Background

EBSILONProfessional是一个进行电厂热力过程能量与质量平衡过程的软件。

EBSILONProfessional可实现以下系统的平衡计算

• 单个元件
• 多个元件组合
• 子系统
• 完整系统

这些元件或者系统可以是封闭系统或者开放系统的一部分。

 

EBSILONProfessional基于以下元件建立一个不间断的连续模型结构

• 标准元件，用于常规电厂的建模
• 附加元件，用于电厂中其他复杂系统的建模。

 

基于这样的建模理念，EBSILONProfessional可以对多种热力系统进行系统平衡计算，包括：

• 汽水循环，
• 燃气轮机循环，
• 联合循环

以及供热系统。

 

EBSILONProfessional使用

• IAPWS-IF97 水和水蒸汽热力性质标准，以及
• 针对空气/烟气的多项式比热容计算公式

作为物性的基准数据。

 

EBSILONProfessional is a flexible program system, with which you can balance all the power plant models with the help of a closed solution system (based on a sequential solution method). Controllers are necessary for a versatile use of this system. They are used as iteration controllers of how the components and their characteristics must be specified by the user. The iteration run is optimized by the "self-learning" properties of the controller.

Based upon this philosophy, EBSILONProfessional proves to be a very flexible system. All possible power plant systems can be balanced with the help of this system.

 

The cycle is modeled as a non-linear equations system, solved by a series of linear equation systems. The variable coefficients and the right-hand sides are formed by using the values of the preceding iteration step. The iteration ends, when the basis variable no longer change.

To accelerate the convergence, the variable right-hand sides and the coefficients are developed through the Taylor series during the entire preceding iteration step. In this way, the non-linear equations system is solved with the Newton method.

To solve a series of linear equation systems, an iteration method is used, since the matrix is filled only slightly. A Gauss-Siedel method is selected after extensive comparisons of computing time and convergence.

The user must do this essential work, before he can start with the calculation: The user must model the cycle as exactly as possible by using the available components. The rules for modeling are as follows:

Rule 1: Check whether the selected component really has the physical properties, in order to be simulated.

Rule 2: Connect the components carefully, taking into account the meaning of each connection.

Rule 3: In case none of the available components possesses the properties of the process components, it must be checked, whether another corresponding component can be used in place of this component.