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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (2): 276-281.DOI: 10.19912/j.0254-0096.tynxb.2020-0260

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空气-沙子移动床换热器传热特性实验研究

杨建蒙1, 孙源敏1, 侯党员1, 李斌1, 孟繁旭1, 陈海生2   

  1. 1.华北电力大学能源动力与机械工程学院,保定 071003;
    2.中国科学院工程热物理研究所,北京 100190
  • 收稿日期:2020-03-25 出版日期:2022-02-28 发布日期:2022-08-28
  • 通讯作者: 李斌(1969—),男,博士、副教授,主要从事电站热力系统性能分析及节能优化方面的研究。libin@ncepu.edu.cn

EXPERIMENTAL STUDY ON HEAT TRANSFER CHARACTERISTICS OF AIR-SAND MOVING BED HEAT EXCHANGER

Yang Jianmeng1, Sun Yuanmin1, Hou Dangyuan1, Li Bin1, Meng Fanxu1, Chen Haisheng2   

  1. 1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China;
    2. Institute of Engineering Thermophysics, CAS, Beijing 100190, China
  • Received:2020-03-25 Online:2022-02-28 Published:2022-08-28

摘要: 面向太阳能热发电系统,建立一种空气-沙子移动床换热器实验平台,对其在不同参数下进行传热性能的实验研究。并基于实验数据,利用线性回归拟合得到表观气固传热系数的关联式,其整个实验工况预测值与实验值的平均误差为3.57%。研究结果表明:较高雷诺数可提升空气-沙子移动床换热器的传热效能,空气进口温度为281 ℃时,空气-沙子移动床换热器的固相传热效能可达93.56%。当沙子流量不变时,沙子粒径的变化并不会大幅度影响空气-沙子移动床换热器的换热效果。

关键词: 太阳能热发电, 空气-沙子, 移动床换热器, 传热效能, 影响因素, 实验研究

Abstract: An experimental platform of air- sand moving bed heat exchanger is established for solar thermal power generation system and the heat transfer performance of air - sand moving bed heat exchanger under different parameters was studied experimentally. Based on the experimental data, the correlation formula of gas-solid heat transfer coefficient is obtained by using linear regression fitting, and the average error between the predicted value and the experimental value of the whole experimental condition is 3.57%. The results show that the higher Reynolds number can improve the heat transfer effectiveness of air-sand moving bed heat exchanger, When the air inlet temperature is 281 ℃, the heat transfer effectiveness of air-sand moving bed heat exchanger can reach 93.56%. When the flow rate of sand is constant, the change of sand particle size will not greatly affect the heat transfer effect of air-sand moving bed heat exchanger.

Key words: solar thermal power generation, air-sand, moving bed heat exchanger, heat transfer effectiveness, influence factors, experimental study

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