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과도열응력해석을 이용한 배열회수보일러 고압드럼의 부식피로에 관한 안전성 평가

Evaluation of Safety of Corrosion Fatigue of High Pressure Drum for Heat Recovery Steam Generator Using Transient Thermal Stress Analysis

Journal of the Korean Society for Precision Engineering 2018;35(11):1099-1105.
Published online: November 1, 2018

1 계명대학교 기계자동차공학전공

1 Department of Mechanical & Automotive Engineering, Keimyung University

#E-mail: bylee@kmu.ac.kr, TEL: +82-53-580-5922
• Received: March 11, 2018   • Revised: June 4, 2018   • Accepted: June 21, 2018

Copyright © The Korean Society for Precision Engineering

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Citations

Citations to this article as recorded by  Crossref logo
  • Flow-accelerated corrosion in low-pressure evaporator of heat recovery steam generator: Experiments and fluid dynamics simulation
    Min Ji Song, Woo Cheol Kim, Dong-Jin Kim, Sung-Woo Kim, Soo Yeol Lee
    Case Studies in Thermal Engineering.2025; 72: 106263.     CrossRef
  • Stress Analysis and Evaluation of Steam Separator of Heat Recovery Steam Generator (HRSG)
    Boo-Youn Lee
    Journal of the Korean Society of Manufacturing Process Engineers.2018; 17(4): 23.     CrossRef
  • Fatigue Evaluation of Steam Separators of Heat Recovery Steam Generators According to the ASME Boiler and Pressure Vessel Code
    Boo-Youn Lee
    Journal of the Korean Society of Manufacturing Process Engineers.2018; 17(4): 150.     CrossRef

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Evaluation of Safety of Corrosion Fatigue of High Pressure Drum for Heat Recovery Steam Generator Using Transient Thermal Stress Analysis
J. Korean Soc. Precis. Eng.. 2018;35(11):1099-1105.   Published online November 1, 2018
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Evaluation of Safety of Corrosion Fatigue of High Pressure Drum for Heat Recovery Steam Generator Using Transient Thermal Stress Analysis
J. Korean Soc. Precis. Eng.. 2018;35(11):1099-1105.   Published online November 1, 2018
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Evaluation of Safety of Corrosion Fatigue of High Pressure Drum for Heat Recovery Steam Generator Using Transient Thermal Stress Analysis
Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image
Fig. 1 3D solid model of HP drum
Fig. 2 Finite element model of HP drum
Fig. 3 Tresca equivalent stress under operating pressure
Fig. 4 Five locations to check the stress limit
Fig. 5 Steam temperature during transient conditions
Fig. 6 Feedwater temperature during transient conditions
Fig. 7 Pressure during transient conditions
Fig. 8 Temperature at the end of cold start
Fig. 9 Temperature at the end of hot start
Fig. 10 Temperature at the end of warm start
Fig. 11 Temperature at the end of load change
Fig. 12 Time-history of temperature at riser nozzle
Fig. 13 Tresca equivalent stress at the end of cold start
Fig. 14 Tresca equivalent stress at the end of hot start
Fig. 15 Tresca equivalent stress at the end of warm start
Fig. 16 Tresca equivalent stress at the end of load change
Fig. 17 Time-history of Tresca equivalent stress at riser nozzle
Evaluation of Safety of Corrosion Fatigue of High Pressure Drum for Heat Recovery Steam Generator Using Transient Thermal Stress Analysis

Mechanical properties

Temp.
(°C)
Young’s modulus
(GPa)
Poisson’s
ratio
Thermal expansion
coefficient (10-6/ K)
20 211.78 0.3 11.304
100 206.25 0.3 12.602
150 202.79 0.3 13.413
200 199.34 0.3 14.223
250 195.88 0.3 15.034
300 192.42 0.3 15.845
350 188.97 0.3 16.656
400 185.51 0.3 17.467

Thermal properties

Temp.
(οC)
Thermal
conductivity
(W/mK)
Specific heat
capacity
(J/kgK)
Density
(kg/m3)
Thermal
diffusivity
(10-6m2/s)
20 40.07 460.86 7850 11.08
100 40.96 508.91 7828 10.28
150 41.51 542.28 7812 9.798
200 42.06 579.94 7796 9.304
250 42.62 623.29 7779 8.790
300 43.17 673.78 7761 8.256
350 43.73 732.82 7743 7.706
400 44.28 801.85 7723 7.150

Summary of Tresca equivalent stress under operating pressure

(unit: MPa)

Location (σeq,t)op
Downcomer nozzle 393.3
Riser nozzle 377.6
Feedwater nozzle 391.0
Steam outlet nozzle 286.4
Shell 337.5

Summary of Tresca equivalent stress under transient conditions

(unit: MPa)

Location Transient condition Max. Min.
Shell Cold start 368.1 0.0
Hot start 292.2 50.6
Warm start 386.2 0.0
Load change 158.3 99.6
Downcomer
nozzle
Cold start 439.7 0.0
Hot start 343.3 38.3
Warm start 463.0 0.0
Load change 147.2 57.6
Riser nozzle Cold start 441.9 0.0
Hot start 335.3 35.8
Warm start 448.4 0.0
Load change 103.3 49.2
Feedwater nozzle Cold start 470.8 0.0
Hot start 338.5 66.7
Warm start 480.3 0.0
Load change 195.6 68.4
Steam outlet
nozzle
Cold start 348.9 0.0
Hot start 236.6 36.6
Warm start 360.4 0.0
Load change 122.8 74.3

Results of evaluation of conservation of the magnetite protective layer

(unit: MPa)

Location (σeq,t)max (σeq,t)min (σeq,t)op+ 200 (σeq,t)op- 600
Shell 386.2 0.0 537.5 -262.5
Downcomer nozzle 463.0 0.0 593.3 -206.7
Riser nozzle 448.4 0.0 577.6 -222.4
Feedwater nozzle 480.3 0.0 591.0 -209.0
Steam outlet nozzle 360.4 0.0 486.4 -313.6
Table 1 Mechanical properties
Table 2 Thermal properties
Table 3 Summary of Tresca equivalent stress under operating pressure (unit: MPa)
Table 4 Summary of Tresca equivalent stress under transient conditions (unit: MPa)
Table 5 Results of evaluation of conservation of the magnetite protective layer (unit: MPa)