature Calculation ◽  
Phase Lead ◽  
Power Turbine ◽  
Calculation Results ◽  
Calculation Software ◽  
Generator Stator

The temperature rise of generator components has a great impact on operation performance for large turbine generator. In this paper, applying the general FE calculation software-ANSYS, with a sequential electromagnetic-thermal field coupling calculation method, temperature calculation on phase lead connecting structures of 1100MW nuclear power turbine generator parallel rings is presented. The calculation results could offer a basic analysis to optimize the design of the generator.

Research on the Vibration Characteristic of Composite Rotor for Halfspeed Nuclear Power Turbine-Generator

2017 ◽  
Author(s):  
Xiu-jin Wang
Keyword(s):  
Natural Frequency ◽  
Nuclear Power ◽  
Geometric Model ◽  
Element Model ◽  
Vibration Characteristics ◽  
Turbine Generator ◽  
Element Analysis ◽  
Large Capacity ◽  
Critical Speeds ◽  
Power Turbine

Shafting is one of the key units of large steam turbine generator set, its dynamic characteristics directly affect the technical level and operation effect of the new type large capacity Turbine-generator unit. The forces acting on the disc and the shaft are complex in operation. A composite rotor has various dynamic characters for a large capacity nuclear power Turbine-generator comparing with general rotor for its different structure. Numerical simulation was carried out to a composite rotor for a large capacity nuclear power T-G set, so as to analyze the influence of different length to diameter ratio on the vibration characteristics of the low pressure rotor and to study the effect of Interference Amount Between disc and shaft by using the three-dimensional finite element analysis in order to meet the requirements of the good vibration characteristics of the rotor. Firstly, the geometric model of the rotor is set up, and then the element model of the shafting is built, finally natural frequency of the rotor is calculated by using the mechanical module. Vibration characters such as the natural frequency and corresponding mode were obtained by analysis of vibration for the disc and shaft. The effect of the interference fit on critical speeds of the rotors are analyzed preliminarily. The results show that critical speeds of T-G rotor vary sensitively with magnitude of interference. (CSPE).

3D loss and heat analysis at the end region of 4-poles 1150 MW nuclear power turbine generator

2014 ◽  
Vol 63 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Guang-Hou Zhou ◽  
Li Han ◽  
Zhen-Nan Fan ◽  
Yong Liao ◽  
Song Huang
Keyword(s):  
Electromagnetic Field ◽  
Nuclear Power ◽  
Heat Dissipation ◽  
Calculation Model ◽  
Turbine Generator ◽  
Transient Electromagnetic ◽  
Power Turbine ◽  
Calculation Results ◽  
Operation Stability ◽  
Steady Temperature Field

Abstract To study the principle of loss and heat at the end region of large 4-poles nuclear power turbine generator, 3D transient electromagnetic field and 3D steady temperature field finite element (FE) models of the end region are established respectively. Considering the factors such as rotor motion, core non-linearity and time-varying of electromagnetic field, the anisotropic heat conductivity and different heat dissipation conditions of stator end region, a 50 Hz, 1150 MW, 4-poles nuclear power turbine generator is investigated. The loss and heat at the generator end region are calculated respectively at no-load and rated-load, and the calculation results are compared with the test data. The result shows that the calculation model is accurate and the generator design is suitable. The method is valuable for the research of loss and heat at the end region of large 4-poles nuclear power turbine generator and the improvement of the generator’s operation stability. The method has been applied successfully for the design of the larger nuclear power turbine generators

Temperature Calculation on Phase Lead Connecting Structures of 1100MW Generator Stator Parallel Rings

2012 ◽  
Vol 433-440 ◽  
pp. 7131-7137
Author(s):  
Yan Fei Wei ◽  
Le Qi ◽  
Ting Shan Wang ◽  
Jian Ping Wang ◽  
Zhe Long Xian ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Operation Performance ◽  
Turbine Generator ◽  
Field Coupling ◽  
Temperature Calculation ◽  
Phase Lead ◽  
Power Turbine ◽  
Calculation Results ◽  
Calculation Software ◽  
Generator Stator

The temperature rise of generator components has a great impact on operation performance for large turbine generator. In this paper, applying the general FE calculation software-ANSYS, with a sequential electromagnetic-thermal field coupling calculation method, temperature calculation on phase lead connecting structures of 1100MW nuclear power turbine generator parallel rings is presented. The calculation results could offer a basic analysis to optimize the design of the generator.

