IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v212y2020ics0360544220317503.html
   My bibliography  Save this article

Effect of pebble diameters on the heat transfer characteristics of a structured pebble bed in an HTGR

Author

Listed:
  • Chen, Leisheng
  • Lee, Jaeyoung

Abstract

Investigation on the positions of hot spots appearing in an operating pebble-bed of a high temperature gas-cooled reactor (HTGR) and seeking ways to reduce the possibility of their appearance have attracted scientists’ attention. Improving the convective heat transfer coefficient (HTC) of the bed could reinforce heat transferring and thus lower the temperature of the pebbles. In our previous studies, heat transfer characteristics of a face-centered-cubic (FCC) structured pebble-bed (pebble diameter of 12 cm) were discussed. In this study, 3 FCC beds were packed with pebbles of 3 different diameters (10 cm, 12 cm, and 14 cm) and the impact of pebble diameter on the heat transfer coefficient was firstly investigated; then, a small sphere was placed in the pebble-bed packed with 10 cm-diameter pebbles and how the sphere size affecting the heat transfer characteristics was studied. It was found that (1) reducing the pebble diameter improved the heat transfer performances, specifically, the bed with a pebble diameter of 10 cm demonstrated the best heat transfer ability and an enhancement ratio of 10.4% was obtained compared to the bed with 12 cm-pebbles; (2) the average HTC of the bed increased with the inserted sphere size, particularly, comparing to the pebble-bed without a small sphere, 27% enhancement was achieved for the bed packed with 10 cm-pebbles and a 4.14 cm-sphere; (3) A generic correlation of the Nusselt number was proposed as Nu = 0.1941Re0.8Pr0.4-0.3226(L/D-1.027)2Re0.8Pr0.4. Such findings provide references for reactor designers and will help to develop a safer pebble-bed core.

