Numerical Investigation of nano-PCM Melting Enhanced by Thermocapillary Convection under Microgravity Condition

Zhou, Xiaoming; Duan, Wenhao; Chi, Faxuan; Jiang, Yanni

doi:10.1007/s12217-022-09953-4

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…This phenomenon also causes fluctuations in the melting region. Similar observations were made by Zhou et al in reference [29]. Additionally, in the graph, it can be observed that for the material with an EG mass fraction of 3 wt.%, Nu initially decreases, indicating that an increase in the content of EG promotes further melting of the solid PCM.…”

Section: Effect Of Eg Content On Melting Propertiessupporting

confidence: 87%

Thermal Performance Analysis of Composite Phase Change Material of Myristic Acid-Expanded Graphite in Spherical Thermal Energy Storage Unit

Wang

Deng

et al. 2023

Energies

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In order to improve energy storage efficiency and promote the early achievement of global carbon neutrality goals, this paper proposes a spherical thermal storage unit filled with a composite phase change material (CPCM) comprising myristic acid (MA) and expanded graphite (EG). The effects of EG content and Stefan number (Ste) on the melting performance were investigated through a combination of experiments and numerical simulations. The results show that an increase in EG content (especially for ≥4 wt.% EG) leads to a temperature profile that assumes a concentric ring shape, while the melting rate increases with an increase in both the EG mass fraction and the Ste number. Compared to pure MA, the time required to complete melting was reduced by 82.2%, 85.6%, and 88.0% at EG contents of 4 wt.%, 5 wt.%, and 6 wt.%, respectively. Notably, the Ste value has a greater effect on melting when the EG content is ≤3 wt.%. The optimal EG content in the spherical cell was determined to be 4 wt.%, and a dimensionless analysis established a general correlation between the liquid mass fraction and the Fo, Ste, and Gr numbers.

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Section: Effect Of Eg Content On Melting Propertiessupporting

confidence: 87%

Thermal Performance Analysis of Composite Phase Change Material of Myristic Acid-Expanded Graphite in Spherical Thermal Energy Storage Unit

Wang

Deng

et al. 2023

Energies

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“…Han 51 conducted an experiment by adding 3% volume fraction of Al 2 O 3 nanoparticles to PCM and observed a significant improvement in the melting performance and a 15% reduction in melting time. Zhou 52 investigated the impact of nanoparticles, including CNT, Cu, and Al 2 O 3 , on the melting process of PCM under microgravity conditions. They found that CNT was more effective in enhancing the phase transition of n -octadecane.…”

Section: Internal Structure To Enhance Heat Exchangementioning

confidence: 99%

Progress in the Study of Enhanced Heat Exchange in Phase Change Heat Storage Devices

et al. 2023

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In comparison with sensible heat storage devices, phase change thermal storage devices have advantages such as high heat storage density, low heat dissipation loss, and good cyclic performance, which have great potential for solving the problem of temporal and spatial imbalances in the transfer and utilization of heat energy. However, there are also issues such as the small thermal conductivity of phase change materials (PCMs) and poor efficiency in heat storage and release, and in recent years, enhanced heat transfer in phase change thermal storage devices has become one of the research hotspots for optimizing thermal storage devices. Although there have been reviews of enhanced heat transfer technology for phase change thermal storage devices in the literature, there is still insufficient research on the summarization of the enhanced heat transfer mechanism, structural optimization, and applications of phase change thermal storage devices. This Review provides a review of enhanced heat transfer in phase change thermal storage devices from two aspects: internal structure enhanced heat transfer and heat exchange medium flow channel enhanced heat transfer. It summarizes the enhanced heat transfer measures of various types of phase change thermal storage devices and discusses the role of structural parameters in enhanced heat transfer. It is hoped that this Review will provide some references for scholars engaged in research on phase change thermal storage heat exchangers.

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Influence of immiscible intermediate fluid on melting process in a horizontal shell-and-tube phase change material storage

Mousavi Ajarostaghi,

Hosseinian-Sorkhi,

Arıcı

2023

J Therm Anal Calorim

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Numerical Investigation of nano-PCM Melting Enhanced by Thermocapillary Convection under Microgravity Condition

Cited by 5 publications

References 17 publications

Thermal Performance Analysis of Composite Phase Change Material of Myristic Acid-Expanded Graphite in Spherical Thermal Energy Storage Unit

Thermal Performance Analysis of Composite Phase Change Material of Myristic Acid-Expanded Graphite in Spherical Thermal Energy Storage Unit

Progress in the Study of Enhanced Heat Exchange in Phase Change Heat Storage Devices

Influence of immiscible intermediate fluid on melting process in a horizontal shell-and-tube phase change material storage

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