Discharge effectiveness of thermal energy storage systems

Rodrigues, Fernando A.; Lemos, Marcelo J. S. de

doi:10.1016/j.applthermaleng.2022.118232

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…87 Accordingly, there needs to be a trade-off between the positive and negative effects on heat transport and fluid flow, respectively. 88,89 Effect of porosity and permeability on the overall performance of TES is discussed in detail in the review paper by Palomba and Frazzica. 90 Besides packing density, particle shape also plays an important role in determining the efficiency of TES.…”

Section: Design Criteria Of Rtes Systemsmentioning

confidence: 99%

“…It should be noted, however, that although this is not favorable in terms of fluid flow performance, this lower permeability and higher pressure drop is usually accompanied by a thinner thermocline (the layer where there is a sharp temperature gradient between the hot and cold fluid) and a better thermal performance due to the better heat exchange between the HTF and porous media 87 . Accordingly, there needs to be a trade‐off between the positive and negative effects on heat transport and fluid flow, respectively 88,89 . Effect of porosity and permeability on the overall performance of TES is discussed in detail in the review paper by Palomba and Frazzica 90 .…”

Section: Rtes Systemsmentioning

confidence: 99%

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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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