CFD modeling of thermal processes in the firebox and heat load distribution on the screen surface firebox

被引:0
作者
Lohvyniuk, Maksym [1 ]
Novakivskyi, Yevhen [1 ]
机构
[1] Natl Tech Univ Ukraine, Educ & Sci Inst Atom & Thermal Energy, Dept Nucl Power Engn, Igor Sikorsky Kyiv Polytech Inst, 5 Bldg,6 Polytech Ave, UA-03056 Kiev, Ukraine
关键词
Heat perception; Firebox; Burner; Active combustion zone; Posture calculation; Screen tubes; Reduction ofNOx emissions; Thermal calculation; CFD modeling of combustion; PULVERIZED-COAL BOILER; NOX EMISSION; COMBUSTION; HYDRODYNAMICS;
D O I
10.1016/j.heliyon.2024.e27324
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Using ANSYS FLUENT numerical modeling and mathematical modeling, the main characteristics of combustion processes during the combustion of natural gas were determined. In this work, the combustion processes and NO x formation in the firebox were modeled at different loads of the GM- 50-14/250 boiler. The temperature distribution along the height of the firebox and the heat load on the screen panels were determined. The results of calculations by two types of models were compared with each other and with the data of measurements on the operating equipment. The environmental performance of the firebox, namely the formation of NO x at different heat loads, was determined. The maximum boiler capacity at which its operation meets European environmental standards was determined. The deviation of calculations on the formation of NO x in the GM -50-14/250 boiler at 40% of the rated power compared to the results of field tests using ANSYS FLUENT modeling was 8%, and using the mathematical model - 27%. When operating at rated power, the deviations of the results decreased to 2% and 8%, respectively. The deviation of the results of thermal calculations of the combustion in the firebox by different types of modeling in the active combustion zone and at the outlet of the firebox is up to 3% at different loads.
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页数:24
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