Simulations of Melting of Encapsulated CaCl2·6H2O for Thermal Energy Storage Technologies

Puertas, Antonio M.; Romero-Cano, Manuel S.; Nieves, F. J. de las; Rosiek, Sabina; Batlles, F.J.

doi:10.3390/en10040568

Cited by 8 publications

(3 citation statements)

References 38 publications

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“…Copper [29] Steel [30] Aluminum [13] Nickel [29] Density (kg/m Properties-thermoplastic PVC [31] Resin epoxy [23] Polystyrene [32] Polypropylene [33] Density (kg/m The length (LPV), the depth (lb) and the thickness (eb) of the aluminum box were taken as 1m, 30mm and 4mm respectively. The inclination angle of the system, the ambient temperature, the incident radiation and the solar radiation absorption coefficient were all chosen as 45 o , 293K, 750W/m 2 and 0.9 respectively.…”

Section: Properties-metalmentioning

confidence: 99%

Numerical Investigation of the Optimization of PV-System Performances Using a Composite PCM-Metal Matrix for PV-Solar Panel Cooling System

Selabi¹,

Lenwoue²,

Djouonkep³

2021

JFFHMT

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During the conversion of solar photovoltaic energy, the heat generated raises the temperature and results in reduced electricity conversion efficiency of the system. As the operating temperature plays a great role in the photovoltaic conversion process, cooling the operating surface is a key factor to consider in achieving higher efficiency. Numerical investigation using composite phase change materials (PCMs) in photovoltaic-cooling (PV-cooling) system was adopted in this study. Selected materials such as CaCl2.6H2O, paraffin wax, RT25, RT27, SP29, n-octadecane were used as PCMs while copper, aluminium, steel, nickel, polystyrene, polychlorovinyl and polypropylene were used as composite(matrix) materials. A two-dimensional transient heat transfer model based on enthalpy approach developed by computational Fluid Dynamics (CFD-Ansys-Fluent software) was utilized for optimization and enhancing the energy conversion efficiency. The numerical results showed that RT25 sphere has good compatibility with PV-cooling system, and the thermal conductivity barely had a significant value on PV-temperature for larger values, excepted for very low thermal conductivity materials such as plastics.

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Section: Properties-metalmentioning

confidence: 99%

Numerical Investigation of the Optimization of PV-System Performances Using a Composite PCM-Metal Matrix for PV-Solar Panel Cooling System

Selabi¹,

Lenwoue²,

Djouonkep³

2021

JFFHMT

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“…Moreover, such operations resulted in decreased PCM mass by about 1.5%. Puertas et al [110] used numerical simulations to examine the influence of the capsule's thermal conductivity on the melting time of PCM. They found that the melting time decreased by 20% when the thermal conductivity of the capsule increased 100 times.…”

Section: Encapsulationmentioning

confidence: 99%

The Impact of Additives on the Main Properties of Phase Change Materials

2020

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The main drawback of phase change materials (PCMs) is their low thermal conductivity, which limits the possibilities of a wide range of implementations. Therefore, the researchers, as found in the literature, proposed several methods to improve the thermal conductivity of PCMs, including inserting high thermal conductivity materials in nano-, micro-, and macro-scales, as well as encapsulation of PCMs. However, these inserts impact the other properties of PCMs like latent heat, melting temperature, thermal stability, and cycling stability. Hence, this paper aims to review the available in the open literature research on the main properties of enhanced PCMs that undergo solid–liquid transition. It is found that inserting high thermal conductivity materials and encapsulation results in improved thermal conductivity of PCMs, but it decreases their latent heat. Moreover, the insertions can act as nucleating agents, and the supercooling degree can be reduced. Some of the thermal conductivity enhancers (TCEs) may prevent PCMs from leakage. However, some test results are inconsistent and some seem to be questionable. Therefore, this review indicates these discrepancies and gaps in knowledge and points out possible directions for further research.

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“…The phase transition process caused by changes in ambient temperature employs the latent heat method to store and release thermal energy. Constant temperature can be maintained by isothermal absorption and release of heat; this enables efficient use of energy in space and time [8][9][10][11]. PCMs are widely used in a wide range of energy conversion fields such as waste heat recovery, Li-ion batteries, building insulation, and solar energy storage [12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on The Applications of Phase Change Materials in Cold Thermal Energy Storage: A Critical Review

Rashid,

Al-Obaidi,

Dulaimi

et al. 2023

J. Compos. Sci.

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Cold thermal energy storage (CTES) based on phase change materials (PCMs) has shown great promise in numerous energy-related applications. Due to its high energy storage density, CTES is able to balance the existing energy supply and demand imbalance. Given the rapidly growing demand for cold energy, the storage of hot and cold energy is emerging as a particularly attractive option. The main purpose of this study is to provide a comprehensive overview of the current research progress on the utilisation of PCMs in CTES. The greatest difficulties associated with using PCMs for CTES are also examined in this overview. In this regard, a critical evaluation of experimental and numerical studies of the heat transfer properties of various fundamental fluids using PCMs is conducted. Specifically, several aspects that affect the thermal conductivity of PCMs are investigated. These factors include nanoparticle-rich PCM, a form of encapsulated PCM, solids volume percentage, and particle size. Discussions focus on observations and conclusions are drawn from conducted studies on PCMs used in CTES. Based on the findings of this study, a set of plausible recommendations are made for future research initiatives.

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Simulations of Melting of Encapsulated CaCl2·6H2O for Thermal Energy Storage Technologies

Cited by 8 publications

References 38 publications

Numerical Investigation of the Optimization of PV-System Performances Using a Composite PCM-Metal Matrix for PV-Solar Panel Cooling System

Numerical Investigation of the Optimization of PV-System Performances Using a Composite PCM-Metal Matrix for PV-Solar Panel Cooling System

The Impact of Additives on the Main Properties of Phase Change Materials

Recent Advances on The Applications of Phase Change Materials in Cold Thermal Energy Storage: A Critical Review

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