TY - JOUR
T1 - Study on Thermal Characteristics of a High Temperature Air Combustion Boiler (2nd Report, Numerical Study)
AU - Kobayashi, Hiromichi
AU - Yoshikawa, Kunio
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2003/10
Y1 - 2003/10
N2 - Thermal characteristics of a high temperature air combustion boiler is numerically examined. The high temperature air combustion is realized using a preheated air of about 800°C∼1000°C under low oxygen content (∼5%). Numerical simulation reveals that more uniform temperature distribution in the boiler and higher heat transfer are obtainable using high temperature air in comparison with using normal temperature air owing to mild reactions in the high temperature field and heat recovery by regenerative burners. High speed injection of high temperature air into the boiler causes in-furnace exhaust gas recirculation, which results in low NOx emission. There is good agreement between experiment and numerical simulation in particular when using low calorific value gas, because more uniform temperature distribution is realized and average temperature in the boiler becomes lower.
AB - Thermal characteristics of a high temperature air combustion boiler is numerically examined. The high temperature air combustion is realized using a preheated air of about 800°C∼1000°C under low oxygen content (∼5%). Numerical simulation reveals that more uniform temperature distribution in the boiler and higher heat transfer are obtainable using high temperature air in comparison with using normal temperature air owing to mild reactions in the high temperature field and heat recovery by regenerative burners. High speed injection of high temperature air into the boiler causes in-furnace exhaust gas recirculation, which results in low NOx emission. There is good agreement between experiment and numerical simulation in particular when using low calorific value gas, because more uniform temperature distribution is realized and average temperature in the boiler becomes lower.
KW - Boiler
KW - Computational Fluid Dynamics
KW - Diffusion Combustion
KW - Heat Transfer
KW - High Temperature Air Combustion
KW - Waste Heat Recovery
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U2 - 10.1299/kikaib.69.2330
DO - 10.1299/kikaib.69.2330
M3 - Article
AN - SCOPUS:0346959950
VL - 69
SP - 2330
EP - 2336
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 686
ER -