Increase the flexibility of steam boilers by optimisation of critical pressure component heating
Authors:
- Dawid Taler,
- Piotr Dzierwa,
- Karol Kaczmarski,
- Jan Taler
Abstract
The paper presents a new method for determining the optimum fluid temperature changes during heating cylindrical thick-walled components weakened by holes. An inverse heat conduction problem was solved to determine the temperature of the fluid so that the equivalent total stress due to pressure and thermal load at the edge of the hole at the point of concentration does not exceed the allowable stress. The stress concentration factor at the edge of the hole was determined using the Finite Element Method (FEM) to represent the actual shape of the junction between the element and the stub. Optimum temperature changes of the steam-water mixture in the boiler drum and live steam temperature in the outlet header of the final superheater during the boiler start-up were determined. Based on the optimum time temperature and pressure variations determined for all boiler pressure elements, it is possible to identify the critical element. The heating time for the critical element is the longest. The critical boiler element governs the process of boiler start-up. The flexibility of the boiler can be significantly improved using the proposed method as boiler start-up times can be shortened by approximately one-third compared to current practice.
- Record ID
- CUTbad854906fd04ba2aff2f9981d1f0791
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2022
- Vol
- 250
- Pages
- [1-18]
- Article number
- 123855
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 17-18; Bibliografia (liczba pozycji) - 32; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 250
- Keywords in English
- boiler flexibility, heating of pressure elements, selection of a critical element, comparison with standards, reduced start-up time
- ASJC Classification
- ;
- DOI
- DOI:10.1016/j.energy.2022.123855 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0360544222007587 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 200
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTbad854906fd04ba2aff2f9981d1f0791/
- URN
urn:pkr-prod:CUTbad854906fd04ba2aff2f9981d1f0791
* 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.