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Title: Investigation of heat transfer and combustion in the advanced fluidized bed combustor (FBC)

Abstract

This technical report summarizes the research conducted and progress achieved during the period from April 1, 1998 to June 30, 1998. The numerical simulation was continued to determine the concentration distribution of the gas species, heat flux and heat transfer coefficients in the hot combustor model. The different gas concentration profiles showed the gas mixing characteristics along the combustor height. The center zone of the combustor has a relatively high methane mass concentration. The injection of secondary air squeezes the uprising flue gas and methane that causes the fuel-lean zone near the secondary air nozzles. The carbon dioxide concentration increased with the increasing of the combustor height. The peak concentration of oxygen remains at the combustor wall because of the secondary injection. The heat flux on the wall of the upper chamber is much higher than that of the lower chamber. It is believed that the heat flux is affected by the designed strong swirl and secondary air injection. The heat transfer coefficient changes along the combustor height were also affected by the multiple secondary air injection. The numerical simulation results could verify the predictions of the experimental results. It is a quite similar trend of the heat transfer coefficientmore » changes based on the combustion test results.« less

Authors:
Publication Date:
Research Org.:
Federal Energy Technology Center, Morgantown, WV (US); Federal Energy Technology Center, Pittsburgh, PA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
775209
Report Number(s):
DE-FG22-93MT93006-14
TRN: AH200110%%165
DOE Contract Number:  
FG22-93MT93006
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CARBON DIOXIDE; COMBUSTION KINETICS; FLUE GAS; FLUIDIZED-BED COMBUSTORS; FLUIDIZED-BED COMBUSTION; HEAT FLUX; HEAT TRANSFER; MATHEMATICAL MODELS; COAL

Citation Formats

Lee, S.W. Investigation of heat transfer and combustion in the advanced fluidized bed combustor (FBC). United States: N. p., 1999. Web. doi:10.2172/775209.
Lee, S.W. Investigation of heat transfer and combustion in the advanced fluidized bed combustor (FBC). United States. doi:10.2172/775209.
Lee, S.W. Wed . "Investigation of heat transfer and combustion in the advanced fluidized bed combustor (FBC)". United States. doi:10.2172/775209. https://www.osti.gov/servlets/purl/775209.
@article{osti_775209,
title = {Investigation of heat transfer and combustion in the advanced fluidized bed combustor (FBC)},
author = {Lee, S.W.},
abstractNote = {This technical report summarizes the research conducted and progress achieved during the period from April 1, 1998 to June 30, 1998. The numerical simulation was continued to determine the concentration distribution of the gas species, heat flux and heat transfer coefficients in the hot combustor model. The different gas concentration profiles showed the gas mixing characteristics along the combustor height. The center zone of the combustor has a relatively high methane mass concentration. The injection of secondary air squeezes the uprising flue gas and methane that causes the fuel-lean zone near the secondary air nozzles. The carbon dioxide concentration increased with the increasing of the combustor height. The peak concentration of oxygen remains at the combustor wall because of the secondary injection. The heat flux on the wall of the upper chamber is much higher than that of the lower chamber. It is believed that the heat flux is affected by the designed strong swirl and secondary air injection. The heat transfer coefficient changes along the combustor height were also affected by the multiple secondary air injection. The numerical simulation results could verify the predictions of the experimental results. It is a quite similar trend of the heat transfer coefficient changes based on the combustion test results.},
doi = {10.2172/775209},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}