Experimental investigation on single-medium stratified thermal energy storage system

Advaith, S.; Parida, Dipti Ranjan; Aswathi, K.T.; Dani, Nikhil; Chetia, Utpal Kumar; Chattopadhyay, K.; Basu, Saptarshi

doi:10.1016/j.renene.2020.09.092

Cited by 19 publications

(8 citation statements)

References 20 publications

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“…During charging, the injection of thermal jets causes entrainment phenomena [10], resulting in convective heat transfer and fluid dynamic perturbations [11], leading to thermocline decay. Obtaining piston flow and the flattened thermocline shape during In the literature, different methods define the thermocline zone, including the percentage of the maximum temperature difference in the fluid [8], absolute value of the temperature difference [9], or based on the magnitude of the temperature gradient.…”

Section: Thermocline Heat Storage Processmentioning

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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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%

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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“…The evolution of temperature gradient against time or height serves as the general evaluation of thermocline behavior which is one of the most common manners [34]. Nevertheless, the observation of temperature gradient is not convenient to compare the thermal performance among different TES tanks.…”

Section: Category #2mentioning

confidence: 99%

A Review on the Performance Indicators and Influencing Factors for the Thermocline Thermal Energy Storage Systems

et al. 2021

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Thermal energy storage (TES) system plays an essential role in the utilization and exploitation of renewable energy sources. Over the last two decades, single-tank thermocline technology has received much attention due to its high cost-effectiveness compared to the conventional two-tank storage systems. The present paper focuses on clarifying the performance indicators and the effects of different influencing factors for the thermocline TES systems. We collect the various performance indicators used in the existing literature, and classify them into three categories: (1) ones directly reflecting the quantity or quality of the stored thermal energy; (2) ones describing the thermal stratification level of the hot and cold regions; (3) ones characterizing the thermo-hydrodynamic features within the thermocline tanks. The detailed analyses on these three categories of indicators are conducted. Moreover, the relevant influencing factors, including injecting flow rate of heat transfer fluid, working temperature, flow distributor, and inlet/outlet location, are discussed systematically. The comprehensive summary, detailed analyses and comparison provided by this work will be an important reference for the future study of thermocline TES systems.

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“…Without the buffering effect of solid fillers, the fluid mixing region could occupy a large volume of the SMT tank, sometimes even the whole tank under high flow rate condition [14]. Given the fact that SMT storage tanks are commonly employed for the space heating and cooling of both individual buildings and districts/communities due to their volume compactness, simple construction and easy maintenance [15], researches have been devoted to study the impacts of flow injection on the stability of thermocline evolution and to propose measures to mitigate the performance degradation.…”

Section: Introductionmentioning

confidence: 99%

“…Shaikh et al [36] showed the enlarged thermocline thickness at a larger ∆T, despite the reduced penetration distance of the entering jet. Moreover, Advaith et al [15] revealed that the influence of ∆T could also be related to the ambient temperature of the storage tank due to the inevitable heat loss.…”

Section: Introductionmentioning

confidence: 99%

Optimized flow distributor for stabilized thermal stratification in a single-medium thermocline storage tank: A numerical and experimental study

Lou

Xie

Aubril

et al. 2023

Energy

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Experimental investigation on single-medium stratified thermal energy storage system

Cited by 19 publications

References 20 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

A Review on the Performance Indicators and Influencing Factors for the Thermocline Thermal Energy Storage Systems

Optimized flow distributor for stabilized thermal stratification in a single-medium thermocline storage tank: A numerical and experimental study

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