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Investigation on Melting Process of Finned Thermal Energy Storage with Rotational Actuation

Author

Listed:
  • Yi Liu

    (Xi’an Aeronautics Computing Technique Research Institute, AVIC, Xi’an 710068, China)

  • Xiankun Meng

    (Xi’an Aeronautics Computing Technique Research Institute, AVIC, Xi’an 710068, China)

  • Xuanzhi Lv

    (Xi’an Aeronautics Computing Technique Research Institute, AVIC, Xi’an 710068, China)

  • Junfei Guo

    (Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Xiaohu Yang

    (Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

Phase-change thermal storage is essential for renewable energy utilization, addressing spatiotemporal energy transfer imbalances. However, enhancing heat transfer in pure phase-change materials (PCMs) has been challenging due to their low thermal conductivity. Rotational actuation, as an active method, improves heat transfer and storage efficiency. This study numerically examined the melting behavior of finned thermal storage units at various rotational speeds. The influence of speed was analyzed via melting time, rate, phase interface, temperature, and flow distribution. Results showed that rotational speed effects were non-monotonic: excessive speeds may hinder complete melting or reduce efficiency. There existed an optimal speed for the fastest melting rate and a limited speed range for complete melting. At the preferred rotation speed of 2.296 rad·s −1 , the utilization of PCMs in a finned tube could mitigate the risk of local overheating by 97.2% compared to a static tube, while improving heat storage efficiency by 204.9%.

Suggested Citation

  • Yi Liu & Xiankun Meng & Xuanzhi Lv & Junfei Guo & Xiaohu Yang, 2024. "Investigation on Melting Process of Finned Thermal Energy Storage with Rotational Actuation," Energies, MDPI, vol. 17(17), pages 1-19, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4209-:d:1462394
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    References listed on IDEAS

    as
    1. Soares, N. & Matias, T. & Durães, L. & Simões, P.N. & Costa, J.J., 2023. "Thermophysical characterization of paraffin-based PCMs for low temperature thermal energy storage applications for buildings," Energy, Elsevier, vol. 269(C).
    2. Fateh Mebarek-Oudina & Ines Chabani, 2023. "Review on Nano Enhanced PCMs: Insight on nePCM Application in Thermal Management/Storage Systems," Energies, MDPI, vol. 16(3), pages 1-21, January.
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