The Steam Pipe Network Mathematical Modeling and Flow Field Analysis of Zibo Power Plant

2014 ◽  
Vol 960-961 ◽  
pp. 1081-1085
Author(s):  
Dong Yang ◽  
Xiao Lu
Keyword(s):  
Power Plant ◽  
Velocity Vector ◽  
Field Analysis ◽  
Pipe Network ◽  
Before And After ◽  
Long Time ◽  
Flow Field Analysis ◽  
Steam Pipe ◽  
Main Steam ◽  
Steam Pipes

As Zibo power plant original steam pipes for a long time to run, the strength decreased and resistance was large, transformation was proposed to optimize. A mathematical model of the main steam pipe network was established to analysis changes of temperature, pressure and velocity vector before and after transformation. After transformation, the loss was significantly reduced,so transformation successfully achieve the optimization, adjustment and analysis functions of the main steam pipe network.

Synthetic Flow-Field Analysis of Main and Auxiliary Nozzles in Air-Jet Looms

2011 ◽  
Vol 411 ◽  
pp. 16-20 ◽  
Author(s):  
Shuan Jun Song ◽  
Dan Feng Shen
Keyword(s):  
Flow Field ◽  
Total Pressure ◽  
Field Model ◽  
Field Analysis ◽  
Comparison Analysis ◽  
Air Jet ◽  
Before And After ◽  
Flow Field Analysis ◽  
Air Jet Loom ◽  
First Time

The synthetic flow-field model of main and auxiliary nozzle flow-field in air-jet loom is introduced. The software of computational fluid dynamics FLUENT is used for the first time to simulate synthetic flow-field, and velocity vector is analyzed. To different spray angles of auxiliary nozzle, the velocity and total pressure of central air are compared in brief. The boundary conditions are changed by User Defined Functions (UDF) and the comparison analysis is done before and after using UDF.

Application of Ultrasonic Guided Wave Method for Flaw Detection in Coal-Fired Power Plants

2012 ◽  
Vol 476-478 ◽  
pp. 2590-2593
Author(s):  
Shi Tao Li ◽  
Hong Sheng Cai ◽  
Jing Yang
Keyword(s):  
Power Plants ◽  
Welded Joint ◽  
Flaw Detection ◽  
Circular Crack ◽  
Guided Wave ◽  
Wave Method ◽  
Ultrasonic Guided Wave ◽  
Steam Pipe ◽  
Main Steam ◽  
Steam Pipes

Ultrasonic guided wave method used for detection of cracks in the desuperheater header and main steam pipes of boiler in power plants has been reported. The dispersion curves of the guided wave for the main steam pipe were calculated and the wave modes used for the detection of notches were verified experimentally. One defect was found at the welded joint of the low temperature pipe on the furnace side. The time of flight diffraction (TOFD) was also carried out to verify the experimental results. The length, depth and height of the defect are 1200 mm, 18.9 mm and 5.5 mm, respectively. And one circular crack was found inside of the desuperheater header.

Residual life prediction of service exposed main steam pipe of boilers in a thermal power plant

2000 ◽  
Vol 7 (5) ◽  
pp. 359-376 ◽  
Author(s):  
A.K. Ray ◽  
Y.N. Tiwari ◽  
R.K. Sinha ◽  
S. Chaudhuri ◽  
R. Singh
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Life Prediction ◽  
Residual Life ◽  
Thermal Power ◽  
Steam Pipe ◽  
Residual Life Prediction ◽  
Main Steam

Effect of Creep Load on Oxidation Behavior of Main Steam Pipes

2015 ◽  
Author(s):  
Bo Yang ◽  
Yi-chang Huang ◽  
Xiao-ying Tang ◽  
Yu-hui Huang
Keyword(s):  
High Temperature ◽  
Growth Characteristic ◽  
P92 Steel ◽  
Applied Loading ◽  
Long Time ◽  
Temperature And Pressure ◽  
High Temperature Steam ◽  
Main Steam ◽  
Creep Loading ◽  
Steam Pipes

Main steam pipelines work in the environment of high temperature and pressure steam and withstand double damage between oxidation and creep load for a long time. Creep-oxidation interrupt tests were used in high temperature steam conditions at different stress load to get P92 steel mechanochemical behavior date in the present study. Weight gain method was used to get the oxidation kinetics under different applied loading. Scanning electron microscopy (SEM) micro observation techniques was applied to obtain growth characteristic in the interaction between steam oxidation and creep loading.

