On the thermal stratification inside a spherical water storage tank during dynamic mode

Bouzaher, Mohamed Taher; Bouchahm, Nora; Guerira, Belhi; Bensaci, Charaf-Eddine; Lebbi, Mohamed

doi:10.1016/j.applthermaleng.2019.113821

Cited by 23 publications

(8 citation statements)

References 19 publications

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“…A CFD analysis of Li et al [66] showed that the higher effective discharging efficiency (about 14% in average) could be obtained with the shower-type inlet distributor compared to the simpleinlet case (flow rate ranges from 5 to 15 L min −1 ). Furthermore, the perforated plate design has been widely used as the multi-branch type distributor in the packed-bed TES systems, [20]; (c) perforated plate [67]; (d) incline flat plate [14]; (e) overflow tubular [67]; (f) moving plate [68]; (g) compoundpipe stratifier [69]; (h) porous pipe [70]; (i) perforated tube [71]. Reprinted with permission from refs.…”

Section: Flow Distributormentioning

confidence: 99%

“…The multi-branch type is usually fabricated with the multiple ports to divide the inertial-force-controlled injected flow into many minor streams [51,54,[66][67][68][69][70][71][72]. A CFD analysis of Li et al [66] showed that the higher effective discharging efficiency (about 14% in average) could be obtained with the shower-type inlet distributor compared to the simple-inlet case (flow rate ranges from 5 to 15 L min −1 ).…”

Section: Flow Distributormentioning

confidence: 99%

“…Classification and examples of flow distributor used in thermocline TES tank. (a) shower type [66]; (b) conical porous diffuser[20]; (c) perforated plate[67]; (d) incline flat plate[14]; (e) overflow tubular[67]; (f) moving plate[68]; (g) compoundpipe stratifier[69]; (h) porous pipe[70]; (i) perforated tube[71]. Reprinted with permission from refs [14,20,[67][68][69][70][71]…”

mentioning

confidence: 99%

“…(a) shower type [66]; (b) conical porous diffuser[20]; (c) perforated plate[67]; (d) incline flat plate[14]; (e) overflow tubular[67]; (f) moving plate[68]; (g) compoundpipe stratifier[69]; (h) porous pipe[70]; (i) perforated tube[71]. Reprinted with permission from refs [14,20,[67][68][69][70][71]…”

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confidence: 99%

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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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Section: Flow Distributormentioning

confidence: 99%

Section: Flow Distributormentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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

et al. 2021

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“…Without the need for experimental measurements, the CFD method can achieve a more realistic thermal stratification characterization by using high temporal and spatial resolutions. The models for CFD methods can be classified into one‐dimensional (1D) models, 2,16–20 two‐dimensional (2D) models, 21–23 and three‐dimensional (3D) models 24–32 . For the 1D models, energy balance over each control volume is conducted, thus leading to a series of coupled partial differential equations in time and vertical height 20 .…”

Section: Introductionmentioning

confidence: 99%

Surrogate modeling and optimization for the unequal diameter radial diffuser of stratified thermal energy storage tanks

Deng

Niu

et al. 2022

Energy Science & Engineering

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Stratified thermal energy storage (TES) tanks are widely used in thermal power plants to enhance the electric power peak load shifting capability and integrate high renewable energy shares. In this study, a data-driven surrogate modeling and optimization study of the unequal diameter radial diffuser previously proposed by the present authors is conducted. First, based on the orthogonal experimental design, numerical experiments are performed to generate the performance database. Then, the database is used to establish the data-driven surrogate model via the support vector machine. Subsequently, the single-objective optimization and multiobjective optimization of an unequal diameter radial diffuser are conducted using the genetic algorithm. For the single-objective optimization, the optimal thermocline thickness is 0.829 m when the diameter ratio of the long baffle and the tank is 0.426, the diameter ratio of the short baffle and the long baffle is 0.823, and the distance between the two baffles is 228.51 mm. For multiobjective optimization, the obtained Pareto optimal solutions are obtained. Under the premise of maintaining excellent thermal stratification, the selected Point C can reduce the steel cost by 88.1%. The research results are helpful for designing efficient and economical unequal diameter radial diffusers for TES tanks.

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A Review on CFD Applications in Seasonal Pit Thermal Energy Storage

Ren,

Xiao,

Ren

et al. 2024

Environmental Science and Engineering

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On the thermal stratification inside a spherical water storage tank during dynamic mode

Cited by 23 publications

References 19 publications

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

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

Surrogate modeling and optimization for the unequal diameter radial diffuser of stratified thermal energy storage tanks

A Review on CFD Applications in Seasonal Pit Thermal Energy Storage

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