Work

Study on Reheater Tube Wall Temperature in a 1000 MW Ultra-Supercritical Unit Under Flexible Peak-Shaving Conditions

Year: 2025

Type: article

Abstract: As coal-fired power plants shift from being primary power sources to operating as flexible peak-shaving units, the reheater—a critical component of the boiler’s ‘four tubes’—has attracted significant attention. This study focuses on the tube wall temperature distributions of the reheater at different loads and measurement points, analyzing factors that contribute to its uneven heat distribution. The results indicate that the heat distribution across the tubes of the low temperature reheater (LRH) is uneven. From the left to the right side of the tube panel, the tube wall temperatures form two parabolic profiles. The tubes most susceptible to overheating are the first tube of the 91st panel and the first tube of the 181st panel. For the high-temperature reheater (HRH), at an electrical load of 217.7 MW, the maximum temperature difference is higher than that of LRH. At all other electrical loads, however, the maximum temperature difference of the HRH is lower than that of the LRH. The LRH is at a higher risk of tube rupture caused by uneven heating compared to the HRH.

Source: Processes

DOI: 10.3390/pr13113440

Authors: Liyun Yan, Jiang Pu, Jin Yan, Cai Lv

Institutions: Zhengzhou University of Light Industry, State Power Investment Corporation (China), Nanjing Institute of Technology

Language: English

Topic: Advanced Power Generation Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,896