Coupled model for prediction of water wall tube temperature of supercritical boiler

YAN Jingwen; LIU Xin; HUANG Shuyi; YUE Lin; LI Chi; LI Xinying; WEI Jia; FU Jing; LI Wenjia; WANG Heyang

doi:10.19666/j.rlfd.202109179

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Coupled model for prediction of water wall tube temperature of supercritical boiler

更新时间：2025-09-28

- Coupled model for prediction of water wall tube temperature of supercritical boiler
- Thermal Power Generation Vol. 51, Issue 1, Pages: 100-108(2022)
- 作者机构：
  
  1. 天津大学机械工程学院
  2. 烟台龙源电力技术股份有限公司
  3. 国家能源集团乐东发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202109179
  CLC： TM621.2
- Published：2022
- 稿件说明：
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YAN Jingwen, LIU Xin, HUANG Shuyi, et al. Coupled model for prediction of water wall tube temperature of supercritical boiler[J]. Thermal power generation, 2022, 51(1): 100-108.
DOI：

YAN Jingwen, LIU Xin, HUANG Shuyi, et al. Coupled model for prediction of water wall tube temperature of supercritical boiler[J]. Thermal power generation, 2022, 51(1): 100-108. DOI： 10.19666/j.rlfd.202109179.

摘要

近年来可再生能源发电的迅速增长和低氮燃烧技术的广泛应用

加剧了燃煤锅炉水冷壁的超温和高温腐蚀趋势

导致爆管事故频发。预防水冷壁爆管需掌握不同锅炉运行参数下水冷壁的管壁温度分布

为此提出了一种锅炉烟气侧三维计算流体动力学模型与工质侧一维水动力模型耦合的传热计算模型

通过二模型间壁面热流密度和管内工质温度的数据交互

将烟气侧传热和管内工质温度对管壁温度的关键影响同时考虑在计算中

实现了水冷壁壁温分布的精确预测。采用此耦合模型对某超临界350 MW机组螺旋管圈水冷壁的工质温度与管壁温度分布特性进行数值模拟研究

水冷壁出口壁温预测结果与测量结果符合良好

验证了模型的准确性。

Abstract

With the quick increase of renewable energy power generation and extensive application of low NOx combustion technologies

the overheating and high temperature corrosion of water wall of coal-fired boilers dramatically aggravated

leading to frequent tube leak accidents. In order to prevent these accidents

it is critical to master the tube wall temperature distribution characteristics of the boiler with different operating parameters. For this reason

a coupled heat transfer model that integrates the three-dimensional CFD model of the gas side of boiler with the one-dimensional hydrodynamic model of the steam side was proposed. The coupled heat transfer calculation between the gas and steam sides of boiler was realized through the data exchange of wall heat flux and steam temperature between the two models. In this way

the crucial effects of gas side heat transfer and steam temperature on the tube temperature were both considered in the calculation

and thereby

realizing the accurate prediction of temperature distribution of water wall tubes. This coupled model was used to simulate the distributions of the steam and wall tube temperature of the spiral water wall of a 350 MW supercritical boiler. The predicted results of the tube temperatures at the outlet of the spiral wall were in good agreement with the measured values verifying the accuracy of the model

indicating the accuracy of the model.

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