多排管式相变蓄热器熔化过程热性能数值模拟研究  

Numerical Simulation on Thermal Performance of Multiple-pipe Heat Storage

作　　者：崔海亭[1] 张改[1] 蒋静智[1] 

机构地区：[1]河北科技大学,河北石家庄050018

出　　处：《流体机械》2014年第4期56-61,共6页Fluid Machinery

基　　金：河北省自然科学基金项目(E2014208005);河北省教育厅科学研究计划重点项目(ZH2012079);石家庄市科技局科学研究与发展计划项目(12124423A)

摘　　要：建立了多排管相变蓄热器的物理模型和数学模型,利用计算流体力学软件FLUENT对多排管蓄热器内填充石蜡和石蜡/膨胀石墨复合材料时的熔化过程进行了数值模拟,分析了多排管蓄热器内填充两种相变材料时蓄放热过程中温度场的分布情况、相界面移动规律等。模拟结果证明膨胀石墨的添加和多排管结构不仅缩短了蓄热器的蓄放热时间,而且使温度场的分布更加均匀合理,对蓄热装置的设计及实验研究提供了重要的参考价值。The mathematicul model and physicul model of simulation object are established based on the theoretical anulysis of latchet heat storage. Then using FLUENT software for numerical simulation and processing the results, the temperature field distribution during the heat storage is analyzed in multitube regenerator filled with pure paraffin and paraffin/expanded graphite （EG） composite. The simulation results show that the addition of EG not only reduces the heating time, but makes the temperature field distribution more uniform and reasonable in heat accumulator. Through numerical simulation research on multitube heat storage, valuable references are provided for the design and optimization of phase change heat storage in the future.

关 键 词：多排管 相变蓄热 石蜡 膨胀石墨 数值模拟 

分 类 号：TH12[机械工程—机械设计及理论] TK02[动力工程及工程热物理]