A universal model for thermal hydrodynamic performance calculation for steam generation system

ZHANG Wei; CHEN Kai; WANG Huan; FAN Qiang; CHE Defu

English

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A universal model for thermal hydrodynamic performance calculation for steam generation system

Thermal Power Generation Vol. 45, Issue 4, Pages: 13-18(2016)

更新时间：2025-09-28

- A universal model for thermal hydrodynamic performance calculation for steam generation system
- 作者机构：
  
  1. 西安交通大学动力工程多相流国家重点实验室
  2. 西安建筑科技大学环境与市政工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： O352
- Published：2016
- 稿件说明：
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ZHANG Wei, CHEN Kai, WANG Huan, et al. A universal model for thermal hydrodynamic performance calculation for steam generation system[J]. Thermal Power Generation, 2016, 45(4): 13-18.
DOI：

ZHANG Wei, CHEN Kai, WANG Huan, et al. A universal model for thermal hydrodynamic performance calculation for steam generation system[J]. Thermal Power Generation, 2016, 45(4): 13-18. DOI：

摘要

提出了一种用于蒸汽发生系统水动力特性数值分析的通用模型。该模型类比于直流电路系统

以目标部件为计算对象

基于质量、动量、能量三大守恒定律和压降基本计算公式

推导和求解部件压力方程组

最终得到在不同热流密度分布和宽广压力范围的复杂网络系统中单根管内流体的流量、压力、焓值等参数。应用该模型对亚临界300 MW机组自然循环锅炉和Shell气化炉2个典型蒸汽发生系统进行了水动力计算

验证了模型的正确性。该模型对于具有复杂管网和不同热流密度分布的蒸汽发生系统

在不同压力范围内均可进行水动力特性计算

所得流体参数可用于受热面金属壁温的计算和传热恶化潜在危险的评估。

Abstract

An universal model for numerical analysis on thermal hydrodynamic performance of steam generation system was proposed.Being in analogy with direct-current circuit and taking target components as research objects

this model was built based on the conservation laws of mass

momentum

energy and basic formulas of the pressure-flow-rate relationship.Considering the mass balance of a single component

the pressures of the target components were derived through solving the pressure equations

then the mass flow rate was updated using the calculated pressure values.Taking the water wall system in a typical300 MW subcritical natural circulation power plant boiler and the steam generation system in a Shell gasifier

the accuracy of the above model has been evaluated.On this basis

taking account of the complex networks and various heat flux profiles of the steam generation system

this model is allowed an accurate analysis on the thermal hydrodynamic performance at the steam pressure from subcritical to supercritical conditions.The temperature of heating surface and the potential risks related to heat transfer deterioration can be calculated and assessed

respectively.

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