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UBC Theses and Dissertations
Modeling of steady state heat release, oxygen profile and temperature profile in circulating fluidized bed combustors Ju, Dale Wen-Ching
Abstract
A computer model, using the Monte Carlo method, was developed to predict heat release, oxygen profiles and temperature profiles in Circulating Fluidized Bed (CFB) combustors. The model includes initial devolatilization of the coal feed, a correction in the evolved volatiles region based on the plume model, char combustion, an oxygen mass balance to determine the oxygen profile, and an energy balance to detenriine the temperature profile. The highly non-linear energy balance equation includes conduction, particle and gas convection and radiative heat transfer terms. A number of studies were conducted to observe how the model's prediction changes with superficial gas velocities of 6 m/s and 7 m/s, and solids recirculation rates of 15, 30 and 50 kg/m²s, for both the UBC CFB and the Studsvik CFB. A validation of the model's partial pressure of oxygen profile predictions compared to experimental data was made for the UBC CFB test case.
Item Metadata
Title |
Modeling of steady state heat release, oxygen profile and temperature profile in circulating fluidized bed combustors
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1995
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Description |
A computer model, using the Monte Carlo method, was developed to predict heat
release, oxygen profiles and temperature profiles in Circulating Fluidized Bed (CFB)
combustors. The model includes initial devolatilization of the coal feed, a correction in the
evolved volatiles region based on the plume model, char combustion, an oxygen mass
balance to determine the oxygen profile, and an energy balance to detenriine the
temperature profile. The highly non-linear energy balance equation includes conduction,
particle and gas convection and radiative heat transfer terms.
A number of studies were conducted to observe how the model's prediction
changes with superficial gas velocities of 6 m/s and 7 m/s, and solids recirculation rates of
15, 30 and 50 kg/m²s, for both the UBC CFB and the Studsvik CFB.
A validation of the model's partial pressure of oxygen profile predictions compared
to experimental data was made for the UBC CFB test case.
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Extent |
8186716 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-01-21
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0058562
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1995-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.