Experimental study on storage performance of packed bed solar thermal energy storage system using sintered ore particles

Lai, Zhenyu; Zhou, Hao; Zhou, Mingxi; Lv, Laiquan; Meng, Hanxiao; Cen, Kefa

doi:10.1016/j.solmat.2022.111654

Cited by 19 publications

(1 citation statement)

References 38 publications

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“…The use of various materials for both low-and high-grade TES systems can be found in the work of Gautam and Saini. 103 For medium-grade applications (temperatures between 100°C and 400°C), concrete bricks and bauxite are generally suggested thanks to their availability and affordability, 47,104 whereas for higher temperature storage (above 400°C), materials such as recycled ceramics, 105 honeycomb ceramic, 106 cast steel, 107 siliceous rocks, 108 basalt rocks, 109 basalt glasses, 110 sintered ore, 111 various concrete based materials [112][113][114] (including a mixture of concrete with phase change material 25 ), fine-grained materials (such as silica sand, quartz gravel, and basalt), 115 basalt fiber, 116 refractory blocks, 47 firebrick resistance material, 117 industrial wastes, 118 demolition waste based sensible heat materials (mainly composed of CaO, SiO 2 , and Fe 2 O 3 ), 119 and industrial by-product materials (from the potash industry) 120 are suggested. A recent study compared the energy recovery efficiency (the ratio of the heat released during discharging to the total energy consumption in a complete storage cycle) of various solid materials used in a packedbed TES, 121 and highlighted the suitability of sintered ore particles as the storage material at temperatures above 600°C.…”

Section: Use Of Different Storage Materials In Rtes Systemsmentioning

confidence: 99%

Progress on rock thermal energy storage (RTES): A state of the art review

Amiri

Ermagan

Kurnia

et al. 2023

Energy Science & Engineering

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Thermal energy is one of the most widely encountered energy forms in our daily life. To ensure efficient utilization and conversion of this energy, the balance between supply and demand needs to be maintained. For this purpose, thermal energy storage is required. There are various thermal energy storage systems available; one of the most basic is sensible thermal energy storage which includes rock thermal energy storage (RTES). This rock‐based energy storage has recently gained significant attention due to its capability to hold large amounts of thermal energy, relatively simple storage mechanism and low cost of storage medium. Accordingly, numerous studies have been conducted to elucidate the basic flow and heat transfer mechanism and to evaluate the performance of this energy storage. The major technical challenges hindering the wide adoption of this technology are the enormous pressure drop across the storage and nonoptimal heat transfer from the heat transfer fluid to the storage medium and vice versa. These issues will directly and indirectly affect the overall cost (capital, operational, and maintenance costs) of the system. To eliminate this issue and assist further development of this technology, it is crucial to compile and extract important findings from these previous studies, identify the challenge and research gap, and draw guidelines for the upcoming research and development. At the moment, this kind of compilation does not exist. Hence, this paper is prepared with the primary objective to comprehensively review the current technology and development of RTES and to propose a potential way forward based on the pain point identified. Discussion on the nontechnical aspect such as policy and regulations as well as community awareness will also be outlined and discussed.

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Section: Use Of Different Storage Materials In Rtes Systemsmentioning

confidence: 99%

Progress on rock thermal energy storage (RTES): A state of the art review

Amiri

Ermagan

Kurnia

et al. 2023

Energy Science & Engineering

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Numerical and experimental studies of packed bed thermal energy storage system based on a novel transient energy model

Ma¹,

Fan

Shao

et al. 2022

Energy Science & Engineering

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Packed bed thermal energy storage (PBTES) is an essential means to solve the temporal difference and continuity between energy supply and utilization in the fields of concentrating solar power, compressed‐air energy storage, and waste heat recovery. In this paper, to solve the imperfection and inaccuracy of the current energy model, a precise transient two‐dimensional multiequation model is developed. The model comprehensively considers thermal dispersion, wall effects, thermophysical property changes, and other factors. Experiments are performed to compare and validate the simulation results, and the simulation error is −4.5% to 1.9%, achieving excellent simulation accuracy. Also, the wall effect on the PBTES is observed, and the gas‐solid temperature fields exhibit an evident nonuniform oscillation distribution in the radial direction. The effects of storage tank length, thermophysical properties, particle diameter, and gas‐solid initial temperature on the heat release rate are discussed in detail. Results indicated that decreasing the tank length, increasing the gas‐solid temperature difference, and particle materials with high thermal diffusivities can increase the heat release rate, and a clear linear change was found. Particularly because a larger range of particle diameter variation is considered, the heat release rate is shown to vary nonlinearly with particle diameter, and the selection of the optimal diameter must comprehensively consider the effects of the heat capacity and the heat transfer rate. This study provides a theoretical basis for the design of thermal energy storage systems.

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