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采用集中参数处理方法，把直流蒸汽发生器二次侧按流体相变分区，建立了动态热工水力模型。同时该模型在相变交界面上采用可动边界，使模型更切合实际运行工况。计算表明，用这一处理方法，既满足了一定的精度要求，又缩减了计算时间，是直流蒸汽发生器的动态仿真和进行控制特性分析十分有效的方法。
Using the centralized parameter processing method, the dynamic thermal hydraulic model was established by dividing the secondary side of the DC steam generator according to the fluid phase transition. At the same time, the model adopts the movable boundary on the phase change interface, which makes the model more suitable for the actual operating conditions. The calculation shows that this method not only meets the requirements of accuracy but also reduces the calculation time, which is a very effective method for the dynamic simulation of DC steam generator and the analysis of control characteristics.