【摘要】 为规范编制生产结构图提供依据,简化链式微分法则?成本建模方法,分离导致单位产品?成本增大的不同影响因素,提出了基于?流属性分类的热力系统?成本建模及计算方法.给出基于?流属性分类法生产结构图生成规则,将生产过程中不同类型?流进行归类,按照热力系统?流属性分类构建虚拟组元以及生产组元与虚拟组元连接关系原则,结合生产结构图定义了3类建模准则,根据生产组元的输入输出?流属性分类将生产组元分为4类,构造热力系统单位?成本的迭代算法.算法可有效避免高维模型的推导误差,计算结果分析显示,相同属性的?流拥有相同的?成本,随着热力系统生产过程的递进,不同属性的?流?成本逐渐增大,相邻的不同属性?流?成本差值为该生产过程本身的热力学损失,可分离不同属性?流?成本的成因,给出不同属性?流?成本之间的交互关系.仿真计算表明,在保持较高仿真精度的基础上,仿真耗时由3 s下降为1 s.更多还原

【Abstract】 To provide a basis for standardizing the production structure diagram,simplifying the chain differential rule exergy cost modeling method, separating the different influencing factors leading to the increase of the unit product exergy cost, an improved exergy cost modeling and its calculation method for thermal systems were proposed. The rules to generate the production structure diagram based on exergy flow attribute classification method were given different types of exergy flow in production process were classified. The the principle of constructing virtual component and the relationship between the production component and the virtual component was proposed in accordance with classification of exergy flow attributes, three kinds of modeling criteria were defined based on the production structure diagram, the attributes of input and output rake flow were classified to divide the production components into four categories, and an iteration algorithm for the unit exergy cost of the thermal system was constructed. The algorithm could effectively avoid the error of the high-dimensional model. The analysis of calculation results shows that the same attributes of the exergy have the same exergy costs. With the progress of the thermal system production process, the costs of different attributes of the exergy increase gradually. The difference value of the exergy cost between adjacent different attributes of the exergy flow is the thermodynamic loss of the production process. The calculation results can distinguish the causes of exergy costs of different attributes, and give the interaction between exergy costs of different attributes. The simulation results show that the simulation time-consuming decreases from 3 to 1 s on the basis of maintaining high simulation accuracy.更多还原