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《Journal of Engineering for Thermal Energy and Power》 2003-02
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Flue-gas Calculation Model Used in the Study of Long-term Dynamic Characteristics of a Large-sized Boiler

LI Yun ze, YANG Xian yong (Department of Thermal Energy Engineering, Tsinghua University, Beijing, China, Post Code: 100084) //Journal of Engineering for Thermal Energy & Power.  
The study of long term dynamic characteristics of a large sized turbogenerator set requires a simplified, accurate and rapid calculation of flue gas heat release rate. To eliminate the main deficiency of currently used flue gas heat release simulation models the authors have deduced from Dybosky Broch formula of large sized boiler thermodynamic calculation a new flue gas heat release model for the simulation and analysis of dynamic characteristics. Moreover, through a concise analysis, simplification and deduction obtained was a method for calculating flue gas outlet temperatures and heat release rates in a dynamic process for various boiler heat exchange surfaces. The recommended easy to use flue gas calculation model offers a relatively accurate and simple expression of the variation mechanism of flue gas temperature and heat release rate of high temperature gases in the furnace and various gas pass heat exchange surfaces of a large sized boiler during a dynamic process. The flue gas calculation model has been used to simulate the dynamic characteristics of a 600MW supercritical power generation unit with rational and accurate simulation results being obtained.
【CateGory Index】: TK221
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