PAPERS SELECTED FOR THE SYMPOSIUM

• NUMERICAL SIMULATION OF THE INFLUENCE OF THE STATIONARY LOUVER AND PARTICLE SIZE ON COAL POWDER DISTRIBUTION I N POWER PLANT BURNING CHANNELS

  G. Živković, S. Nemoda, P. Stefanović P. Radovanović - Institut za nuklearne nauke VINČA, Laboratorija za termotehniku i energetiku

  Abstract Text

  One of the key requirements for implementation of plasma system for oil free combustion support on power plant boilers is a regulation of coal powder distribution in burning channels, in order to achieve adequate concentration of coal powder in the... show full text »
  Abstract Text

  One of the key requirements for implementation of plasma system for oil free combustion support on power plant boilers is a regulation of coal powder distribution in burning channels, in order to achieve adequate concentration of coal powder in the zone where thermal plasma is introduced. This can be efficiently achieved by introduction of the stationary louver in the mixing channel in front of the burning channels. This paper deals with the numerical simulation of two phase flow of the air-coal powder mixture in the mixing channel, and analysis of the influence of the coal powder size on the powder mass distribution among burning channels. Numerical simulation was performed by FLUENT 6.3 commercial code. Results show considerable influence of particle size on the overall distribution. It also confirmed stationary louver as efficient tool for separating phases, through its stronger influence on discrete than on continuous phase flow profile. « hide
  Symposium Session: Thermal, hydro, wind and other Power Plants | Eksploatacioni problemi termo, hidro, vetro i drugih elektrana

• NUMERICAL ANALYSIS OF THE INFLUENCE OF LOUVERS ON THE COAL POWDER DISTRIBUTION IN BOILER BURNING CHANNELS ON TENT-A6

  G. Živković, S. Nemoda, P. Stefanović P. Radovanović - Institut za nuklearne nauke VINČA, Laboratorija za termotehniku i energetiku

  Abstract Text

  The measurements performed in 2006 on a boiler of TENT-A1 showed that the distribution of the air-coal powder mixture over the burning channels is not appropriate, and that the amount of coal powder to the higher burners should be reduced.... show full text »
  Abstract Text

  The measurements performed in 2006 on a boiler of TENT-A1 showed that the distribution of the air-coal powder mixture over the burning channels is not appropriate, and that the amount of coal powder to the higher burners should be reduced. In order to achieve this a system of louvers were applied. This paper deals with the numerical simulation of two phase flow of the air-coal powder mixture in the domain where louvers were settled and in burning channels as well, as a prerequisite for the louver introduction. The emphasize was put on the analysis of the louver geometry characteristics and the louver inclination angle, as a mean parameters which determine powder distribution among the burners. Numerical simulation was performed by FLUENT 6.3 commercial code. It was concluded that louvers represent an efficient tool for the redistribution of coal mixture over the burning channels. Their mutual position is of the crucial importance in managing the coal powder flow. The separation distance between the louver blades at some extent influences the flow pattern, but does not represent dominant parameter, as well as the louver blade inclination angle. « hide
  Symposium Session: Thermal, hydro, wind and other Power Plants | Eksploatacioni problemi termo, hidro, vetro i drugih elektrana