Pickering B Nuclear Power Generating Station Condenser Performance Improvement

2003 ◽  
Author(s):  
Wayne Allen ◽  
David Anderson ◽  
Bert Mayer
Keyword(s):  
Dreissena Polymorpha ◽  
Nuclear Power ◽  
Cooling Water ◽  
Zebra Mussels ◽  
Condenser Tube ◽  
Turbine Generator ◽  
Cleaning System ◽  
Generation Capacity ◽  
Flow Through ◽  
Electric Generation

The Ontario Power Generation (OPG) Pickering B Facility consists of four 540 MW nuclear generating units. Each unit is furnished with a once-through Condenser Cooling Water (CCW) System that uses Lake Ontario water. Zebra mussels (Dreissena polymorpha) are infesting the condenser cooling water intakes at Pickering. The mature mussels and their shells become entrained in the CCW, are deposited in the condenser inlet water boxes, and become lodged in the condenser tube sheets and within the tubes. As a result, the flow through the condenser is reduced, and the existing Condenser Tube Cleaning System (CTCS) performance is degraded. This reduces the Turbine-Generator generating capability that results in a loss of electric generation revenues for OPG, and increased maintenance costs to manually remove the zebra mussels from the condenser. OPG decided to install Debris Filters in the six 72-inch diameter inlets of each of the four Pickering B units to automatically remove the zebra mussels before they enter the condensers and discharge them back into the lake. The Debris Filters for Unit 8 were installed during a scheduled outage in the winter of 2001/2002. The Unit 5 installation was completed at the end of 2002 and the Unit 6 & 7 installations are scheduled for 2003. The installed equipment is performing as expected. The zebra mussels are intercepted by the Debris Filter, and are automatically discharged into the condenser bypass and returned to the lake. The CTCS system can again perform its intended function to prevent bio-fouling buildup inside the condenser tubes. As a result, generation capacity increased and maintenance expenditures decreased with a net result of increased revenues for OPG.

scholarly journals Power Turbine Generator System

2015 ◽  
Vol 50 (3) ◽  
pp. 293-296
Author(s):  
Hidetaka Nakamura ◽  
Satoshi Tsujimura
Keyword(s):  
Turbine Generator ◽  
Generator System ◽  
Power Turbine

Multi-Pressure Surface Condenser Performance Evaluation: A Case Study

2004 ◽  
Author(s):  
Komandur S. Sunder Raj
Keyword(s):  
Power Plant ◽  
Nuclear Power ◽  
Performance Modeling ◽  
Plant Design ◽  
Turbine Generator ◽  
Modeling Tools ◽  
Pressure Surface ◽  
Design Basis ◽  
Predicting Performance

Surface condensers for power plant applications are generally specified and designed following turbine-condenser optimization studies. The turbine manufacturer provides turbine-generator performance data (thermal kit) at the very outset of plant design when the condenser is usually a black box and not much is known about its design. The turbine-generator guarantee would then be based on a specified condenser pressure that may or may not be attainable once the condenser is actually specified and designed. The condenser pressure used for the turbine performance guarantee might assume a single-pressure condenser while the actual design might be a multi-pressure condenser. In order to properly predict and monitor the performance and conduct diagnostics on a multi-pressure condenser, it is important to understand the design basis and develop an accurate model using performance modeling tools. The paper presents a multi-pressure condenser case study for a 600 Mwe nuclear power plant. The paper discusses the design basis used, interface between the turbine and condenser, use of a performance modeling tool for predicting performance, determining capacity losses attributable to the condenser and conducting diagnostics.

THE THERMAL MODE OF LARGE-SPAN EXCA VATIONS DURING THE CONSTRUCTION OF NUCLEAR POWER FACILITIES

2020 ◽  
Vol 2 (1) ◽  
pp. 289-301
Author(s):  
I.P. KARNACHEV ◽  
◽  
V.G. NIKOLAEV ◽  
V.V. BIRYUKOV ◽  
S.A. GUSAK ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Mathematical Models ◽  
Experimental Research ◽  
Nuclear Power ◽  
Power Plants ◽  
Phase Transfer ◽  
Thermal Mode ◽  
Large Span ◽  
Transfer Processes

The paper observes particular experimental research results on increase of stability of mining excavations in a permafrost area under low positive temperatures. The authors discuss the tasks on determining the temperature field parameters around the different-section excavations of underground small nuclear power plants at the construction stage. The mathematical models were designed for heat transfer processes in frozen rocks. The rocks were simulated as pore media filled with water with phase transfer under heating. This allowed creating virtual computing stands on which it became possible to work out the thermal modes of excavation driving.

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