Modeling the influences of a phase change material and the Dufour effect on thermal performance of a salt gradient solar pond

Rghif, Yassmine; Zeghmati, Belkacem; Bahraoui, Fatima

doi:10.1016/j.ijthermalsci.2021.106979

Cited by 26 publications

(9 citation statements)

References 43 publications

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Section: Proposed Methodologymentioning

confidence: 99%

“…The amount of heat lost via conduction from the pond to the ground is dependent on the thermal conductivity, specific heat, and density of the soil [43,44]. The thermal conductivity (kg) was measured from the given equations by [29] as follows: k g ¼ 0:14423ð0:9 log o À 0:2Þ 10 0:000624 pgd for clay and silt soils ð2:1AÞ k g ¼ 0:14423ð0:7 log o þ 0:4Þ 10 0:000624 pgd for sand soils ð2:2BÞ…”

Section: Data Collectionmentioning

confidence: 99%

“…In this case, the system generated power is estimated of 95.67 MJ year -1 m -2 with an energy efficiency of 3.28%. Rghif et al [ 29 ] conducted a numerical investigation on the Dufour effect and the effects of a layer of Phase Change Material (PCM) on the thermal efficiency of an SGSP. Heat and Mass Transfers are described by the Navier-Stokes, thermal energy and diffusion equations which are solved with a finite volume scheme and the Gauss method.…”

Section: Introductionmentioning

confidence: 99%

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Design and performance analysis of salinity gradient solar pond under different climatic and soil conditions

et al. 2023

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A salinity gradient solar pond (SGSP) is capable of storing a significant quantity of heat for an extended period of time. It is a great option for providing hot water at a reduced energy cost. Additionally, SGSP is used in low-temperature industrial applications such as saltwater desalination, space heating, and power generation. Solar pond thermal performance is dependent on a variety of operational variables, including the soil conditions, the climate of the particular site, the thickness of the solar pond layers, the depth of the water table, and the salt content of the pond. As such, this study examines the thermal performance of a solar pond under a variety of operational conditions. The solar pond model is used to test the thermal performance by simulating two-dimensional heat and mass transport equations. The equations are solved using the finite difference technique utilizing MATLAB® scripts. Salt distributions and temperature profiles are computed for a variety of factors influencing SGSP’s thermal performance. The main distinguishing variables influencing the thermal performance of SGSP are soil conditions, such as soil texture, types, the moisture level in soil, and water table depth. The final findings indicated that the fine sand dry soil performed better than the other soil types owing to its poor heat conductivity. The economic results indicated that the period of return (POR) of the intended system is around 2 years. The solar pond construction costs such as excavation, transportation, salt and lining, were considered based on the local prices. This modeled study extracted the greatest possible energy is 110W/m2, with the fine sand dry at 62.48°C lowest temperature. This study suggested that the climatic conditions of Lahore is better than climatic conditions of Islamabad. Additionally, deeper water tables are suggested for improved thermal performance of the pond.

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Section: Proposed Methodologymentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and performance analysis of salinity gradient solar pond under different climatic and soil conditions

et al. 2023

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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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“…For such systems, the latent heat absorbed in the phase change material (PCM) is often used for heat storage at a relatively constant temperature [3,4]. The application and development prospects of PCMs in different solar systems include solar thermal power plants [5,6], solar water heaters [7,8], solar air heaters [9,10], and building heating and cooling sector [11,12]. Paraffin wax, as a typical organic solid-liquid PCM, offers good stability, no corrosiveness and supercooling, high latent heat density, and small density variation during phase change.…”

Section: Introductionmentioning

confidence: 99%

Design and assessments on a hybrid pin fin-metal foam structure towards enhancing melting heat transfer: An experimental study

Liu

Xiao

et al. 2022

International Journal of Thermal Sciences

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Modeling the influences of a phase change material and the Dufour effect on thermal performance of a salt gradient solar pond

Cited by 26 publications

References 43 publications

Design and performance analysis of salinity gradient solar pond under different climatic and soil conditions

Design and performance analysis of salinity gradient solar pond under different climatic and soil conditions

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

Design and assessments on a hybrid pin fin-metal foam structure towards enhancing melting heat transfer: An experimental study

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