Experimental Study on Energy Storage Characteristics of Sintered Ore Particle Packed Beds

  • LAI Zhenya ,
  • DING Liwei ,
  • LYU Hongkun ,
  • HOU Chenglong ,
  • CHEN Jiaying ,
  • GUO Xutao ,
  • HAN Gaoyan ,
  • ZHANG Kang
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  • 1. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China
    2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

网络出版日期: 2025-01-09

基金资助

This work is supported by the Science and Technology Project of State Grid Corporation of China (Grant No. 5400-202419199A-1-1-ZN).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Experimental Study on Energy Storage Characteristics of Sintered Ore Particle Packed Beds

  • LAI Zhenya ,
  • DING Liwei ,
  • LYU Hongkun ,
  • HOU Chenglong ,
  • CHEN Jiaying ,
  • GUO Xutao ,
  • HAN Gaoyan ,
  • ZHANG Kang
Expand
  • 1. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China
    2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Online published: 2025-01-09

Supported by

This work is supported by the Science and Technology Project of State Grid Corporation of China (Grant No. 5400-202419199A-1-1-ZN).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

摘要

颗粒填充床储能系统具有成本低、储能温度区间广等优点,可以与太阳能热发电系统相结合,解决可再生能源固有的波动性和不连续性。开发低成本、储能性能优异的新材料是储能领域永恒的研究热点之一。本文创新性地使用烧结矿石颗粒作为储能材料,通过储热实验研究了颗粒尺寸对填充床的气流阻力特性、储能特性和温跃层演化特性的影响。结果表明,对于宏观尺度上的颗粒,颗粒越小,床层的绝对渗透率越低,气流阻力越大。颗粒较小的填充床具有更大的比表面积、更大的体积质量和更小的床层空隙率。因此,颗粒较小的填充床具有更好的温跃层特性,不可逆损失较小,在储热循环中可以实现更高的热效率和更高的㶲效率。2540 mm、1625 mm和1016 mm颗粒填充床的循环热效率分别为53.58%、56.27%和57.60%,循环㶲效率分别为61.81%、69.25%和74.13%。此外,本文还研究了释热流量对储热性能的影响。实验结果表明,应根据不同的热需求选择合适的释热策略。

本文引用格式

LAI Zhenya , DING Liwei , LYU Hongkun , HOU Chenglong , CHEN Jiaying , GUO Xutao , HAN Gaoyan , ZHANG Kang . Experimental Study on Energy Storage Characteristics of Sintered Ore Particle Packed Beds[J]. 热科学学报, 2025 , 34(1) : 242 -253 . DOI: 10.1007/s11630-024-2079-9

Abstract

The particle packed bed energy storage system has advantages such as low costs and wide temperature ranges, which can be combined with solar thermal power generation systems to solve the inherent volatility and discontinuity of renewable energy. Developing new materials with low costs and excellent storage performances is one of the eternal research hotspots in the field of energy storage. This paper innovatively uses sintered ore particles as energy storage material and studies the effect of particle size on the airflow resistance characteristics, energy storage characteristics, and thermocline evolution characteristics of the packed bed through thermal energy storage experiments. The results indicate that for the particles in the macro scale, the smaller the particle, the lower the absolute permeability of the bed and the greater the airflow resistance. The packed bed with smaller particles has a larger specific surface area, larger bulk mass, and smaller bed voidage. Therefore, the packed beds with smaller particles have better thermocline characteristics, less irreversible loss, and can achieve higher thermal efficiency and higher exergy efficiency in the heat storage cycle. The cycle thermal efficiency in packed beds with 25–40 mm, 16–25 mm, and 10–16 mm particles is 53.58%, 56.27%, and 57.60%, respectively, and the cycle exergy efficiency is 61.81%, 69.25%, and 74.13%, respectively. Moreover, this paper also studies the effect of discharging airflow rates on thermal storage performance. The experimental results indicate that suitable discharging strategies should be selected based on different heat demands.

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