Design and Optimization of Lamellar Phase Change Composites for Thermal Energy Storage

Tamraparni, Achutha; Hoe, Alison; Deckard, Michael; Zhang, Chen; Elwany, Alaa; Shamberger, Patrick J.; Felts, Jonathan R.

doi:10.1002/adem.202001052

Cited by 17 publications

(2 citation statements)

References 45 publications

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“…However, due to the inherently low thermal conductivity of PCM, it is a challenge to achieve efficient heat dissipation in temperature management, which limits their further engineering applications [ 17 , 18 ]. To address this drawback, various methods have been developed to improve the thermal conductivity of PCM, including inserting metal fins [ 19 , 20 ], adding high thermal conductivity nanoparticles [ 21 ], embedding metal foams [ 22 , 23 ] and microencapsulating [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance of Heat Sink Filled with Double-Porosity Porous Aluminum Skeleton/Paraffin Phase Change Material

Huang,

Long,

et al. 2024

Micromachines

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Phase change materials (PCMs) are used to cool high-power-density electronic devices because of their high latent heat and chemical stability. However, their low thermal conductivity limits the application of PCMs. To solve this problem, a double-porosity porous aluminum skeleton/paraffin phase change materials (DPAS/PCM) was prepared via additive manufacturing and the water-bath method. The thermal performance of the DPAS/PCM heat sink (HS) was experimentally investigated to examine the effects of the positive- and reverse-gradient porosity structures of the DPAS/PCM. The results show that a positive-gradient porosity arrangement is more conducive to achieving a low-temperature cooling target for LED operation. In particular, the temperature control time for the positive gradient porosity structure increased by 4.6–13.7% compared with the reverse gradient porosity structure. Additionally, the thermal performances of uniform porous aluminum skeleton/paraffin (UAS) and DPAS/PCMs were investigated. The temperature control effect of the DPAS/PCM was better than that of the UAS/PCM HS at high critical temperatures. Compared with the UAS/PCM HS, the temperature control time of the DPAS/PCM HS is increased by 7.8–12.5%. The results of this work show that the prepared DPAS/PCM is a high-potential hybrid system for thermal management of high-power electronic devices.

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Section: Introductionmentioning

confidence: 99%

Thermal Performance of Heat Sink Filled with Double-Porosity Porous Aluminum Skeleton/Paraffin Phase Change Material

Huang,

Long,

et al. 2024

Micromachines

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“…PCMs that can store or release a great amount of latent heat through the phase-change process have been considered as one of the most promising candidates for thermal energy storage. − However, the leakage of PCMs at their liquid state has hindered them from the large-scale applications. In order to solve the leakage problem, the incorporation of PCMs into different supporting materials has been carried out to get form-stable PCMs, such as inorganic porous/lamellar materials − and polymers . Among them, using electrospun ultrafine fibers as the supporting material is one of the most efficient ways to prepare shape-stable PCMs, which can prevent PCMs from flowing and solve the leakage issue by the sturdy hydrogen bonds and electrostatic entanglement between PCMs and polymers. − …”

Section: Introductionmentioning

confidence: 99%

Electrospun Lignin-Based Phase-Change Nanofiber Films for Solar Energy Storage

Niu

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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Functional materials for solar energy collection, conversion, and storage need to be developed to address the global energy crisis. In this study, phase-change nanofiber films [PCNFs, sodium lignosulfonate (SLS)/polyvinyl alcohol (PVA)/polyethylene glycol (PEG)], which maintain their shape, were developed for solar-to-thermal energy conversion and storage. The films were constructed by electrospinning with PEG as the phase-change material, SLS/PVA mixture as the supporting matrix, and SLS as the photothermal material. SLS effectively improved the supporting property of the PCNFs owing to sturdy hydrogen bonds and electrostatic entanglement between its macromolecule chains and PVA/PEG, which prevented the leakage and transfer issue for PEG. Moreover, the PCNFs showed excellent solar-to-thermal energy conversion and storage ability, attributed to the π–π stacking of SLS molecules and the phase-change process, respectively. The SLS/PVA/PEG film with a PEG content of 32.43% exhibited a diameter of 465 ± 109 nm and a latent heat of fusion of 42.16 J·g–1, with a phase-change temperature of 45.20 °C. The film showed favorable stability over 50 heating–cooling cycles, thermal stability below 220 °C, good shape stability, and a solar-thermal energy conversion and storage efficiency of 18.03%. This study demonstrates a potential route to improve the utilization of lignin and solar energy and promotes the development of sustainable energy.

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Design of Radially Variant Phase‐Change Material Composites

et al. 2022

Self Cite

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Phase‐change materials (PCMs) and high‐conductivity elements can be combined to form highly compact and efficient composite heat sinks. However, the design challenge presented by thermal composites composed of PCMs and high‐conductivity elements remains unresolved. Herein, design guidelines are presented for radially varying cylindrical PCM composites. Numerical and analytical techniques are utilized to explore the utility and limits of optimal composite designs selecting for 1) temperature minimization, 2) specific effective heat capacity maximization, and 3) volumetric effective heat capacity maximization. Significant increases in each metric are observed when implementing radially variant designs in cylindrical geometries, especially for metrics of heat capacity. Furthermore, a hybrid approach to variant composite design is presented, allowing for the balancing of different design objectives. The utilization of a variable design under high heat flux (10 ± 1.4 W cm−2) and short melting periods (up to 50 s) is experimentally demonstrated, directly resulted in a 65% decrease in total system mass and a 200% increase in specific heat capacity while maintaining strong temperature dampening performance. In a second case study, a 23% decrease in mass is demonstrated while maintaining strong specific heat performance, emphasizing the broad utility of this approach.

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Design and Optimization of Lamellar Phase Change Composites for Thermal Energy Storage

Cited by 17 publications

References 45 publications

Thermal Performance of Heat Sink Filled with Double-Porosity Porous Aluminum Skeleton/Paraffin Phase Change Material

Thermal Performance of Heat Sink Filled with Double-Porosity Porous Aluminum Skeleton/Paraffin Phase Change Material

Electrospun Lignin-Based Phase-Change Nanofiber Films for Solar Energy Storage

Design of Radially Variant Phase‐Change Material Composites

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