Thermodynamic analysis of packed bed thermal energy storage system

Huan Guo, Yujie Xu, Cong Guo, Haisheng Chen, Yifei Wang, Zheng Yang, Y Huang, Binlin Dou

Research output: Contribution to journalArticle

Abstract

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 is 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 explains the internal reason for the change of thermocline thickness during thermal storage and release processes. Furthermore, the stable operation of the PBTES device is analyzed, and it is 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.
LanguageEnglish
Pages1-15
Number of pages15
JournalJournal of Thermal Science
Publication statusAccepted/In press - 3 Jan 2019

Fingerprint

Packed beds
Thermal energy
Energy storage
Thermodynamics
Exergy
Temperature distribution
Temperature
Air
Specific heat
Heat transfer
Fluids
Hot Temperature

Keywords

  • packed bed thermal energy storage
  • thermocline
  • steady
  • thermaldynamic analysis
  • stable operation

Cite this

Guo, H., Xu, Y., Guo, C., Chen, H., Wang, Y., Yang, Z., ... Dou, B. (Accepted/In press). Thermodynamic analysis of packed bed thermal energy storage system. Journal of Thermal Science, 1-15.
Guo, Huan ; Xu, Yujie ; Guo, Cong ; Chen, Haisheng ; Wang, Yifei ; Yang, Zheng ; Huang, Y ; Dou, Binlin. / Thermodynamic analysis of packed bed thermal energy storage system. In: Journal of Thermal Science. 2019 ; pp. 1-15.
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abstract = "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 is 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 explains the internal reason for the change of thermocline thickness during thermal storage and release processes. Furthermore, the stable operation of the PBTES device is analyzed, and it is 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.",
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Guo, H, Xu, Y, Guo, C, Chen, H, Wang, Y, Yang, Z, Huang, Y & Dou, B 2019, 'Thermodynamic analysis of packed bed thermal energy storage system', Journal of Thermal Science, pp. 1-15.

Thermodynamic analysis of packed bed thermal energy storage system. / Guo, Huan; Xu, Yujie; Guo, Cong; Chen, Haisheng; Wang, Yifei; Yang, Zheng; Huang, Y; Dou, Binlin.

In: Journal of Thermal Science, 03.01.2019, p. 1-15.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermodynamic analysis of packed bed thermal energy storage system

AU - Guo, Huan

AU - Xu, Yujie

AU - Guo, Cong

AU - Chen, Haisheng

AU - Wang, Yifei

AU - Yang, Zheng

AU - Huang, Y

AU - Dou, Binlin

N1 - Was waiting on information from author and was off on bereavement leave and missed the deadline on acceptance. An exception to be added that it was validated within three months of publication

PY - 2019/1/3

Y1 - 2019/1/3

N2 - 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 is 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 explains the internal reason for the change of thermocline thickness during thermal storage and release processes. Furthermore, the stable operation of the PBTES device is analyzed, and it is 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.

AB - 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 is 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 explains the internal reason for the change of thermocline thickness during thermal storage and release processes. Furthermore, the stable operation of the PBTES device is analyzed, and it is 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.

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KW - thermaldynamic analysis

KW - stable operation

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Guo H, Xu Y, Guo C, Chen H, Wang Y, Yang Z et al. Thermodynamic analysis of packed bed thermal energy storage system. Journal of Thermal Science. 2019 Jan 3;1-15.