Tube-Wall Temperature Prediction of a 660-MW Ultra-Supercritical Double-Reheat Boiler under Flexible Peak Shaving
作者机构：School of Mechanical EngineeringShanghai Jiao Tong University
出 版 物：《Journal of Thermal Science》 (热科学学报(英文版))
年 卷 期：2024年第33卷第6期
页 面：2372-2385页
核心收录：
学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学]
主 题：compartment model double-reheat boiler enthalpy distribution flexible peak shaving tube-wall temperature
摘 要：Ultra-supercritical double-reheat boilers employ multiple temperature-regulating methods during flexible peak *** exposes the boiler to significant tube-wall temperature deviations and *** this study,a compartment model was developed to subdivide the overlapping high-temperature heating surfaces of a 660-MW double-reheat boiler into smaller *** model was verified using field experimental data and was applied to calculate the enthalpy and tube-wall temperature distributions under different *** addition,the effects of three temperature-regulating methods(swinging burners,regulating dampers,and flue gas recirculation) on the variation tendency and deviations of the tube-wall temperature were *** results indicated that overtemperatures occurred in the high-temperature superheater under a low *** regulating damper method caused the high-temperature secondary reheater to exceed the permissible temperature by 21.4℃.The tube-wall temperature exhibited a bimodal distribution along the *** 0% flue gas recirculation,the maximum tube-wall temperature deviation attained 13.39℃,exceeding a reasonable value by 3.39℃.The swinging burner method was the least likely to cause tube-wall temperature deviations and *** reasonable regulation ranges for swinging burners,regulating dampers,and flue gas recirculation were-20° to 7°,45% to 60%,and 8% to 24%,*** on different flexible peak shaving constraints,an appropriate temperature-regulating method was selected,and the regulation range was specified.
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