title: Extension of weighted sum of gray gas data to mathematical simulation of radiative heat transfer in a boiler with gas-soot media.
abstract: 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.
authors.affiliation: Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Samira
authors.identifier: 0000-0001-8090-4349
authors.initials: S
authors.lastname: Gharehkhani
authors.affiliation: School of Mechanical Engineering, Sharif University of Technology, Tehran 11365-956, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Nouri-Borujerdi
authors.affiliation: Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Salim Newaz
authors.initials: SN
authors.lastname: Kazi
authors.affiliation: Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Hooman
authors.identifier: 0000-0002-0904-198X
authors.initials: H
authors.lastname: Yarmand
mesh_terms: D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D008962:Models, Theoretical; D053260:Soot / Q000737:chemistry*; D013696:Temperature
chemical_list: D005740:Gases; D053260:Soot