储能科学与技术 ›› 2017, Vol. 6 ›› Issue (4): 708-718.doi: 10.12028/j.issn.2095-4239.2017.0083

• 相变储能专刊 • 上一篇    下一篇

堆积床储冷系统循环性能分析

金  翼1,王  乐1,杨岑玉1,宋  洁1,徐  超2   

  1. 1全球能源互联网研究院,北京 102200;2华北电力大学能源动力与机械工程学院,北京102206
  • 收稿日期:2017-05-10 修回日期:2017-06-08 出版日期:2017-07-01 发布日期:2017-07-01
  • 通讯作者: 金翼(1980—),男,博士,高级工程师,研究方向为储热(冷)技术及其应用,E-mail:jin.yi@139.com。
  • 基金资助:
    国家自然科学优秀青年基金(51522602)项目,国网科技项目(SGRI-DL-71-16-017)

Cycle performance of a packed bed based cold storage device

JIN Yi1, WANG Le1, YANG Cenyu1, SONG Jie1, XU Chao2   

  1. 1Global Energy Interconnection Research Institute, Beijing 102200, China; 2 School of Energy, Power and Mechanical Engineering, China North China Electric Power University, Beijing 102206, China
  • Received:2017-05-10 Revised:2017-06-08 Online:2017-07-01 Published:2017-07-01

摘要: 液态空气储能技术是一种新型的压缩空气储能技术,由于具有储能密度高等优点具有较好的应用前景。储冷系统是液态空气储能技术的核心装置,其性能对于整体储能系统的效率及可靠性至关重要。本文针对固体颗粒堆积床储冷系统,采用数值模拟方法,研究了储冷系统在连续储/释冷循环过程中的运行性能和效率特性。发现完全储/释冷循环具有较低的循环效率,因此在储能系统运行时需要采用带有截止温度的部分储/释冷循环;在循环若干次后可以达到可重复循环状态,此时释冷效率接近100%,而堆积床高度、填充颗粒直径、储/释冷过程截止温度等对储冷效率尤其是有效容量比具有重要影响。由于堆积床储冷系统的有效容量比较低,为满足一定的储冷容量需求,设计时必须依据有效容量比对理论储冷容量进行放大。

关键词: 液态空气储能, 堆积床储冷, 效率, 循环性能

Abstract: We studied numerically a packed bed based cold energy storage device—A key component of liquid air energy storage (LAES) system and could play an important role in the system efficiency enhancement of LAES. Both the charging and discharging performance and associated efficiency were studied. Low cycle efficiency is found when the packed bed was fully charged/discharged in the first few cycles; suggesting that the outlet air temperature should be controlled with a cut-off point for each cycle. The packed bed based cold storage device approaches steady state after a number of cycles, with the charge/discharge processes repeatable, indicating the cold utilization efficiency of ~100% could be achieved. We also examined the effects of bed height, packed particle size and the cut-off point temperature on the performance. The results showed very low effective storage volume ratio. This should be considered when the storage device is scaled up.

Key words: liquid air energy storage, pellet bed for cold storage, efficiency, cycle performance