The flexible boiler operation in a wide range of load changes with considering the strength and environmental restrictions
Authors:
- Jan Taler,
- Marcin Trojan,
- Piotr Dzierwa,
- Karol Kaczmarski,
- Bohdan Węglowski,
- Dawid Taler,
- Wiesław Zima,
- Sławomir Grądziel,
- Paweł Ocłoń,
- Tomasz Sobota,
- Monika Rerak,
- Magdalena Jaremkiewicz
Abstract
Thermal steam units cooperating in one power system with wind and photovoltaic farms must have high flexibility, i.e., operate over a wide range of load variations, typically between 40 and 100%. In addition, the start-up and shutdown time of the unit should be short. Thick-walled pressure components that limit the fast start-up of the units are turbines, steam boilers, and pipeline branches due to the occurrence of high thermal stresses in them. This paper determines the allowable heating rates of thick-walled components of a 97.22 kg/s natural circulation steam boiler. The boiler drum is the critical element, with a heating time of about 6000 s from the cold state. Computer simulations of the boiler combustion chamber were also performed at three different loads, i.e., 100, 60 and 40%. The calculations show that the maximum emissions of harmful substances do not exceed the permissible values given in European regulations: CO ≤ 140 mg/m3 n and NOx ≤ 100 mg/m3 n . The maximum content of CO = 136.8 mg/m3 n occurs at 60% boiler load. The maximum content of NOx = 217.3 mg/m3 n in the exhaust gas upstream of the SCR (Selective Catalytic Reduction) system occurs at 40% load, but downstream of the SCR system is reduced below the limit value 100 mg/m3 n.
- Record ID
- CUTa513e2f3d07945499b41c254a4bbd405
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2023
- Vol
- 263
- No
- Pt. B
- Pages
- [1-14]
- Article number
- 125745
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 13-14; Bibliografia (liczba pozycji) - 35; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 263, Pt. B
- Keywords in English
- steam boilers, flexibility, heating rate, partial boiler loads, pollutant emissions, CFD modelling
- ASJC Classification
- ;
- DOI
- DOI:10.1016/j.energy.2022.125745 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/abs/pii/S0360544222026317 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/CUTa513e2f3d07945499b41c254a4bbd405/
- URN
urn:pkr-prod:CUTa513e2f3d07945499b41c254a4bbd405
* 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.