An analysis of creep phenomena in the power boiler superheaters
Authors:
- Piotr Duda,
- Łukasz Felkowski,
- Andrzej Duda
Abstract
Higher temperatures of the power boiler superheater operation may lead to high strains caused by the creep phenomenon. This paper presents a determination of the maximum allowable operating temperature limited by the creep phenomenon for steam superheater SH3. The calculations are carried out first on the basis of applicable European standards. Then, calculations are performed based on conducted creep tests, a proposed creep model, and a finite element method (FEM) model. A detailed creep phenomenon analysis based on the conducted creep tests shows that stresses that determine the creep process are mainly caused by pressure. Normal stresses resulting from bending are mainly the effect of thermal expansion. These stresses undergo significant relaxation because of creep. The creep phenomenon analysis explains the equations of the European standards. The presented calculations enable estimation of a safe value of the operating temperature which is constant over time. The estimated time of safe operation does not take account of temperature spikes. For this reason, pressure elements working at high temperatures must be inspected regularly to assess their wear state.
- Record ID
- CUTc8c88bf21fb843d5a65c5841dd1780a1
- Publication categories
- ;
- Author
- Journal series
- Metals, ISSN , e-ISSN 2075-4701, Monthly
- Issue year
- 2018
- Vol
- 8
- No
- 11
- Pages
- [1-12]
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 11-12; Bibliografia (liczba pozycji) - 22; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 8, Iss. 11
- Keywords in English
- boiler, stress, creep, diagnostic system, numerical simulation
- DOI
- DOI:10.3390/met8110892 Opening in a new tab
- URL
- https://www.mdpi.com/2075-4701/8/11/892 Opening in a new tab
- Related project
- Opracowanie metod identyfikacji nieustalonych zjawisk cieplno-wytrzymałościowych. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Language
- eng (en) English
- License
- Score (nominal)
- 30
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTc8c88bf21fb843d5a65c5841dd1780a1/
- URN
urn:pkr-prod:CUTc8c88bf21fb843d5a65c5841dd1780a1
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.