Experimental and numerical study on the thermocline behavior of packed-bed storage tank with sensible fillers

Xie, Baoshan; Baudin, Nicolas; Soto, Jérôme; Fan, Yilin

doi:10.1016/j.renene.2023.03.107

Cited by 20 publications

(2 citation statements)

References 54 publications

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“…After optimization with three types of filling materials (quartzite, cast iron, and high-temperature concrete), the tank's effective energy was increased by 10.5% compared to a tank filled solely with quartzite, with a slight decrease of 2.1% in thermal efficiency. Xie et al found that heat loss has a significant impact on thermocline expansion (>20%), and good insulation can increase charging efficiency by 5-7% and the capacity ratio by 3-5% [15].…”

Section: Thermocline Heat Storage Processmentioning

confidence: 99%

“…For DMTHS tanks, Xie et al found that as the maximum operating temperature of the tank increases, charging efficiency slightly decreases due to increased heat losses, while the overall efficiency slightly increases [15]. Numerical simulation results by Nandi et al indicate that the inlet fluid temperature has no significant impact on storage efficiency [104].…”

Section: Temperaturementioning

confidence: 99%

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New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Zhang,

Guo,

Zhu

et al. 2024

Energies

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To achieve sustainable development goals and meet the demand for clean and efficient energy utilization, it is imperative to advance the penetration of renewable energy in various sectors. Energy storage systems can mitigate the intermittent issues of renewable energy and enhance the efficiency and economic viability of existing energy facilities. Among various energy storage technologies, thermocline heat storage (THS) has garnered widespread attention from researchers due to its stability and economic advantages. Currently, there are only a few review articles focusing on THS, and there is a gap in the literature regarding the optimization design of THS systems. Therefore, this paper provides a comprehensive review of the recent research progress in THS, elucidating its principles, thermal storage materials, applications, and optimization designs. The novelty of this work lies in the detailed classification and analysis of various optimization designs for THS, including tank shape, aspect ratio, inlet/outlet configuration, thermal energy storage materials arrangement, operating strategies, and numerical model optimization approaches. The limitations of existing research are also identified, and future perspectives are proposed, aiming to provide recommendations for THS research and contribute to the development and promotion of THS technology.

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Section: Thermocline Heat Storage Processmentioning

confidence: 99%

Section: Temperaturementioning

confidence: 99%

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Zhang,

Guo,

Zhu

et al. 2024

Energies

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Numerical analysis of demolition waste‐based thermal energy storage system for concentrated solar power plants

Koçak,

Paksoy

2024

Energy Storage

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Thermal energy storage (TES) is an enabling system that provides uninterrupted energy from concentrated solar power (CSP) plants. Packed‐bed TES systems have great opportunity to significantly enhance the cost‐effectiveness, efficiency, and sustainability of CSP plants by employing an affordable and sustainable packing material. The objective of this study is to design a demolition waste‐based packed bed TES system with a maximum storage capacity of 40 kWh, specifically tailored to store heat within the temperature range of 290°C to 565°C using solar salt as heat transfer fluid (HTF), thereby making it suitable for integration into CSP plants. Performance and thermal behavior of demolition waste‐based packed‐bed TES system was assessed through numerical analysis. The results demonstrate that a high discharging efficiency of 76.0% was achieved when the HTF flow rate was set at 100 kgh−1. However, it is important to note that at lower HTF flow rate, heat loss increases, leading to a decrease in discharging efficiency to 70%. The experiment also revealed a uniform thermal gradient within the packed‐bed TES system, up to a fluid flow rate of 300 kgh−1. It is worth mentioning that lower flow rates can further improve the stratification effect; however, they may also result in increased heat loss and reduced storage capacity. Based on these findings, an optimal flow rate range of 100 to 200 kgh−1 is recommended to achieve the best performance for the packed‐bed TES system.

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Experimental and numerical investigation of a solar thermocline system for domestic water heating applications

Cheema,

Javaid,

Yildizhan

et al. 2024

J Therm Anal Calorim

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Experimental and numerical study on the thermocline behavior of packed-bed storage tank with sensible fillers

Cited by 20 publications

References 54 publications

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

New Advances in Materials, Applications, and Design Optimization of Thermocline Heat Storage: Comprehensive Review

Numerical analysis of demolition waste‐based thermal energy storage system for concentrated solar power plants

Experimental and numerical investigation of a solar thermocline system for domestic water heating applications

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