热力发电2024，Vol.53Issue(12)：39-48,10.DOI:10.19666/j.rlfd.202406146
5MW超临界二氧化碳循环发电机组锅炉建模与动态特性分析
Modeling and dynamic characteristic analysis for boiler in a 5 MW supercritical carbon dioxide cycle power unit
摘要
Abstract
Enhancing peak shaving capability of supercritical carbon dioxide(S-CO2)boiler is the key to realize flexible operation of S-CO2 coal-fired power plants.Research on dynamic characteristics of S-CO2 boiler is beneficial to optimize the boiler operation control strategies.A dynamic simulation model of S-CO2 boiler is established by the principles of thermodynamics and heat transfer based on the boiler of a 5 MW S-CO2 cycle power unit designed and built by Xi'an Thermal Power Research Institute,and the reliability of the model is validated with operational data from unit.Based on the simulation model,dynamic characteristics of the above S-CO2 boiler under step disturbance of different boundary conditions,such as fuel flow rate,working fluid flow rate,and working fluid temperature,are analyzed.The results show that,the S-CO2 boiler has large thermal inertia,stability times of working fluid temperature at the boiler outlet are different under disturbance of different boundary conditions.With the increase of disturbance range of boundary conditions,stability times become longer.With the increase of boiler heat load,the working fluid pressure at the S-CO2 boiler outlet decreases,and the working fluid flow rate at the S-CO2 boiler outlet increases instantaneously in the initial stages of a dynamic process.关键词
超临界二氧化碳锅炉/仿真模型/动态特性/边界条件Key words
supercritical carbon dioxide boiler/simulation model/dynamic characteristics/boundary condition引用本文复制引用
乔永强,王生鹏,白文刚,张一帆,张旭伟,李红智,杨玉,顾正萌,姚明宇..5MW超临界二氧化碳循环发电机组锅炉建模与动态特性分析[J].热力发电,2024,53(12):39-48,10.基金项目
国家重点研发计划项目(2023YFB4104400)National Key Research and Development Program of China(2023YFB4104400) （2023YFB4104400）
