Study on Thermal Characteristics of a High Temperature Air Combustion Boiler (2nd Report, Numerical Study)

Hiromichi Kobayashi, Kunio Yoshikawa

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)2330-2336
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume69
Issue number686
DOIs
Publication statusPublished - 2003 Oct

Keywords

  • Boiler
  • Computational Fluid Dynamics
  • Diffusion Combustion
  • Heat Transfer
  • High Temperature Air Combustion
  • Waste Heat Recovery

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Study on Thermal Characteristics of a High Temperature Air Combustion Boiler (2nd Report, Numerical Study)'. Together they form a unique fingerprint.

  • Cite this