Dynamic simulation of fluidized bed combustors

Değirmenci, Engin


Simulation of circulating fluidized bed combustors
Göğebakan, Yusuf; Selçuk, Nevin; Department of Chemical Engineering (2006)
A dynamic mathematical model for simulation of atmospheric circulating fluidized bed combustors has been developed on the basis of first principles and empirical correlations. The model accounts for dense and dilute zone hydrodynamics, volatiles release and combustion, char particles combustion and their size distribution, and heat transfer from/to gas, particles, waterwalls and refractory. Inputs to the model include configuration and dimensions of the combustor and its internals, air and coal flows, coal ...
Nongray gas and nongray particle effects in modeling fluidized bed combustors
Ateş, Cihan; Külah, Görkem; Selçuk, Nevin; Department of Chemical Engineering (2018)
Thermal radiation accounts for the majority of the heat transferred in combusting systems where it is constituted of the contributions from both participating gases and solid particles; hence gas and particle radiative properties play an important role. In spite of the lower operating temperatures (750-950 ºC), radiation is still predominant mode of heat transfer in fluidized bed combustors (FBCs) due to the presence of higher particle loads in the flue gas. Therefore, modelling of radiative heat transfer i...
Mathematical Modeling of a Bubbling Fluidized Bed Combustor Cofired with Lignite and Biomass
Külah, Görkem; Selçuk, Nevin (2010-01-01)
A comprehensive system model of fluidized bed combustor, previously developed and tested for the prediction of combustion behavior of fluidized bed combustors fired with lignite was extended for the modeling of cofiring of lignite with biomass by incorporating volatile release, char combustion, and population balance for biomass. The model predictions were validated against measurements taken on a Middle East Technical University 0.3 MWt Atmospheric Bubbling Fluidized Bed Combustor fired with lignite only, ...
Molecular analysis of a unique type of thalassemia
Balta, Günay; Kocabıyık, Semra; Department of Biology (1994)
The Impact of palestinian refugees on Lebanese politics
Köse, Handan Hilal; Tür Küçükkaya, Özlem; Department of Middle East Studies (2012)
The overall purpose of this thesis is to analyze the impact of the Palestinian refugees on Lebanese politics. The role of the Palestinian refugees in Lebanon is discussed within the framework of explaining the political character of the Lebanese state. In this context the Lebanese state’s perception concerning the Palestinians refugees in Lebanon is analyzed through explaining the living conditions of the refugees and the Palestinian military and political activities in Lebanon as well as the restrictions o...
Citation Formats
E. Değirmenci, “Dynamic simulation of fluidized bed combustors,” Ph.D. - Doctoral Program, Middle East Technical University, 2000.