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http://dx.doi.org/10.3795/KSME-B.2013.37.2.197

Effect of Flame Radiative Heat Transfer in Horizontal-Type HRSG with Duct Burner  

Kim, Daehee (Dept. of Mechanical Engineering, Korea Advanced Institute of Science & Technology)
Kim, Seungjin (Dept. of Mechanical Engineering, Korea Advanced Institute of Science & Technology)
Choi, Sangmin (Dept. of Mechanical Engineering, Korea Advanced Institute of Science & Technology)
Lee, Bong Jae (Dept. of Mechanical Engineering, Korea Advanced Institute of Science & Technology)
Kim, Jinil (R&D Institute, Doosan Heavy Industries & Construction)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.37, no.2, 2013 , pp. 197-204 More about this Journal
Abstract
A method was developed for analyzing the radiation heat transfer from the duct burner flame to the heat exchanger in a heat recovery steam generator (HRSG) in order to supplement the existing thermal design process. The burner flame and the heat exchanger were considered to be imaginary planes, and the flame temperature, surface, and emissivity were simplified using an engineering approach. Three analysis cases in which the duct burner position and fuel were changed were considered. The calculated flame radiative heat transfer and local flux on the heating surface were compared with those of 3-atomic gas radiation and convection. In all analysis cases, heat transfer by 3-atomic gas radiation was very small. The ratio of the flame radiative heat transfer to the convection heat transfer on the heating surface was estimated to be as high as 8-41%. Moreover, the local heat flux on the heating surface centerline was dominated by flame radiative heat flux.
Keywords
Duct Burner; Heat Recovery Steam Generator; Flame Radiative Heat Transfer; Heat Exchanger;
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