工业园区综合能源系统蒸汽混合建模仿真研究

Simulation study on steam hybrid modeling of integrated energy system in industrial parks

针对目前工业园区综合能源系统中蒸汽建模缺乏动态建模与分析以及求解时采用数值法需要在精度和计算效率间平衡的问题,基于蒸汽流动基本方程,建立蒸汽流动过程的水力热力过程数学模型。通过解析与数值混合的方法进行水力热力建模,并采用有限差分法求解热力模型。将该方法与商业仿真软件仿真数据相比:求解误差在0.43%左右,同时探究了不同求解条件对于热力过程的影响;发现空间步长增大会使温度曲线的波动性增加;随着管道内径增大,温度传递变慢,模型响应速度下降;初始压力对模型的求解过程和精度并无太大影响。

In view of the current lack of dynamic modeling and analysis of steam modeling in the integrated energy system of industrial parks,the numerical method needs to balance between accuracy and computational efficiency.Based on the basic equation of steam flow,this paper establishes a mathematical model of the hydrothermal process of steam flow.Hydrothermal model is carried out by using a mixture of analytical and numerical methods,and the thermal model is solved by finite difference method for simulation.Compared with the simulation data of commercial simulation software,the solution error of this method is about 0.43%,and the influence of different solution conditions on the thermal process is explored.It was found that an increase in spatial step size would increase the volatility of the temperature curve.As the inner diameter of the pipeline increases,the temperature transfer slows down and the response speed of the model decreases;The initial pressure does not have a significant impact on the solving process and accuracy of the model.