Application of Continuous Indentation Technique in Thermal Power Plant

2007 ◽  
Vol 26-28 ◽  
pp. 1149-1152
Author(s):  
Doo Song Gil ◽  
Yeon Shik Ahn ◽  
Sang Ki Park
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Indentation Technique ◽  
Stiffness Evaluation ◽  
Reheat Steam ◽  
Main Steam ◽  
Continuous Indentation ◽  
Steam Pipes ◽  
Service Inspection

Reliability evaluation of the welded structure is divided by method concentrating on defect and mechanical property. Thermal power plant facilities are operated in high temperature, high pressure and called for safety guarantee. Three factors are constituted for this. The First is PSI(pre-service inspection) and the second is ISI(in-service inspection) and the third is quantitative analysis in safety. Main steam and hot reheat steam pipes in thermal power plant are frequently making a trouble because of unsuitable quality control under construction. So, the suitable construction and the development of life forecast method is urgent matter. Therefore, the continuous indentation technique is interested in effective test method of pipes in power plant facilities. This strong point of the continuous indentation technique is possibility of super-precision measurement, programmed test analysis, nondestructive stiffness evaluation. This study is focused on the possibility of the continuous indentation technique application in main steam and hot reheat steam pipes for stiffness evaluation in thermal power plant facilities.

Carbon and Carbon-Moly Steam Pipe After Long-Time Service

1966 ◽  
Vol 88 (1) ◽  
pp. 14-20 ◽  
Author(s):  
J. J. Bodzin ◽  
J. W. Freeman ◽  
I. A. Rohrig
Keyword(s):  
Carbon Steel ◽  
Stress Rupture ◽  
Medium Carbon Steel ◽  
Time Service ◽  
Medium Carbon ◽  
Molybdenum Steel ◽  
Long Time ◽  
Steam Pipe ◽  
Main Steam ◽  
Steel Piping

Medium-carbon steel piping, after about 200,000 hr of service, and carbon–0.5 molybdenum steel piping, after about 150,000 hr of service, have been evaluated to determine the effect of prolonged service on the stress-rupture, creep, tensile, and impact properties of the materials. The carbon steel was in main steam service at 825 F, 600 psi, and the carbon–0.5 molybdenum steel at 900 F and 800 psi. All of the material tested would meet requirements for new piping; the original differences that probably were present in the piping as a result of fabrication or heat-treatment appeared modified as a result of service.

Design and Test of an Extensometer for Strain Monitoring of High Temperature Pipelines

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
X. Y. Hu ◽  
J. H. Jia ◽  
N. Wang ◽  
X. M. Xia ◽  
Z. D. Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Power Plant ◽  
Room Temperature ◽  
Design Procedure ◽  
High Accuracy ◽  
Deformation Monitoring ◽  
Strain Monitoring ◽  
Site Monitoring ◽  
Steam Pipe ◽  
Main Steam

In this paper, an extensometer was specifically designed for online deformation monitoring of high temperature pipes and its applicability was verified experimentally. The design procedure and the installation of the extensometer were described in detail. Experiments were carried out to prove the accuracy and the reliability of the extensometer. The laboratory test at room temperature was performed. The reliability of the extensometer at high temperature was validated by on-site monitoring of the deformation of a main steam pipe operating at 540 °C in a power plant. It was demonstrated that the designed extensometer has a high accuracy and an excellent reliability for measurement of the deformation of the high temperature pipes.

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