Optimisation of heating and cooling of pressure thick-walled components operating in the saturated steam area
Authors:
- Dawid Taler,
- Piotr Dzierwa,
- Karol Kaczmarski,
- Jan Taler
Abstract
The paper presents a new method of determining optimum temperature variations of the fluid during heating and cooling of cylindrical thick-walled components weakened by holes. The temperature of the fluid located or flowing through the pressure component is equal to the saturation temperature. The stress concentration factors at the edges of the holes were determined using the Finite Element Method (FEM) to represent the real construction of the junction between the element and the spigot. Optimum fluid temperature variations were determined so that the maximum equivalent stress at the edge of the opening is equal to the permissible stress determined concerning thermal fatigue. The equivalent stress at the hole edge at the point of its concentration includes thermal stress and stress due to pressure. Optimum temperature changes of hot water and steam-water mixture were determined during heating up and cooling down of the boiler drum, i.e., during boiler start-up and shutdown. Three-dimensional computations of the transient field of temperature and stress were carried out for the junction of the drum and downcomer to show that the equivalent stress at the edge of the hole does not exceed the allowable stress if the optimum temperature of the fluid was estimated by the proposed method.
- Record ID
- CUT6899fff87c5a49718d0c3bb4b5c2a5d6
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2021
- Vol
- 231
- Pages
- [1-12]
- Article number
- 120917
- Other elements of collation
- schem.; wykr.; Bibliografia (na s.) - 12; Bibliografia (liczba pozycji) - 31; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 231
- Keywords in English
- flexibility of thermal power plants, optimum fluid temperature variation, cylindrical pressure component, heating and cooling of the boiler drum
- DOI
- DOI:10.1016/j.energy.2021.120917 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0360544221011658 Opening in a new tab
- 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/CUT6899fff87c5a49718d0c3bb4b5c2a5d6/
- URN
urn:pkr-prod:CUT6899fff87c5a49718d0c3bb4b5c2a5d6
* 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.