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为进行复杂能量系统的热经济学分析和评价,找出提高核电机组热经济性的新途径,基于火用经济学理论和矩阵算法,建立了压水堆核电机组热力系统火用成本分析通用模型。以某900 MW压水堆核电机组热力系统为例,进行了39股火用流的单位火用成本计算及分析,并对具体设备提出了明确的优化改进措施。结果表明:沿热力循环方向,各股火用流的单位火用成本先增加后减小;凝汽器输出火用流的单位火用成本最高,为7.1754,其次是凝结水泵和1号低压加热器,分别为5.249和4.1911。矩阵算法较常规火用成本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;利用矩阵算法的易编程性,便于开发出相应的计算及分析软件,进而为核电机组热力系统优化及故障诊断奠定理论基础。
In order to analyze and evaluate the thermal economics of complex energy system and find new ways to improve the thermal economy of nuclear power plant, based on the theory of exergy economy and the matrix algorithm, a general model of exergy cost analysis of nuclear power plant PWR . Taking a 900 MW PWR nuclear power plant thermal system as an example, the calculation and analysis of unit exergy cost of 39 strands of flue gas flow were carried out, and specific optimization measures were put forward for the specific equipment. The results show that unit unit cost per unit of flame flow increases first and then decreases along the direction of thermal cycling. The unit cost of unit output of condenser is 7.1754, followed by condensate pump and low pressure heating Device, respectively 5.249 and 4.1911. The matrix algorithm has the advantages of simple structure, simple matrix element filling method, clear physical meaning and regularity as compared with conventional fire cost analysis method. It is easy to develop the calculation and analysis software by using the math algorithm of matrix algorithm, Unit thermal system optimization and fault diagnosis laid the theoretical foundation.