Numerical Modeling of Solar Ponds

Giestas, Margarida Canedo; Milhazes, Jorge P.; Pina, H.

doi:10.1016/j.egypro.2014.10.250

Cited by 18 publications

(6 citation statements)

References 25 publications

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“…This study demonstrated that the pond's efficiency depends on the salt gradient's stability in the middle non-convecting zone. Giestas et al (2014) presented a numerical model using Computational Fluid Dynamics (CFD) to represent the dynamics of a SGSP. This model is based on the Navier-Stokes equations for incompressible fluids and linked with two advection-diffusion equations.…”

Section: Modeling Of Solar Pondsmentioning

confidence: 99%

Advances in solar pond technology and prospects of efficiency improvement methods

Mbelu,

Adeyinka,

Yahya

et al. 2024

Sustainable Energy res.

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The rising global energy demand necessitates innovative solutions for harnessing renewable energy sources. Solar ponds have received attention as they present a viable means to address this challenge by absorbing and storing solar radiation. This article provides a comprehensive review of solar pond technology, including its principles, applications, heat extraction mechanisms, and approaches to optimize performance, with special attention to the salt-gradient solar pond. Additionally, the article identifies challenges that currently hinder the large-scale adoption of solar pond technology and offers recommendations for future research. By providing a detailed analysis of the current trends and future research directions, this paper seeks to contribute to the ongoing efforts to improve these systems, exploring various approaches to increase their efficiency and make them more economical and environmentally sustainable.

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Section: Modeling Of Solar Pondsmentioning

confidence: 99%

Advances in solar pond technology and prospects of efficiency improvement methods

Mbelu,

Adeyinka,

Yahya

et al. 2024

Sustainable Energy res.

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“…Bernad et al [30] developed a simulation tool for predicting solar pond performance and validated the results with experimental data obtained from operating a pilot plant in Martorell during 2009-2011. Giestas et al [31] presented a numerical model for predicting dynamics of the solar pond in terms of velocity, pressure, temperature, and salt concentration using Navier-Stokes equation for an incompressible fluid and one-advection diffusion equations for temperature and salt concentration. Monjezi and Campbell [32] developed a comprehensive model of the solar pond to predict temperature distribution of solar pond under Mediterranean conditions.…”

Section: Mathematical Modelmentioning

confidence: 99%

Thermal analysis of a mini solar pond of small surface area while extracting heat from lower convective layer

Shah¹,

Arshad²,

Khosa³

et al. 2017

THERM SCI

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Solar energy is major renewable energy resource which can potentially fulfill 100% energy demand of the world while releasing no polluting agents to the atmosphere in contrast to the conventional fossil fuels. However, due to its intermittent nature, solar energy requires effective storage of energy for utilizing during the night and cloudy weather. A solar pond is a promising solution because it has its own energy storage which is suitable for low temperature application like building heating and cooling. This paper presents a thermal analysis of a salt gradient solar pond while extracting heat from the lower convective zone. A mathematical model of surface area is developed. Efficiency analysis is performed numerically using a MATLAB code for steady temperature difference of 30 °C as well as 20 °C across the gradient layer for three different pond sizes of depths 1.5 m, 1.0 m, and 0.5 m. The thermal efficiency of first pond of 1.5 m depth varies from around 21% in summer to 11% in winter. Thermal efficiency of solar pond drops significantly by reducing its size and non-convective zone thickness. Annual average efficiencies are 21%, 19%, and 9.5% for the three ponds of 1.5 m, 1.0 m, and 0.5 m depths, respectively. So it is recommended to prefer a pond of 1.5 m over others. However, the efficiency of smaller the pond can be significantly improved by compromising on quality the of thermal energy, efficiency of 0.5 m pond rises to 17% when operating at temperature just 20 °C above ambient, compared with 9.5% for 30 °C above ambient. Solar pond therefore proves to be suitable for effectively utilizing solar energy and can present an effective solution for low temperature energy needs like space heating.

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“…One of the alternatives is to build a solar pond to absorb and store solar energy so that it can be used indefinitely. 5 The heat recovery from the ground below solar ponds was investigated by Ganguly et al 6 According to their result, the amount of heat recovered from the ground could be of significant quantity and this result is the same to that of the heat extracted from the lower convective zone (LCZ). According to a numerical study, 7 thermal storage time reduces by 47.5%, when conjugation of heat transfer between phase change material (PCM) and heat transfer fluid within the novel and efficient frustum-shaped thermal storage unit was compared with the traditional shell-and-tube unit with a single PCM.…”

Section: Introductionmentioning

confidence: 99%

Comparative energy storage study on solar pond with PCM coupled with different Nano particles

Poyyamozhi

Karthikeyan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Non-conventional energy is one of the clean energy resources. In this, solar energy is plentiful and contains high exergy among non-conventional energy sources. Thermal energy storage is a method of storing thermal energy by heating a storage material that may subsequently be used for heating or power generating. This study focused on the development of solar ponds for effective solar energy storage. The study depicts the heat fluctuation in a solar pond with phase change material and Nanomaterial. Paraffin wax was used as a phase change material and the performance has been investigated and compared with the addition of nanomaterials such as carbon nanotubes and silver-titanium oxide. The experiment was conducted out on the solar pond without and with phase change material, as well as with carbon nanotubes and silver-titanium oxide inclusion. The experimental results exhibit that the phase change material used to store the majority of solar energy, the temperature difference measured at night for the solar pond with nanoparticle-infused phase change material was minimal. The energy storage capacity of the solar pond increases by 7.8%, 21.8%, and 25% when it is coupled with paraffin wax, silver-titanium oxide/paraffin wax, and carbon nanotubes/paraffin wax. The average temperature variation of the solar pond was observed on the weekly basis by 3°C, 5°C, and 7.5°C when it is coupled with paraffin wax, silver-titanium oxide/paraffin wax, and carbon nanotubes /paraffin wax respectively. It is concluded that compared to simple phase change material, the silver-titanium oxide, and carbon nanotubes have better performance in the storage of thermal energy.

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Numerical Modeling of Solar Ponds

Cited by 18 publications

References 25 publications

Advances in solar pond technology and prospects of efficiency improvement methods

Advances in solar pond technology and prospects of efficiency improvement methods

Thermal analysis of a mini solar pond of small surface area while extracting heat from lower convective layer

Comparative energy storage study on solar pond with PCM coupled with different Nano particles

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