Research on high and low pressure bypass combined heating mode for 350 MW supercritical units
XU Mobei
WANG Li
FU Teng
GAO Jilu
ZENG Guang
Abstract：The thermal performance calculation and simulation software is adopted to calculate the thermal characteristics of the 2×350 MW supercritical units after the cylinder cutting transformation,and to analyze the current heating capacity of the units.Considering the heat demand after the company increases the heating area by 900 m2,a technical scheme for the high and low pressure bypass heating transformation of the steam turbine is proposed.The thermoelectric characteristics of the transformed unit are studied,and the economic efficiency of the transformed project is analyzed and evaluated.The results show that the transformed unit operates in a combined high and low pressure bypass cylinder cutting mode,which can meet the heating load demand after the increase in the heating area,and the change in coal consumption for power generation of the unit is relatively small.Through financial analysis and evaluation of aspects such as project investment,fuel cost,heating price,and peak shaving benefits,after the optimization and transformation of the heating mode of the unit,the project's profitability is relatively considerable.
Keywords：supercritical unithigh and low voltage bypasscylinder cuttingeconomy
Publication Date：2025-06-25
Online Publishing Date：2025-09-01(First online date of this platform, not the publication date of the document)
Pages：5( 32-36 )