Numerical Modelling of Steam Superheaters in Supercritical Boilers
This paper presents a numerical model of a four-pass supercritical steam superheater with a complex flow system. The specific heat of steam is a function of temperature and pressure, and the specific heat of flue gas is a function of temperature. Pressure and temperature changes along the length of...
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| Formatua: | Artikulua |
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MDPI AG
2023-03-01
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| Saila: | Energies |
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| Sarrera elektronikoa: | https://www.mdpi.com/1996-1073/16/6/2615 |
| _version_ | 1827750071533305856 |
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| author | Katarzyna Węglarz Dawid Taler Jan Taler Mateusz Marcinkowski |
| author_facet | Katarzyna Węglarz Dawid Taler Jan Taler Mateusz Marcinkowski |
| author_sort | Katarzyna Węglarz |
| collection | DOAJ |
| description | This paper presents a numerical model of a four-pass supercritical steam superheater with a complex flow system. The specific heat of steam is a function of temperature and pressure, and the specific heat of flue gas is a function of temperature. Pressure and temperature changes along the length of the tubes were also determined. The modified Churchill equation was used to calculate the steam-side friction factor of Darcy–Weisbach. The flue gas temperature variations behind the individual superheater tube rows were calculated. The steam and wall temperature distributions were determined in each tube row along its length. Knowing the temperature of the tube walls and the steam along the flow direction enables the selection of the correct steel grade for the tubes. Thanks to this advantage of the proposed method, the investment can be reduced in superheater construction without the danger of overheating the tube material. The results of the superheater simulation were compared with the results of measurements on the actual object. The proposed numerical method can find application in steam superheaters’ design and performance calculations. It can also be used to monitor superheater operating parameters, which are difficult to measure due to the high flue gas temperature. |
| first_indexed | 2024-03-11T06:38:21Z |
| format | Article |
| id | doaj.art-f64cd3986a2148d4b51a9664596b97ce |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T06:38:21Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f64cd3986a2148d4b51a9664596b97ce2023-11-17T10:48:34ZengMDPI AGEnergies1996-10732023-03-01166261510.3390/en16062615Numerical Modelling of Steam Superheaters in Supercritical BoilersKatarzyna Węglarz0Dawid Taler1Jan Taler2Mateusz Marcinkowski3Department of Thermal Processes, Air Protection and Waste Utilisation, Faculty of Environmental Engineering and Energy, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, PolandDepartment of Thermal Processes, Air Protection and Waste Utilisation, Faculty of Environmental Engineering and Energy, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, PolandDepartment of Energy, Faculty of Environmental Engineering and Energy, Cracow University of Technology, al. Jana Pawła II 37, 31-864 Cracow, PolandDepartment of Thermal Processes, Air Protection and Waste Utilisation, Faculty of Environmental Engineering and Energy, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, PolandThis paper presents a numerical model of a four-pass supercritical steam superheater with a complex flow system. The specific heat of steam is a function of temperature and pressure, and the specific heat of flue gas is a function of temperature. Pressure and temperature changes along the length of the tubes were also determined. The modified Churchill equation was used to calculate the steam-side friction factor of Darcy–Weisbach. The flue gas temperature variations behind the individual superheater tube rows were calculated. The steam and wall temperature distributions were determined in each tube row along its length. Knowing the temperature of the tube walls and the steam along the flow direction enables the selection of the correct steel grade for the tubes. Thanks to this advantage of the proposed method, the investment can be reduced in superheater construction without the danger of overheating the tube material. The results of the superheater simulation were compared with the results of measurements on the actual object. The proposed numerical method can find application in steam superheaters’ design and performance calculations. It can also be used to monitor superheater operating parameters, which are difficult to measure due to the high flue gas temperature.https://www.mdpi.com/1996-1073/16/6/2615live steam superheatermathematical modelsupercritical steam boilerpressure distributionwall temperature distribution |
| spellingShingle | Katarzyna Węglarz Dawid Taler Jan Taler Mateusz Marcinkowski Numerical Modelling of Steam Superheaters in Supercritical Boilers Energies live steam superheater mathematical model supercritical steam boiler pressure distribution wall temperature distribution |
| title | Numerical Modelling of Steam Superheaters in Supercritical Boilers |
| title_full | Numerical Modelling of Steam Superheaters in Supercritical Boilers |
| title_fullStr | Numerical Modelling of Steam Superheaters in Supercritical Boilers |
| title_full_unstemmed | Numerical Modelling of Steam Superheaters in Supercritical Boilers |
| title_short | Numerical Modelling of Steam Superheaters in Supercritical Boilers |
| title_sort | numerical modelling of steam superheaters in supercritical boilers |
| topic | live steam superheater mathematical model supercritical steam boiler pressure distribution wall temperature distribution |
| url | https://www.mdpi.com/1996-1073/16/6/2615 |
| work_keys_str_mv | AT katarzynaweglarz numericalmodellingofsteamsuperheatersinsupercriticalboilers AT dawidtaler numericalmodellingofsteamsuperheatersinsupercriticalboilers AT jantaler numericalmodellingofsteamsuperheatersinsupercriticalboilers AT mateuszmarcinkowski numericalmodellingofsteamsuperheatersinsupercriticalboilers |