Suggested Citation

  • Chen, Leisheng & Lee, Jaeyoung, 2020. "Effect of pebble diameters on the heat transfer characteristics of a structured pebble bed in an HTGR," Energy, Elsevier, vol. 212(C).
  • Handle: RePEc:eee:energy:v:212:y:2020:i:c:s0360544220317503
    DOI: 10.1016/j.energy.2020.118642
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544220317503
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.energy.2020.118642?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Esence, Thibaut & Desrues, Tristan & Fourmigué, Jean-François & Cwicklinski, Grégory & Bruch, Arnaud & Stutz, Benoit, 2019. "Experimental study and numerical modelling of high temperature gas/solid packed-bed heat storage systems," Energy, Elsevier, vol. 180(C), pages 61-78.
    2. Hu, Yingxue & Yang, Jian & Wang, Jingyu & Wang, Qiuwang, 2018. "Investigation of hydrodynamic and heat transfer performances in grille-sphere composite pebble beds with DEM-CFD-Taguchi method," Energy, Elsevier, vol. 155(C), pages 909-920.
    3. Al-Shannaq, Refat & Young, Brent & Farid, Mohammed, 2019. "Cold energy storage in a packed bed of novel graphite/PCM composite spheres," Energy, Elsevier, vol. 171(C), pages 296-305.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Zhang, Kai & Du, Shiqi & Sun, Peng & Zheng, Bin & Liu, Yongqi & Shen, Yingkai & Chang, RunZe & Han, Xiaobiao, 2021. "The effect of particle arrangement on the direct heat extraction of regular packed bed with numerical simulation," Energy, Elsevier, vol. 225(C).
    2. Li, Chuan & Li, Qi & Ding, Yulong, 2019. "Investigation on the thermal performance of a high temperature packed bed thermal energy storage system containing carbonate salt based composite phase change materials," Applied Energy, Elsevier, vol. 247(C), pages 374-388.
    3. Tian, Shen & Yang, Qifan & Hui, Na & Bai, Haozhi & Shao, Shuangquan & Liu, Shengchun, 2020. "Discharging process and performance of a portable cold thermal energy storage panel driven by embedded heat pipes," Energy, Elsevier, vol. 205(C).
    4. Sathishkumar, A. & Cheralathan, M., 2023. "Charging and discharging processes of low capacity nano-PCM based cool thermal energy storage system: An experimental study," Energy, Elsevier, vol. 263(PB).
    5. Liu, Zichu & Quan, Zhenhua & Zhao, Yaohua & Jing, Heran & Wang, Lincheng & Liu, Xin, 2022. "Numerical research on the solidification heat transfer characteristics of ice thermal storage device based on a compact multichannel flat tube-closed rectangular fin heat exchanger," Energy, Elsevier, vol. 239(PD).
    6. Vannerem, S. & Neveu, P. & Falcoz, Q., 2023. "Thermal cycle performance of thermocline storage: numerical and experimental exergy analysis," Energy, Elsevier, vol. 278(C).
    7. Zhang, Chunwei & Yu, Meng & Fan, Yubin & Zhang, Xuejun & Zhao, Yang & Qiu, Limin, 2020. "Numerical study on heat transfer enhancement of PCM using three combined methods based on heat pipe," Energy, Elsevier, vol. 195(C).
    8. Kothari, Rohit & Hemmingsen, Casper Schytte & Voigt, Niels Vinther & La Seta, Angelo & Nielsen, Kenny Krogh & Desai, Nishith B. & Vijayan, Akhil & Haglind, Fredrik, 2024. "Numerical and experimental analysis of instability in high temperature packed-bed rock thermal energy storage systems," Applied Energy, Elsevier, vol. 358(C).
    9. Safari, Vahid & Kamkari, Babak & Hooman, Kamel & Khodadadi, J.M., 2022. "Sensitivity analysis of design parameters for melting process of lauric acid in the vertically and horizontally oriented rectangular thermal storage units," Energy, Elsevier, vol. 255(C).
    10. Pei Cai & Youxue Jiang & He Wang & Liangyu Wu & Peng Cao & Yulong Zhang & Feng Yao, 2020. "Numerical Simulation on the Influence of the Longitudinal Fins on the Enhancement of a Shell-and-Tube Ice Storage Device," Sustainability, MDPI, vol. 12(6), pages 1-14, March.
    11. Ding, Zhixiong & Wu, Wei & Leung, Michael, 2021. "Advanced/hybrid thermal energy storage technology: material, cycle, system and perspective," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).
    12. Tiwari, Vipul Kumar & Kumar, Alok & Kumar, Arvind, 2019. "Enhancing ice slurry generation by using inclined cavity for subzero cold thermal energy storage: Simulation, experiment and performance analysis," Energy, Elsevier, vol. 183(C), pages 398-414.
    13. Wang, Bo & Jia, Xiaoyu & Yang, Jian & Wang, Qiuwang, 2022. "Numerical study on temperature rise and structure optimization for a three-phase gas insulated switchgear busbar chamber," Energy, Elsevier, vol. 254(PC).
    14. ELSihy, ELSaeed Saad & Cai, Changrui & Li, Zhenpeng & Du, Xiaoze & Wang, Zuyuan, 2024. "Performance investigation on the cascaded packed bed thermal energy storage system with encapsulated nano-enhanced phase change materials for high-temperature applications," Energy, Elsevier, vol. 293(C).
    15. Calderón-Vásquez, Ignacio & Cortés, Eduardo & García, Jesús & Segovia, Valentina & Caroca, Alejandro & Sarmiento, Cristóbal & Barraza, Rodrigo & Cardemil, José M., 2021. "Review on modeling approaches for packed-bed thermal storage systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    16. Jawaad A. Ansari & Refat Al-Shannaq & Jamal Kurdi & Shaheen A. Al-Muhtaseb & Charles A. Ikutegbe & Mohammed M. Farid, 2021. "A Rapid Method for Low Temperature Microencapsulation of Phase Change Materials (PCMs) Using a Coiled Tube Ultraviolet Reactor," Energies, MDPI, vol. 14(23), pages 1-19, November.
    17. Xu, Chengyuan & Yan, Xiaopeng & Kang, Yili & You, Lijun & You, Zhenjiang & Zhang, Hao & Zhang, Jingyi, 2019. "Friction coefficient: A significant parameter for lost circulation control and material selection in naturally fractured reservoir," Energy, Elsevier, vol. 174(C), pages 1012-1025.
    18. Yao, Haichen & Liu, Xianglei & Li, Jiawei & Luo, Qingyang & Tian, Yang & Xuan, Yimin, 2023. "Chloroplast-granum inspired phase change capsules accelerate energy storage of packed-bed thermal energy storage system," Energy, Elsevier, vol. 284(C).
    19. Lin, Niangzhi & Li, Chuanchang & Zhang, Dongyao & Li, Yaxi & Chen, Jian, 2022. "Emerging phase change cold storage materials derived from sodium sulfate decahydrate," Energy, Elsevier, vol. 245(C).
    20. Zeng, Ziya & Zhao, Bingchen & Wang, Ruzhu, 2023. "High-power-density packed-bed thermal energy storage using form-stable expanded graphite-based phase change composite," Renewable and Sustainable Energy Reviews, Elsevier, vol. 182(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:212:y:2020:i:c:s0360544220317503. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.