Browse > Article
http://dx.doi.org/10.3795/KSME-A.2012.36.5.563

Temperature Prediction Method for Superheater and Reheater Tubes of Fossil Power Plant Boiler During Operation  

Kim, Bum-Shin (KEPCO Research Insititute)
Song, Gee-Wook (KEPCO Research Insititute)
Yoo, Seong-Yeon (Mechanical Design Engineering Department, Chungnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.5, 2012 , pp. 563-569 More about this Journal
Abstract
The superheater and reheater tubes of a heavy-load fossil power plant boiler can be damaged by overheating, and therefore, the degree of overheating is assessed by measuring the oxide scale thickness inside the tube during outages. The tube temperature prediction from the oxide scale thickness measurement is necessarily accompanied by destructive tube sampling, and the result of tube temperature prediction cannot be expected to be accurate unless the selection of the overheated point is precise and the initial-operation tube temperature has been obtained. In contrast, if the tube temperature is to be predicted analytically, considerable effort (to carry out the analysis of combustion, radiation, convection heat transfer, and turbulence fluid dynamics of the gas outside the tube) is required. In addition, in the case of analytical tube temperature prediction, load changes, variations in the fuel composition, and operation mode changes are hardly considered, thus impeding the continuous monitoring of the tube temperature. This paper proposes a method for the short-term prediction of tube temperature; the method involves the use of boiler operation information and flow-network-analysis-based tube heat flux. This method can help in high-temperaturedamage monitoring when it is integrated with a practical tube-damage-assessment method such as the Larson-Miller Parameter.
Keywords
Fossil Power; Superheater; Reheater; Tube Temperature; Heat Flux; Flow Network; Oxide Scale;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Hong, S., 1995, "Prediction of Creep Rupture Time and Strain of Steam Pipe Accounting for Material Damage and Grain Boundary Sliding," Trans. of the KSME (A), Vol. 19, No. 5, pp. 1182-1189.
2 Hong, S. and Kim, J., 2000, "Numerical Analysis of Corrosion Effects on the Life on Boiler Tube," Trans. of the KSME(A), Vol. 24, No. 11, pp. 2812-2822.
3 Xu, L., Khan, J. A. and Chen, Z., 2000, "Thermal Load Deviation Model for Superheater and Reheater of a Utility Boiler," Applied Thermal Engineering 20, pp. 545-558.   DOI   ScienceOn
4 Viswanthan, R., 1993, "Life Assessment of Boiler Pressure Parts" EPRI, Vol. 7, Ch4.
5 Xu, M., Yuan, J., Ding, S. and Cao, H., 1998, "Simulation of the Gas Temperature Deviation in Large-Scale Tangential Coal Fired Utility Boilers," Computer Methods in Applied Mechanics and Engineering, pp. 369-380.
6 Seo, S., Park, H. and Lee, S., 2009, "Computational Studies on the Combustion and Thermal Performance of the Coal Fired Utility Boiler : Temperature and Thermal Energy Distribution," Journal of SAREK, Vol. 21, No. 3, pp. 157-166.
7 Tilley, R., 2006 "TULIP 2.0: A Computer Code for Probabilistic Analysis of Superheater/Reheater Tubing," EPRI, pp. 71-82.
8 Kim, B. and Yoo, S., 2010, "A Study on the Analysis of Incompressible and Looped Flow Network Using Topological Constitutive Matrix Equation," Journal of SAREK, Vol. 22, No. 8, pp. 573-578.
9 KOEWP, 2004, Dangjin Thermal Power Plant Technical Specification, pp. 73-99.
10 Dooley, R. B. and McNaughton, W. P., 2007, "Boiler and Heat Recovery Steam Generator Tube Failures:Theory and Practice," Vol. 3, pp. 44-1-44-35.
11 Hong, S., 1991, "The Creep Life Prediction Method by Cavity Area," Trans. of the KSME (A), Vol. 15, No. 5, pp. 1455-1461.