A Cartesian grid solver for simulation of a phase-change material (PCM) solar thermal storage device

Augspurger, Mike; Udaykumar, H. S.

doi:10.1080/10407790.2015.1097106

Cited by 30 publications

(9 citation statements)

References 51 publications

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“…Besides, the pressure equation based on PRESTO method. The rest of the parameters are all defaults [29]. The convergence of study supervised by testing the numerically solved governing equations is reduced to less than 10 -8 the number of iterations per time step is set to 100 and the time step is set at 1 s. The simulation was performed on a 2 GHz Intel Core i5 processor with 4 GB of RAM.…”

Section: Resultsmentioning

confidence: 99%

Improvement of Thermal Energy Storage by Integrating PCM Into Solar System

Zohra

Riad

Alhamany

et al. 2020

Journal of Thermal Engineering

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The solar heater is a system that generates hot water by converting solar energy to thermal energy. In these last few years, various ways have been developed to gather this natural energy. However, they can not be able to store the energy when the sun disappears. In this study, thermal system based on phase change materials that improves the hot water production and stores thermal energy is proposed. In order to describe phase change materials and considers the effects of inclination angle on the production and storing thermal energy a numerical study has been carried out using the ANSYS-Fluent software. In addition, details concerning the choice of calculation range, mesh size, boundary conditions and turbulence model have been provided. The numerical results have been compared with previous data that was very promising.

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Section: Resultsmentioning

confidence: 99%

Improvement of Thermal Energy Storage by Integrating PCM Into Solar System

Zohra

Riad

Alhamany

et al. 2020

Journal of Thermal Engineering

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“…In addition, the control parameters are used by default. Furthermore, the SIMPLEC method is adopted in pressure, velocity coupling mode, the mode of retention is PRESTO method, and the rest are all defaults [14,17].…”

Section: Resultsmentioning

confidence: 99%

Coupled thermo-fluidic model for thermal energy storage based on liquid solid phase change

Zohra

Riad

Alhamany

et al. 2020

Mater. Res. Express

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The production and storage of thermal energy are important processes that contribute to the satisfaction of daily needs. They are effective ways of managing the thermal energy available from various solar applications. The most efficient storage technique is the use of phase change materials (PCMs) because these components can keep large amounts of thermal energy in stock. The problem is that this approach continues to be confronted with difficulties despite significant progress in research, design and modelling. Nevertheless, these difficulties can be resolved through numerical simulations that enable the identification of powerful tools for optimising thermal system design and predicting thermal behaviour. Correspondingly, in this work, thermo-mechanical modelling was conducted to describe the different methods of heat transfer that can optimise thermal energy storage via PCMs. This study also established a numeric resolution and the spatio-temporal discretisation of the basic equations accompanying the numerical model. The proposed numerical solution improves the prediction of thermal behaviour and can be used as a guide in designing new systems capable of producing and storing solar energy.

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“…In the process of heat storage, the simulation results of temperature at point D (as shown in fig. 1) of single tank heat storage unit model at different times are compared with the experimental results and numerical simulation results in reference [14], as shown in fig. 2.…”

Section: Comparison and Verification Of Numerical Modelmentioning

confidence: 99%

Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

2020

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Objective: In this study, the single tank inclined layer heat storage system is simulated and analyzed by computer, so as to explore the performance of the heat storage device of the solar thermal generator system. Method: First of all, for the phase change thermal storage unit, its physical model of is established. Heat transfer fluid is Hitec salt, and phase change material is potassium nitrate. Then, as for the phase change thermal storage unit, its numerical model of is established. The simulation results of the numerical model are verified. Finally, through numerical simulation, how do the inlet velocity of the heat exchange fluid and the ambient temperature influence the heat storage performance is analyzed. Results: The heat storage period of the regenerator will decrease when the inlet velocity of the heat exchange fluid increases, but the heat storage efficiency of the regenerator will decrease. Therefore, in this study, under the premise of ensuring a higher heat storage efficiency and a shorter heat storage cycle, it is more reasonable to choose 0.25 m/s as the inlet velocity. In winter and summer, it is necessary to insulate the tank. On the one hand, the heat loss can be reduced. On the other hand, the heat storage efficiency of single tank can be improved. Conclusion: Analysing the efficiency of the single tank thermal storage device can provide a reference for the optimal design of the solar heat plant thermal storage tank, and lay a certain foundation for its theoretical and experimental research.

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A Cartesian grid solver for simulation of a phase-change material (PCM) solar thermal storage device

Cited by 30 publications

References 51 publications

Improvement of Thermal Energy Storage by Integrating PCM Into Solar System

Improvement of Thermal Energy Storage by Integrating PCM Into Solar System

Coupled thermo-fluidic model for thermal energy storage based on liquid solid phase change

Analysis of thermal storage performances of solar thermal power generation unit using computer numerical simulation analysis

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