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

Więckowski Ł., Krawczyk P., Badyda K.

Journal of Power Technologies

2017

Vol. 97, nr 5

359--365

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.

The designing of gases energy recovery in high-temperature process

Mocek P.

Journal of Power Technologies

2015

Vol. 95, nr 1

67--72

This paper deals with the combined process of production of ferrosilicon and power in an arc resistance furnace. Selected results of mathematical modeling of key installation units are presented. To this end, mathematical modeling, balance measuring methods and practical experience were used. From among the many activities required to implement the project, the author chose ones associated with: the furnace hearth, after-combustion area, flue gases and recuperator channel as well as the recovery system and flow characteristics of the device. The presented modeling study forms part of a new design method termed the integration of computational processes.

Modeling of pulsating flow in a collapsible wall

Veshkina N., Zbiciński I., Obidowski D.

Inżynieria i Aparatura Chemiczna

2010

Nr 1

117-118

The paper presents the methodology for verification of Fluid Structure Interaction (FS1) model for silicone pipe reflecting pulsating blood vessel in human body. The 3-term Yeoh model for strain energy density function was used in order to describe nonlinear behavior of siliconc material. To dctcr-:. mine the boundary conditions for CFD simulations our own experimental set-up was designed. A good agreement between simulation and experiment was achieved.

W artykule przedstawiono metodę weryfikacji modelu (FSI) dla silikonowej rurki odzwierciedlającej zachowanie pulsującego naczynia krwionośnego z przepływającą wewnątrz krwią. Przy pomocy trój członowego modelu Yeoha funkcji gęstości energii naprężenia rozważono nieliniowe zachowanie materiału silikonowego. Aby uzyskać warunki brzegowe do symulacji CFD przeprowadzono badania na specjalnie do tego celu zbudowanej aparaturze. Otrzymano dobre dopasowanie danych z symulacji do eksperymentu.