Numerical investigation of temperature distribution in the furnace of a coal fired grate boiler in part load conditions

• Autorzy: Więckowski Ł. , Krawczyk P. , Badyda K.
• Języki publikacji: EN

Abstrakty

EN

Gas temperature distribution along the grate length in part load conditions is expected to be non-uniform and vary significantly from the nominal. The objective of this work was to simulate the combustion process inside the furnace of a WR-25 coal fired grate boiler at two part load conditions. The results obtained were then compared to on-site temperature profile measurements taken 0.8, 2 and 3.5 meters above the grate level. Numerical analysis was performed using a commercial CFD (computational fluid dynamics) code. Boundary conditions at the grate-freeboard interface were calculated with a black-box type model. Off-design air distribution along the grate was taken into account based on real unit inspection. Model predictions demonstrated a good overall qualitative match with measured temperature profiles, but a quantitative comparison shows a need for improvements in the modeling. It was also shown that more attention needs to be paid to the modeling of soot, as it has a major impact on predicted temperatures.

Słowa kluczowe

EN

coal firing; grate boiler; combustion; soot; computational fluid dynamics

PL

spalanie węgla; kocioł rusztowy; spalanie; sadza; dynamika obliczeniowa płynów

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2017
• Tom: Vol. 97, nr 5
• Strony: 359--365
• Opis fizyczny: Bibliogr. 26 poz., rys., tab., wykr.

Twórcy

autor

Więckowski Ł.

• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665, Warsaw, Poland

autor

Krawczyk P.

• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665, Warsaw, Poland

autor

Badyda K.

• Institute of Heat Engineering, Warsaw University of Technology, Nowowiejska 21/25, 00-665, Warsaw, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).