Thermodynamic Analysis of Packed Bed Thermal Energy Storage System

被引：0

作者：

GUO Huan ^{[1
]}

XU Yujie ^{[1
,2
]}

GUO Cong ^{[1
]}

CHEN Haisheng ^{[1
,2
]}

WANG Yifei ^{[1
]}

YANG Zheng ^{[1
]}

HUANG Ye ^{[3
]}

DOU Binlin ^{[4
]}

机构：

[1] Institute of Engineering Thermophysics, Chinese Academy of Sciences

[2] University of Chinese Academy of Sciences

[3] School of the Built Environment, University of Ulster

[4] School of Energy and Power Engineering, University of Shanghai for Science and Technology

来源：

Journal of Thermal Science | 2020年 / 29卷 / 02期

关键词：

packed bed thermal energy storage; thermocline; steady; thermodynamic analysis; stable operation;

D O I：

暂无

中图分类号：

TK11 [热能];

学科分类号：

080702 ;

摘要：

A packed-bed thermal energy storage(PBTES) device, which is simultaneously restricted by thermal storage capacity and outlet temperatures of both cold and hot heat transfer fluids, is characterized by an unstable operation condition, and its calculation is complicated. To solve this problem, a steady thermodynamics model of PBTES with fixed temperatures on both ends was built. By using this model, the exergy destruction, thermocline thickness, thermal storage capacity, thermal storage time, and other key parameters can be calculated in a simple way. In addition, the model explained the internal reason for the change of thermocline thickness during thermal storage and release processes. Furthermore, the stable operation of the PBTES device was analyzed, and it was found that higher inlet temperature of hot air, and lower temperature difference between cold and hot air can produce less exergy destruction and achieve a larger cycle number of stable operation. The work can be employed as the basis of the design and engineering application of PBTES.

引用

页码：445 / 456

页数：12

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