Evaluation of gas radiation models in CFD modeling of oxy-combustion

M. A. Rajhi, R. Ben-Mansour, M. A. Habib, M. A. Nemitallah*, K. Andersson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Proper determination of the radiation energy is very important for proper predictions of the combustion characteristics inside combustion devices using CFD modeling. For this purpose, different gas radiation models were developed and applied in the present work. These radiation models vary in their accuracy and complexity according to the application. In this work, a CFD model for a typical industrial water tube boiler was developed, considering three different combustion environments. The combustion environments are air-fuel combustion (21% O2 and 79% N2), oxy-fuel combustion (21% O 2 and 79% CO2) and oxy-fuel combustion (27% O2 and 73% CO2). Simple grey gas (SGG), exponential wide band model (EWBM), Leckner, Perry and weighted sum of grey gases (WSGG) radiation models were examined and their influences on the combustion characteristics were evaluated. Among those radiation models, the EWBM was found to provide close results to the experimental data for the present boiler combustion application. The oxy-fuel combustion characteristics were analyzed and compared with those of air-fuel combustion.

Original languageEnglish
Pages (from-to)83-97
Number of pages15
JournalEnergy Conversion and Management
Volume81
DOIs
StatePublished - May 2014

Bibliographical note

Funding Information:
The authors wish to acknowledge the support received from King Abdulaziz City for Science and Technology (KACST) through The Vice-Rectorship of Applied and Scientific Research at KFUPM under KACST project# AT-29-89.

Keywords

  • Air combustion
  • Computational fluid dynamics (CFD)
  • Gas radiation models
  • Oxy-fuel combustion

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

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