Monitoring of transient thermal stresses in pressure components of steam boilers using an innovative technique for measuring the fluid temperature
Authors:
- Magdalena Jaremkiewicz,
- Piotr Dzierwa,
- Dawid Taler,
- Jan Taler
Abstract
High thermal loads of the thick-walled components arise during the start-up and shutdown in the thermal power units, both classical and nuclear. The thermal stresses should be determined on-line during start-up of the power unit, to avoid reducing the lifetime of the so-called critical pressure components. It is necessary to know the time variations in fluid temperature, and heat transfer coefficient on the internal surface of the pressure components to determine the transient distribution of temperature and thermal stresses in the critical components of boilers. The thermal stress can only be calculated correctly if the temperature of the flowing fluid is accurately measured. Unfortunately, massive industrial thermometers used in power units are not able to measure the transient temperature of the fluid with sufficient accuracy due to their high thermal inertia. The goal of the paper is to present the use of the new measurement technique to determine the unsteady temperature of the superheated steam. The temperature of superheated steam was measured after the second stage of superheater using the proposed measuring technique and conventional industrial thermometers that are used today. The tests carried out showed very clearly the advantage of the proposed method over conventional thermometers.
- Record ID
- CUT436aae0d2bcf47e7997c364b5b3e6c5c
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2019
- Vol
- 175
- Pages
- 139-150
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 149-150; Bibliografia (liczba pozycji) - 24; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 175
- Keywords in English
- fluid temperature measurement, new design thermometer, dynamic error, steam superheater, steam transient temperature
- DOI
- DOI:10.1016/j.energy.2019.03.049 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0360544219304530 Opening in a new tab
- Related project
- Opracowanie nowoczesnych metod oceny trwałości resztkowej elementów ciśnieniowych instalacji energetycznych (OTREC). . Project leader at PK: , ,
Projects financed by NCRD [Projekty finansowane przez NCBiR (NCBR (] - Language
- eng (en) English
- Score (nominal)
- 200
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT436aae0d2bcf47e7997c364b5b3e6c5c/
- URN
urn:pkr-prod:CUT436aae0d2bcf47e7997c364b5b3e6c5c
* 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.