Effects of Double-Diffusive Convection on Calculation Time and Accuracy Results of a Salt Gradient Solar Pond: Numerical Investigation and Experimental Validation

Rghif, Yassmine; Colarossi, Daniele; Principi, Paolo

doi:10.3390/su15021479

Cited by 7 publications

(3 citation statements)

References 49 publications

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“…The stability of the pond was experimentally studied to find dynamic methods of enhancing heat transport [77]. Experimental findings on the effect of double-diffusive convection on the calculation time were compared to numerical analysis with the numerical model giving more accurate thermal behaviors and a small error percentage [78]. The transient property of SGSP in the Mediterranean region has been investigated to prove that thermal energy is stored as sensible heat [79].…”

Section: Salt Gradient Solar Pond (Sgsp)mentioning

confidence: 99%

Improving the Performance of Solar Thermal Energy Storage Systems

Nkele¹,

Ikhioya²,

Chime³

et al. 2023

J Energ Power Technol

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In recent times, renewable energy resources have been greatly researched because of the increasing concern to minimize global warming and meet energy demands. Energy storage systems have become useful tools for sustainability and meeting energy needs. Solar energy has proven in recent times to be the primary and most prevalent option due to its environmental friendliness, availability, and minimal pollution. Effective utilization of available energy resources has led to developing new alternative energy devices like the solar thermal energy storage system (STESS) with a solar energy source. Solar thermal energy systems are efficient systems that utilize solar energy to produce thermal and electrical energy. This review aims to give a detailed overview of solar TESS, different TES application systems, and effective methods of increasing the system performance to provide energy during deficient times. The various classifications, basic components, the principle of operation, application areas of STESSs, prospects, and extensive reviews on these aspects have also been discussed in this review. The different factors to be considered geared towards meeting energy demands and increasing the efficiency of solar TES systems have been duly detailed. This review is a single manuscript with a detailed overview of STESS, the principle of operation and components of STESS, thermal energy storage materials, a description of different application systems, and a discussion of factors responsible for improving the system efficiency.

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Section: Salt Gradient Solar Pond (Sgsp)mentioning

confidence: 99%

Improving the Performance of Solar Thermal Energy Storage Systems

Nkele¹,

Ikhioya²,

Chime³

et al. 2023

J Energ Power Technol

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“…The salt-gradient solar pond (SGSP) is one of these systems. Rghif et al conducted extensive in-depth research to further improve the performance and efficiency of SGSP systems [2][3][4][5]. STS can effectively solve the mismatch between the supply of and demand for thermal energy in time and space, and the solar fraction and operational stability of solar-heating systems can be significantly improved.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Solar-Heating System with Solar-Tower Receiver and Seasonal Storage in Northern China: Dynamic Performance Assessment and Operation Strategy Analysis

Qiu

Wang

et al. 2023

Energies

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Solar-heating technology is a promising solution to help China achieve the “3060 double carbon” target as soon as possible. Seasonal thermal storage (STS) can effectively solve the mismatch problem of solar-heating systems between the supply and demand of thermal energy. Due to the instability of solar radiation resources and the heat demand, it is necessary to analyze the dynamic response characteristics and operation strategy optimization of the system in different operation stages. Yet, related studies are still scarce. The aim of this paper is to study the switching mechanism of the operation modes and the transitive relation of the system energy in different operation stages based on a pilot solar-heating system with STS in Huangdicheng, northern China. The impacts of different heating strategies on the system performance were also analyzed with a dynamic simulated method in TRNSYS. The results showed that the solar fraction of the system reached 89.4% in the third year, which was 3.6% higher than that in the first year. The quality–quantity heating operation strategies are effective ways to improve the discharge efficiency of the STS and the system performance without a heat pump. The electricity consumption of the pump on the heating side could be significantly reduced by 44.6% compared with the quality control. Ultimately, the findings in this paper are valuable for the optimization of the operation of solar-heating systems.

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“…4,12,35,36 Similarly, scientists have also studied the factors contributing to the decrease in efficiency of salt gradient solar ponds. [37][38][39][40][41][42][43][44] Wang et al 23 experimented to investigate the impact of varying porosity levels (61%, 65.5%, 67%, and 74%) of a porous material on salt diffusion within Salt Gradient Solar Ponds (SGSPs). The results indicated that the porous material could delay salt diffusion from the Lower Convective Zone (LCZ) to the Upper Convective Zone (UCZ), with lower porosity leading to slower diffusion.…”

Section: Introductionmentioning

confidence: 99%

Enhancing energy efficiency in trapezoidal solar ponds: A synergistic approach utilizing east-west reflector and coal cinder – An energy analysis study

Jayakumar,

Arunachalam

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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The realm of sustainable energy systems has seen the salt gradient solar pond (SGSP) emerge as an eco-friendly solution for thermal energy storage. This research explores the use of an East-West (EW) reflector and coal cinder additive (CC) to enhance the energy efficiency of the inner zones of a salt gradient trapezoidal solar pond (SGTSP). In this work, SGTSP with EW and CC systems were designed, fabricated, and analyzed based on an energy point of view and compared with standard SGTSP systems. It also provides a shading area analysis based on the slant angle of the SGSP system, offering valuable insights into the system’s performance for low-grade heat source thermal applications. The study found that the EW reflector significantly increased the average solar intensity by 33.2%. The addition of coal cinder additive raised the average temperature of the lower convection zone by 24.1%. The SGTSP with EW reflector and coal cinder (SGTSP-EWR&CC) reached a maximum average temperature of 83.85°C, with a 42% higher energy efficiency in the lower convection zone compared to the conventional SGTSP (SGTSP-C). Further, the SGTSP’s potential for thermal energy storage and providing practical strategies for enhancing its energy efficiency is showcased.

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Effects of Double-Diffusive Convection on Calculation Time and Accuracy Results of a Salt Gradient Solar Pond: Numerical Investigation and Experimental Validation

Cited by 7 publications

References 49 publications

Improving the Performance of Solar Thermal Energy Storage Systems

Improving the Performance of Solar Thermal Energy Storage Systems

Numerical Investigation of a Solar-Heating System with Solar-Tower Receiver and Seasonal Storage in Northern China: Dynamic Performance Assessment and Operation Strategy Analysis

Enhancing energy efficiency in trapezoidal solar ponds: A synergistic approach utilizing east-west reflector and coal cinder – An energy analysis study

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