基于移动边界法的超临界流体换热器动态模型  

Dynamic Model of Supercritical Fluid Heat Exchanger Based on Moving Boundary Method

作　　者：马小峰 姜培学[1] 祝银海[1] MA Xiaofeng;JIANG Peixue;ZHU Yinhai(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Beijing Key Laboratory of CO2 Utilization and Reduction Technology,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]热科学与动力工程教育部重点实验室,清华大学能源与动力工程系,北京100084

出　　处：《工程热物理学报》2022年第10期2603-2611,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学项目(No.51922060)。

摘　　要：本文建立了一种基于移动边界法的超临界介质的换热器动态仿真模型,并提出了全新的控制体划分方法。仿真测试结果表明新模型的稳定性和完整性良好。同时对模型进行了实验验证,结果表明换热段出口温度的误差范围为±1.5 K,相对误差为±3%。本模型与常规的有限体积法模型相比具有精度高和仿真速度快的优势,为超临界换热器的动态仿真提供了新的建模方法。A dynamic simulation model of supercritical medium heat exchanger based on moving boundary method is proposed in this paper and a novel control volume separation method is developed. The simulation test results showed that the integrity and stability of the model is satisfying. An experimental study was conducted to verify the model. The maximum absolute error of the steady-state outlet temperature under different pressures is ±1.5 K, and the relative error is±3%. Compared with conventional finite volume model, the proposed model has the advantages of high accuracy and efficiency, which provides a new modelling method for the dynamic simulation of supercritical heat exchanger.

关 键 词：超临界 移动边界法 动态仿真 

分 类 号：TK123[动力工程及工程热物理—工程热物理]