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Numerical simulation of metal hydride based thermal energy storage system for concentrating solar power plants

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  • Bhogilla, Satya Sekhar

Abstract

Thermo-chemical based thermal energy storage systems are receiving much attention due to their higher energy density. Metal hydride based thermal energy storage (MHTES) system can store heat efficiently for the concentrating solar power (CSP) plants. MHTES systems are energy-efficient, compact, environmentally friendly and available over a wide operating temperature range. In this type of system, two reactors filled with different alloys are used to store the excess heat from the CSP plant. As the operation of the MHTES system is unsteady, to simulate its process efficiently, it is essential to study its transient heat and hydrogen transfer characteristics. A 2-D numerical model is solved for estimating the performance of the MHTES system. The fully implicit finite volume method (FVM) is used to solve the mathematical equations of the MHTES system. The alloy pair chosen for the MHTES system is Mg2Ni/TiFeMn. The numerical model is validated against the data reported in the literature. The thermal energy storage coefficient is defined as the ratio of the total useful energy output of the MHTES system to total energy supplied to the MHTES system for the proposed system. For the given operating conditions of high temperatures (TH1 = 623 K, TH2 = 573 K, and low temperatures (TL1 = 303 K, TL2 = 293 K), the achieved thermal energy storage coefficient is 0.71.

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  • Bhogilla, Satya Sekhar, 2021. "Numerical simulation of metal hydride based thermal energy storage system for concentrating solar power plants," Renewable Energy, Elsevier, vol. 172(C), pages 1013-1020.
    • Handle: RePEc:eee:renene:v:172:y:2021:i:c:p:1013-1020
    DOI: 10.1016/j.renene.2021.03.109
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    References listed on IDEAS

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    1. Feng, Penghui & Liu, Yang & Ayub, Iqra & Wu, Zhen & Yang, Fusheng & Zhang, Zaoxiao, 2019. "Techno-economic analysis of screening metal hydride pairs for a 910 MWhth thermal energy storage system," Applied Energy, Elsevier, vol. 242(C), pages 148-156.
    2. Feng, Penghui & Wu, Zhen & Zhang, Yang & Yang, Fusheng & Wang, Yuqi & Zhang, Zaoxiao, 2018. "Multi-level configuration and optimization of a thermal energy storage system using a metal hydride pair," Applied Energy, Elsevier, vol. 217(C), pages 25-36.
    3. Serge Nyallang Nyamsi & Ivan Tolj & Mykhaylo Lototskyy, 2019. "Metal Hydride Beds-Phase Change Materials: Dual Mode Thermal Energy Storage for Medium-High Temperature Industrial Waste Heat Recovery," Energies, MDPI, vol. 12(20), pages 1-27, October.
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    1. Zheng, Shuaishuai & Wang, Yuqi & Wang, Di & Guan, Sinan & Liu, Ying & Wang, Feng & Zheng, Lan & Wu, Le & Gao, Xiong & Zhang, Zaoxiao, 2023. "Design and performance study on the primary & secondary helical-tube reactor," Energy, Elsevier, vol. 263(PD).
    2. Krane, Patrick & Nash, Austin L. & Ziviani, Davide & Braun, James E. & Marconnet, Amy M. & Jain, Neera, 2022. "Dynamic modeling and control of a two-reactor metal hydride energy storage system," Applied Energy, Elsevier, vol. 325(C).
    3. Wang, Ke & Chen, Wei & Li, Lu, 2022. "Multi-field coupled modeling of metal hydride hydrogen storage: A resistance atlas for H2 absorption reaction and heat-mass transport," Renewable Energy, Elsevier, vol. 187(C), pages 1118-1129.

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