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The Scientific World Journal
Volume 2014 (2014), Article ID 504601, 9 pages
Research Article

Extension of Weighted Sum of Gray Gas Data to Mathematical Simulation of Radiative Heat Transfer in a Boiler with Gas-Soot Media

1Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
2School of Mechanical Engineering, Sharif University of Technology, Tehran 11365-956, Iran

Received 10 December 2013; Accepted 19 January 2014; Published 6 March 2014

Academic Editors: V. Bubnovich and M. Yao

Copyright © 2014 Samira Gharehkhani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this study an expression for soot absorption coefficient is introduced to extend the weighted-sum-of-gray gases data to the furnace medium containing gas-soot mixture in a utility boiler 150 MWe. Heat transfer and temperature distribution of walls and within the furnace space are predicted by zone method technique. Analyses have been done considering both cases of presence and absence of soot particles at 100% load. To validate the proposed soot absorption coefficient, the expression is coupled with the Taylor and Foster's data as well as Truelove's data for CO2-H2O mixture and the total emissivities are calculated and compared with the Truelove's parameters for 3-term and 4-term gray gases plus two soot absorption coefficients. In addition, some experiments were conducted at 100% and 75% loads to measure furnace exit gas temperature as well as the rate of steam production. The predicted results show good agreement with the measured data at the power plant site.