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Thermo-economic evaluation of PCM layer thickness change on the performance of the hybrid heat storage tank for concentrating solar power plants

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  • Elfeky, Karem Elsayed
  • Mohammed, Abubakar Gambo
  • Wang, Qiuwang

Abstract

The current research examines how increasing the thickness of the phase change material (PCM) layer impacts the thermal and economic behavior of the hybrid sensible-latent heat storage reservoir utilized in solar power plants in order to prevent temperature fluctuations at the end of discharge cycles. On the basis of two-phase dispersion-concentric equations, a detailed transient numerical analysis is developed. The mathematical model equations are computed using the MATLAB program, and the present numerical findings are validated. Numerical investigations are used to compare the proposed storage system to the sensible heat storage (SHS) system in the context of cost and efficiency. The impact of various performance evaluation indexes, including axial temperature allocation, thermocline layer degradation, charging time, discharging time, and overall efficiency, are investigated. The results showed that the (35% PCM-30% SHS-35% PCM) configuration possesses the most considerable thermocline thickness of 7.94 m at the charge period of 360 min, while the SHS case has 3.2 m thermocline thickness at the charge period of 420 min. Due to its optimized efficiency, reduced thermocline area, and comparatively low cost, the (15% PCM-70% SHS-15% PCM) configuration demonstrates a more viable choice among the considered cases.

Suggested Citation

  • Elfeky, Karem Elsayed & Mohammed, Abubakar Gambo & Wang, Qiuwang, 2022. "Thermo-economic evaluation of PCM layer thickness change on the performance of the hybrid heat storage tank for concentrating solar power plants," Energy, Elsevier, vol. 253(C).
  • Handle: RePEc:eee:energy:v:253:y:2022:i:c:s0360544222010313
    DOI: 10.1016/j.energy.2022.124128
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    Cited by:

    1. Amine Allouhi, 2023. "Latent Thermal Energy Storage for Solar Industrial Drying Applications," Sustainability, MDPI, vol. 15(17), pages 1-18, September.
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    3. Vannerem, S. & Neveu, P. & Falcoz, Q., 2023. "Thermal cycle performance of thermocline storage: numerical and experimental exergy analysis," Energy, Elsevier, vol. 278(C).
    4. Mao, Qianjun & Cao, Wenlong, 2023. "Effect of variable capsule size on energy storage performances in a high-temperature three-layered packed bed system," Energy, Elsevier, vol. 273(C).
    5. Shao, Y.L. & Soh, K.Y. & Islam, M.R. & Chua, K.J., 2023. "Thermal, exergy and economic analysis of a cascaded packed-bed tank with multiple phase change materials for district cooling system," Energy, Elsevier, vol. 268(C).
    6. Michał Musiał & Lech Lichołai & Dušan Katunský, 2023. "Modern Thermal Energy Storage Systems Dedicated to Autonomous Buildings," Energies, MDPI, vol. 16(11), pages 1-28, May.
    7. Elfeky, Karem Elsayed & Mohammed, Abubakar Gambo & Ahmed, Naveed & Wang, Qiuwang, 2023. "Thermo-mechanical investigation of the multi-layer thermocline tank for parabolic trough power plants," Energy, Elsevier, vol. 268(C).
    8. Boroojerdian, Ashkan & Nemati, H. & Selahi, Ehsan, 2023. "Direct and non-contact measurement of liquid fraction in unconstrained encapsulated PCM melting," Energy, Elsevier, vol. 284(C).

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