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Lifetime evaluation of superheater tubes exposed to steam oxidation, high temperature corrosion and creep

Abstract

Advanced fossil fired plants operating at high steam temperatures require careful design of the superheaters. The German TRD design code normally used in Denmark is not precise enough for the design of superheaters with long lifetimes. The authors have developed a computer program to be used in the evaluation of superheater tube lifetime based on input related to tube dimensions, material, pressure, steam temperature, mass flux, heat flux and estimated corrosion rates. The program is described in the paper. As far as practically feasible, the model seems to give a true picture of the reality. For superheaters exposed to high heat fluxes or low internal heat transfer coefficients as is the case for superheaters located in fluidized bed environments or radiant environments, the program has been extremely useful for evaluation of surface temperature, oxide formation and lifetime. The total uncertainty of the method is mainly influenced by the uncertainty of the determination of the corrosion rate. More precise models describing the corrosion rate as a function of tube surface temperature, fuel parameters and boiler parameters need to be developed. (au) 21 refs.
Authors:
Henriksen, N; [1]  Hede Larsen, O; Blum, R [2] 
  1. Elsamprojekt A/S, Faelleskemikerne, Fredericia (Denmark)
  2. I/S Fynsvaerket, Faelleskemikerne, Odense (Denmark)
Publication Date:
Dec 01, 1996
Product Type:
Conference
Report Number:
NEI-DK-2465; CONF-9609282-
Reference Number:
SCA: 360105; 200202; PA: DK-96:001776; EDB-96:171273; SN: 96001697005
Resource Relation:
Conference: International conference on power plant chemical technology, Kolding (Denmark), 4-6 Sep 1996; Other Information: PBD: 1996; Related Information: Is Part Of Power plant chemical technology; PB: 357 p.
Subject:
36 MATERIALS SCIENCE; 20 FOSSIL-FUELED POWER PLANTS; SUPERHEATERS; SERVICE LIFE; CORROSION; TUBES; CREEP; OXIDATION; COMPUTERIZED SIMULATION; TEMPERATURE DEPENDENCE; PARAMETRIC ANALYSIS; FOSSIL-FUEL POWER PLANTS
OSTI ID:
399383
Research Organizations:
Faelleskemikerne (Denmark)
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE97714817; TRN: DK9601776
Availability:
OSTI as DE97714817
Submitting Site:
DK
Size:
pp. 6.1-6.23
Announcement Date:

Citation Formats

Henriksen, N, Hede Larsen, O, and Blum, R. Lifetime evaluation of superheater tubes exposed to steam oxidation, high temperature corrosion and creep. Denmark: N. p., 1996. Web.
Henriksen, N, Hede Larsen, O, & Blum, R. Lifetime evaluation of superheater tubes exposed to steam oxidation, high temperature corrosion and creep. Denmark.
Henriksen, N, Hede Larsen, O, and Blum, R. 1996. "Lifetime evaluation of superheater tubes exposed to steam oxidation, high temperature corrosion and creep." Denmark.
@misc{etde_399383,
title = {Lifetime evaluation of superheater tubes exposed to steam oxidation, high temperature corrosion and creep}
author = {Henriksen, N, Hede Larsen, O, and Blum, R}
abstractNote = {Advanced fossil fired plants operating at high steam temperatures require careful design of the superheaters. The German TRD design code normally used in Denmark is not precise enough for the design of superheaters with long lifetimes. The authors have developed a computer program to be used in the evaluation of superheater tube lifetime based on input related to tube dimensions, material, pressure, steam temperature, mass flux, heat flux and estimated corrosion rates. The program is described in the paper. As far as practically feasible, the model seems to give a true picture of the reality. For superheaters exposed to high heat fluxes or low internal heat transfer coefficients as is the case for superheaters located in fluidized bed environments or radiant environments, the program has been extremely useful for evaluation of surface temperature, oxide formation and lifetime. The total uncertainty of the method is mainly influenced by the uncertainty of the determination of the corrosion rate. More precise models describing the corrosion rate as a function of tube surface temperature, fuel parameters and boiler parameters need to be developed. (au) 21 refs.}
place = {Denmark}
year = {1996}
month = {Dec}
}