Research of multiple refined degree simulating and modeling for high pressure feed water heat exchanger in nuclear power plant
Research of multiple refined degree simulating and modeling for high pressure feed water heat exchanger in nuclear power plant
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DOI：
10.1016/j.applthermaleng.2018.05.005
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发表时间：
2018-07
影响因子：
6.4
通讯作者：
Mei Gong;M. Peng;Haishan Zhu
中科院分区：
文献类型：
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作者：
Mei Gong;M. Peng;Haishan Zhu
高压给水换热器是核电站二回路中的重要设备。由于对HPFWHX的不同要求，在这项工作中开发了多个细化的仿真模型。仿真模型以实际的物理结构为基础，包括管束和隔板。在蒸汽冷凝区和疏水冷却区，大量的控制容积被隔板和管束分隔开。为了验证仿真模型的正确性，本文利用秦山二期核电站7号高压脉冲真空换热器的主要设计参数对仿真模型进行了验证。稳态参数适用于限制模型误差和提高其精度。选取两种动态工况对仿真模型的特性进行了验证。验证结果表明，动态过程与分析所用的理论基础是一致的。仿真模型还给出了正常运行时HPFWHX主要参数的分布和动态。该仿真模型计算速度快，可以帮助研究人员确定和分析HPFWHX的热特性。该仿真模型对类似管壳式换热器在不同工况下的仿真也有一定的参考价值。
High pressure feed water heat exchangers (HPFWHX) are essential equipments in the nuclear power plant (NPP) secondary loop. Because of the different requirements for the HPFWHX, there are the multiple degrees of refined simulation model developed in this work. The high fidelity simulation model is based on the practical physical structure with the tube bundle and partition plates. Large number of control volumes are divided by partition plates and tube bundles in the steam condensing zone and drain water cooling zone. To test and verify the simulation model, we utilized the main design parameters of No.7 HPFWHX in Qinshan II NPP. The steady state parameters are suitable for limiting model error and increasing its accuracy. Two dynamic conditions are chosen to verify the characteristics of the simulation model. Verification result shows that the dynamic processes are consistent with the theoretical basis used for the analysis. Also, the simulation model provides the parameter distribution and the dynamic state of the major HPFWHX parameters in the normal operation. The simulation model could assist researchers to determine and analyze the thermal features of the HPFWHX with fast calculation speed. The simulation model is also useful for the simulation of similar tube and shell heat exchangers in different conditions.