压水堆核电机组热力系统损分布的矩阵算法

Matrix Algorithm for Exergy Loss Distribution in Thermal System of PWR Nuclear Power Units

基于分析法和矩阵算法,建立了压水堆核电机组热力系统的通用损分布矩阵方程,并以某900MW压水堆核电机组为例进行了计算分析,得到了额定工况下热力系统及设备的损分布规律.结果表明:反应堆的损失最大,占核能总的50.85%,其次为汽轮发电机、蒸汽发生器和凝汽器,分别占核能总的6.17%、3.2%和2.55%;矩阵方程较常规分析法具有构造简单、矩阵元素填写法则简便、物理意义明确和规律性强等优点;利用该方程便于开发出相应的计算程序,进而为核电机组节能潜力挖掘和故障诊断提供依据.

Based on exergy analysis method and matrix algorithm, a general matrix equation of exergy loss distribution in thermal system of pressurized water reactor （PWR） nuclear power units was established, with which calculation and analysis were carried out for a 900 MW PWR nuclear power unit, and subse- quently exergy loss distribution in the thermal system and relevant equipment were obtained under rated conditions. Results show that the exergy loss in nuclear reactor is the largest, accounting for 50.85% of the total nuclear exergy, followed by turbo-generator, steam generator and condenser, respectively ac- counting for 6.17%, 3.2% and 2.55%. Compared with traditional exergy analysis methods, the matrix algorithm has advantages in simple structure, convenient element filling of matrix, explicit physical mean- ings and obvious regularity. With the equation, relative calculation programs can be developed, which therefore may serve as a reference for development of energy-saving potential and for fault diagnosis in nu- clear power units.