Wyniki wyszukiwania - BazTech

1

Trójwymiarowe modelowanie spalania węgla w kotle energetycznym z paleniskiem tangencjalnym

Filkowski R., Petrovski I., Karaś P.

Energetyka

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2004

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nr 3

145-145

PL

Przedstawiono trójwymiarową symulację procesów przepływu i spalania w tangencjalnym palenisku energetycznego kotła pyłowego OB-380, wyprodukowanego przez RAFAKO SA, a eksploatowanego w Elektrowni Cieplnej Oslomej (Kićevo - Macedonia). Jako narzędzie numeryczne zastosowano oprogramowanie CFD Fluent. Podano dokładny opis i dane techniczne kotła.

EN

Presented is three-dimensional simulation of flow processes and combustion in the tangential furnace of the power dust boiler of OB-380 type manufactured by the RAFACO SA and operated in the Oslomej Power Station Kicevo - Macedonia). The CFC Fluent software was applied as and technical data of the boiler is given.

2

Temperature and flow fields in pulverized coal-fired boiler furnace

Filkoski R., Petrovski I., Gjurkov I.

Prace Naukowe Politechniki Warszawskiej. Konferencje

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2001

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z. 21

91-100

EN

Thc article presents a numerical simulation ofa utililty boiler OB-380 in the Thermal Power Station "Oslomej", Republic of Macedonia. Thc coal-fired boiler has aiready reached its design operational age and certain reconstruction clutches will be inevitable soon. Fluent CFD sofiware was used as a tool to create the model in 3-D domain. The simulation results were compared to the available data gathered from the boiler monitoring system. The presented test case shows that a complex three-dimensional computation of the boiler furnace characteristics can facilitate the solution of many difficulties related to its current operation or scheduled retrofit; for instance, altering burner system or installing OFA ports. Presented method seems to be an attractive way of analysing the influence of the boiler design to its operation and how planned changes of the fuel supply system, fuel type and milling quality would affect heat transfer, temperature distribution, heat fluxes, combustion effectiveness, level of NOx emission, crosion of heat exchanging surfaccs, as well as other issues of interest.

3

CFD predictions of boiler performances when fired with alternative fuel

Filkoski R., Petrovski I., Stojkovski V.

Prace Naukowe Politechniki Warszawskiej. Konferencje

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2001

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z. 21

81-89

EN

Steam boilers of G-32 type. located in Skopje Steel Work power plant, initially proposed to use metallurgical gases from rotary furnaces, now belong (o the Electric Power Company of Macedonia, Branch "Energetika" Skopje. Under the recent operating conditions the boilers were fueled with heavy oil, causing significant environmental damages, since the plant is located in the city area. The objective of this work is to examine numerically the effects of the substitution of crude oil with gaseous fuel to the operation and performances of the G-32 steam boiler. It was performed using the computational fluid dynamics modeling approach. Fluent CFD software was used as a tool to create a three dimensional model of the mentioned boiler. The present simulations provide flow fields, temperature profiles and heat flux profiles to the furnace walls in case when boiler is fired with oil and, altematively, with natural gas. This approach provided far more information than was possible using physical model testing. Initially obtained results are encouraging, showing that the predictions are in qualitative agreement with the expectations and practical experiences.

4

Modelling of thermal processes in pulverized-coal fired boilers - an overall programming frame

Filkoski R., Petrovski I.

Prace Naukowe Politechniki Warszawskiej. Mechanika

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1999

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z. 181

52-60

EN

This paper presents the first steps of numerical modelling of pulverized-coal fired boiler furnaces. The purpose of the model is to give a three-dimensional description of the overall process in the furnace, including gas and solids flow, fuel conversion, homogenous and catalytic gas reactions and heat transfer to the furnace walls. Physical grounds and assumptions on which the model is based are given in the article, as well as the simplified algorithm of the calculations. Aerodynamically, the material in the furnace is considered as a heterogenous turbulence flow, consisting of gaseous phase (air and flue gases mixture) and solid dispersed phase (fuel and ash particles). An analysis of the processes of pulverized coal combustion and heat transfer is accomplished on the basis of results of experimental research and theoretical modelling of the solid fuel combustion. Different effects are calculated separately and balanced in iteration loops. A combination of aproaches and submodels should lead to an overall model, which sufficiently describes the phenomena occuring in the furnace.