Numerical simulation analysis of heat transfer characteristics of membrane water-cooled wall in supercritical boiler
WANG Jingyuan
HUANG Jian
NING Xinyu
LI Songshan
WU Yong
Abstract：A numerical simulation study is conducted on the heat transfer characteristics of the membrane water-cooled wall of a certain supercritical boiler.A numerical model of the membrane water-cooled wall section is established to explore the influence laws of different test conditions and different flame temperatures on the key wall temperature on the backfire side of the water-cooled wall.The results show that the temperature at the center of the fin on the backfire side can reflect the wall temperature of the water-cooled tube on the backfire side to a certain extent,while the center temperature of the tube wall on the backfire side can basically represent the temperature of the working medium inside the tube.When the flame temperature on the fire-facing side of the water-cooled wall rises from 950℃to 1 450℃,the weld position at the center temperature of the fin on the backfire side is more sensitive to the change of the flame temperature on the fire-facing side.By inferring the temperature distribution of the fire-facing side wall through the backfire side wall temperature distribution,the combustion conditions in the furnace can be grasped,providing a reference for the safe,stable and efficient operation of the unit under different load conditions and energy-saving diagnosis of the boiler.
Keywords：membrane water-cooled wallheat transfer characteristicsbackfire sidewall temperature distributionnumerical simulation
Publication Date：2025-09-25
Online Publishing Date：2025-11-10(First online date of this platform, not the publication date of the document)
Pages：5( 83-87 )