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Numerical Investigation on a Packed-Bed LHTES System Integrated into a Micro Electrical and Thermal Grid

Author

Listed:
  • Vittorio Tola

    (Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy)

  • Simone Arena

    (Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy)

  • Mario Cascetta

    (Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy)

  • Giorgio Cau

    (Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy)

Abstract

Currently, energy storage systems are considered a key solution when mismatch occurs between energy supply and demand, allowing a more efficient energy deployment and use. The present paper is focused on the study of a latent heat thermal energy storage (LHTES) system based on a packed bed of encapsulated phase change material (PCM) of spherical shape, conceived as an auxiliary component of a micro-grid to be built in a Research Center located in southwestern Sardinia (Italy). The main purpose of this work was to perform numerical simulations for predicting the performance of the TES system, designed to store the surplus thermal energy produced during the weekend by a heat pump fed by a photovoltaic (PV) plant. The stored energy would then be utilized during the weekdays to integrate the air-conditioning system supply. The numerical simulations were based on a one-dimensional (1-D) two-equation transient model, able to return the thermocline profile of the water and the PCM separately. The behavior of the LHTES device during charge and discharge phases was reproduced, as well as during the standby periods. Finally, two characteristic indexes of the PV system were evaluated, to investigate the effect of TES on grid interchanges, self-consumption, and self-sufficiency.

Suggested Citation

  • Vittorio Tola & Simone Arena & Mario Cascetta & Giorgio Cau, 2020. "Numerical Investigation on a Packed-Bed LHTES System Integrated into a Micro Electrical and Thermal Grid," Energies, MDPI, vol. 13(8), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:8:p:2018-:d:347343
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    References listed on IDEAS

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    1. Mario Cascetta & Fabio Serra & Simone Arena & Efisio Casti & Giorgio Cau & Pierpaolo Puddu, 2016. "Experimental and Numerical Research Activity on a Packed Bed TES System," Energies, MDPI, vol. 9(9), pages 1-13, September.
    2. Li, Xiao-Yan & Yang, Liu & Wang, Xue-Lei & Miao, Xin-Yue & Yao, Yu & Qiang, Qiu-Qiu, 2018. "Investigation on the charging process of a multi-PCM latent heat thermal energy storage unit for use in conventional air-conditioning systems," Energy, Elsevier, vol. 150(C), pages 591-600.
    3. Galione, P.A. & Pérez-Segarra, C.D. & Rodríguez, I. & Oliva, A. & Rigola, J., 2015. "Multi-layered solid-PCM thermocline thermal storage concept for CSP plants. Numerical analysis and perspectives," Applied Energy, Elsevier, vol. 142(C), pages 337-351.
    4. Allouche, Yosr & Varga, Szabolcs & Bouden, Chiheb & Oliveira, Armando C., 2017. "Dynamic simulation of an integrated solar-driven ejector based air conditioning system with PCM cold storage," Applied Energy, Elsevier, vol. 190(C), pages 600-611.
    5. Cheng, Xiwen & Zhai, Xiaoqiang, 2018. "Thermal performance analysis and optimization of a cascaded packed bed cool thermal energy storage unit using multiple phase change materials," Applied Energy, Elsevier, vol. 215(C), pages 566-576.
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    7. Kutlu, Cagri & Zhang, Yanan & Elmer, Theo & Su, Yuehong & Riffat, Saffa, 2020. "A simulation study on performance improvement of solar assisted heat pump hot water system by novel controllable crystallization of supercooled PCMs," Renewable Energy, Elsevier, vol. 152(C), pages 601-612.
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    Cited by:

    1. Lana Migla & Raimonds Bogdanovics & Kristina Lebedeva, 2023. "Performance Improvement of a Solar-Assisted Absorption Cooling System Integrated with Latent Heat Thermal Energy Storage," Energies, MDPI, vol. 16(14), pages 1-12, July.
    2. Robert Sekret & Przemysław Starzec, 2021. "Developing a Cold Accumulator with a Capsule Bed Containing Water as a Phase-Change Material," Energies, MDPI, vol. 14(9), pages 1-18, May.

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