Economic research on parameter improvement of main steam and reheat steam in double reheat ultra-supercritical units
LI Zheng
LI Zhefei
YANG Liqiang
TANG Yi
ZHANG Xinye
LIANG Jianjian
DONG Chaoyuan
ZHOU Yuanzhi
Abstract：Increasing the reheating times of the unit and adopting higher steam parameters are effective methods to improve the energy utilization efficiency of coal-fired power plants.Through the research on the different main steam and reheat steam parameters adopted in the Kemen Phase Ⅲ project,the economic comparison of different main steam and reheat steam parameter improvement schemes is conducted.The economic changes of the project after the improvement of main steam and reheat steam parameters under different coal prices and utilization hours are obtained,and suggestions are provided for the parameter selection of subsequent secondary reheat units.The results show that through technical and economic comparison,the appropriate main steam parameters for the Kemen Phase Ⅲ project are as follows,main steam pressure of 32 MPa,main steam temperature of 600℃,primary reheating temperature of 623℃,and secondary reheating temperature of 620℃.The lower the coal price,the lower the utilization hours,and the longer the static payback period for the improvement of main steam parameters.For projects with high coal prices and high utilization hours,improving the main steam parameters is more beneficial to the project's economic efficiency.
Keywords：double reheat ultra-supercritical unitmain steam parametersreheat steam parameterseconomic analysisstatic investment
Publication Date：2025-12-25
Online Publishing Date：2026-01-26(First online date of this platform, not the publication date of the document)
Pages：6( 126-131 )