蒸汽发生系统水动力特性计算通用模型

发布时间：2018-01-09 04:16

本文关键词：蒸汽发生系统水动力特性计算通用模型　出处：《热力发电》2016年04期 　论文类型：期刊论文

【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]:A general model for numerical analysis of hydrodynamic characteristics of steam generating system is presented. The model is analogous to the DC circuit system and takes the target components as the calculation object based on mass and momentum. The three conservation laws of energy and the basic formula of pressure drop are derived and solved. Finally, the flow rate of fluid in a single pipe in a complex network system with different heat flux distribution and wide pressure range is obtained. The hydrodynamic calculation of two typical steam generation systems of natural circulation boiler and Shell gasifier of subcritical 300MW unit has been carried out by using the model, such as pressure, enthalpy and so on. This model can be used to calculate the hydrodynamic characteristics of steam generating systems with complex pipe networks and different heat flux distributions in different pressure range. The obtained fluid parameters can be used to calculate the wall temperature of metal on heating surface and to evaluate the potential hazard of heat transfer deterioration.
【作者单位】：西安交通大学动力工程多相流国家重点实验室;西安建筑科技大学环境与市政工程学院;
【基金】：国家科技支撑计划资助项目(2012BAA12B02) 中国科学院战略性先导科技专项(A类)资助项目(XDA07030100)
【分类号】：O352
【正文快照】： ZHANG Wei 1,CHEN Kai 1,WANG Huan2,FAN Qiang1,CHE Defu1(1.State Key Laboratory of Multiphase Flow for Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;2.School of Environment and Municipal Engineering,Xi'an University of Architecture and Tec

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