Temat: windbox - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Numerical optimization of air flow in the plenum chamber of an industrial CFB boiler
Autorzy:: Mirek, P.
Jabłoński, J.
Nowak, W.
Tematy:: windbox
air distributor
circulating fluidized bed; Pokaż więcej
Wydawca:: Politechnika Gdańska
Powiązania:: https://bibliotekanauki.pl/articles/1943239.pdf Link otwiera się w nowym oknie
Opis:: The article presents the results of experimental and numerical studies on windboxes operating in a 235MWe Circulating Fluidized Bed (CFB) boiler. The main problems of windbox designs have been identified and a modified internal geometry has been proposed which causes a more uniform flow under the grid and prevents the velocity field from formation of dead zones.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Modeling of a Primary Air Distribution in a Plenum Chamber of the 700 MWth Circulating Fluidized Bed Boiler
Autorzy:: Mirek, Paweł
Tematy:: windbox
circulating fluidized bed boiler
fluidization
primary air; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2201878.pdf Link otwiera się w nowym oknie
Opis:: The windbox is a compressed air chamber installed directly beneath the fluidized bed boiler grid and is designed to evenly distribute air across the entire cross-section of the air distributor. Due to the large volume of the plenum chambers, it is very difficult to experimentally determine the flow conditions within them. Therefore, the analysis of airflow in these devices is usually performed using computational fluid dynamics tools. The article presents the results of modeling primary air distribution in the plenum chamber of the 700 MWth circulating fluidized bed boiler operating in PGE GiEK S.A. Turów Power Plant Division. Based on the results of calculations performed using the ANSYS Fluent software, the basic problems of the design windbox geometry were identified and a method for improving the uniformity of the gas flow under the grid was proposed. As can be seen from the results obtained, the design geometry of the windbox does not provide the required uniformity of air distribution under the grid.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 3.

Tytuł:: The effect of parallel hot windbox repowering on 387 MW fossil fuel power plant
Autorzy:: Harutyunyan, A.
Badyda, K.
Wołowicz, M.
Tematy:: combined cycle power plant
fossil boiler
hot windbox repowering
CO2 emissions; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/175190.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the concept of repowering in existing power plant. Among technologies for existing steam power plants, the hot windbox repowering is the fastest way to respond to the energy demand, improve efficiency and reduce the pollutants emissions. Thermodynamic analysis of power plant model with fossil boiler before and after hot windbox repowering, has been investigated using commercial software. The purpose of this work is to understand and analyze the effect of hot windbox repowering on 387 MW fossil fuel power plant as well as the effect of additional heat exchangers, which have been installed parallel with regeneration system to use the heat of boiler exhaust gases. In this way, after repowering the summary power of power plant in base load is 615 MW, which has been reached adding gas turbine (176.9 MW). To analyze the model, calculations were performed in 3 stages: 1) calculation and comparison of the thermodynamic parameters as well as carbon dioxide emissions of power plant model before and after repowering, 2) analysis of the optimal value of feed water mass flow through heat exchangers installed after economizer, 3) calculation of thermodynamic parameters in values 100%, 90%, 80% and 75% of fossil boiler heat loads.
Dostawca treści:: Biblioteka Nauki

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