Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers
The paper presents the results of numerical computations performed for the furnace chamber waterwalls of a supercritical boiler with a steam output of 2400 × 103 kg/h. A model of distributed parameters is proposed for the waterwall operation simulation. It is based on the solution of equations descr...
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Polish Academy of Sciences Committee of Chemical and Process Engineering
2016-06-01
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| Series: | Chemical and Process Engineering |
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| Online Access: | http://www.degruyter.com/view/j/cpe.2016.37.issue-2/cpe-2016-0017/cpe-2016-0017.xml?format=INT |
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| author | Grądziel Sławomir Majewski Karol |
| author_facet | Grądziel Sławomir Majewski Karol |
| author_sort | Grądziel Sławomir |
| collection | DOAJ |
| description | The paper presents the results of numerical computations performed for the furnace chamber waterwalls of a supercritical boiler with a steam output of 2400 × 103 kg/h. A model of distributed parameters is proposed for the waterwall operation simulation. It is based on the solution of equations describing the mass, momentum and energy conservation laws. The aim of the calculations was to determine the distribution of enthalpy, mass flow and fluid pressure in tubes. The balance equations can be brought to a form where on the left-hand side space derivatives, and on the right-hand side – time derivatives are obtained. The time derivatives on the right-hand side were replaced with backward difference quotients. This system of ordinary differential equations was solved using the Runge-Kutta method. The calculation also takes account of the variable thermal load of the chamber along its height. This thermal load distribution is known from the calculations of the heat exchange in the combustion chamber. The calculations were carried out with the zone method. |
| format | Article |
| id | doaj-art-893926e3f41e4c10b88d2eb945f963e2 |
| institution | DOAJ |
| issn | 2300-1925 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Polish Academy of Sciences Committee of Chemical and Process Engineering |
| record_format | Article |
| series | Chemical and Process Engineering |
| spelling | doaj-art-893926e3f41e4c10b88d2eb945f963e22025-08-20T03:10:52ZengPolish Academy of Sciences Committee of Chemical and Process EngineeringChemical and Process Engineering2300-19252016-06-0137219921310.1515/cpe-2016-0017cpe-2016-0017Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilersGrądziel Sławomir0Majewski Karol1Cracow University of Technology, Institute of Thermal Power Engineering, al. Jana Pawła II 37, 31-864 Kraków, PolandCracow University of Technology, Institute of Thermal Power Engineering, al. Jana Pawła II 37, 31-864 Kraków, PolandThe paper presents the results of numerical computations performed for the furnace chamber waterwalls of a supercritical boiler with a steam output of 2400 × 103 kg/h. A model of distributed parameters is proposed for the waterwall operation simulation. It is based on the solution of equations describing the mass, momentum and energy conservation laws. The aim of the calculations was to determine the distribution of enthalpy, mass flow and fluid pressure in tubes. The balance equations can be brought to a form where on the left-hand side space derivatives, and on the right-hand side – time derivatives are obtained. The time derivatives on the right-hand side were replaced with backward difference quotients. This system of ordinary differential equations was solved using the Runge-Kutta method. The calculation also takes account of the variable thermal load of the chamber along its height. This thermal load distribution is known from the calculations of the heat exchange in the combustion chamber. The calculations were carried out with the zone method.http://www.degruyter.com/view/j/cpe.2016.37.issue-2/cpe-2016-0017/cpe-2016-0017.xml?format=INTwaterwall tubessupercritical steam boilermathematical modelenergy balancethermal load |
| spellingShingle | Grądziel Sławomir Majewski Karol Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers Chemical and Process Engineering waterwall tubes supercritical steam boiler mathematical model energy balance thermal load |
| title | Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers |
| title_full | Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers |
| title_fullStr | Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers |
| title_full_unstemmed | Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers |
| title_short | Simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers |
| title_sort | simulation of heat transfer in combustion chamber waterwall tubes of supercritical steam boilers |
| topic | waterwall tubes supercritical steam boiler mathematical model energy balance thermal load |
| url | http://www.degruyter.com/view/j/cpe.2016.37.issue-2/cpe-2016-0017/cpe-2016-0017.xml?format=INT |
| work_keys_str_mv | AT gradzielsławomir simulationofheattransferincombustionchamberwaterwalltubesofsupercriticalsteamboilers AT majewskikarol simulationofheattransferincombustionchamberwaterwalltubesofsupercriticalsteamboilers |