A review of state of the art thermal diodes and their potential applications

Wong, Man; Tso, Chi Yan; Ho, Tsz Chung; Lee, Hau Him

doi:10.1016/j.ijheatmasstransfer.2020.120607

Cited by 91 publications

(54 citation statements)

References 128 publications

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“…In composites, the poor rectification can be ascribed to the thermal resistance at the interfaces. For instance, the calculated resistance at the interface between octane and single-layer graphene sheets (GS, which shows extremely high values of thermal conductivity, i.e., 3000–5000 Wm −1 k −1 [ 63 ]), has been reported to be 10 times smaller when the alkane chains are covalently bonded at the edges of these GSs [ 64 ]. Pal and Puri found higher rectification using a single-wall carbon nanotube (SWCNT) covalently bonded near one end to polyacetylene (PA) chains [ 65 ].…”

Section: Effect Of Thermal Properties Of Polymer Composites On Crystallization and Meltingmentioning

confidence: 99%

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Impact of Thermal Properties on Crystalline Structure, Polymorphism and Morphology of Polymer Matrices in Composites

Raimo

2021

Materials

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Morphological analysis at different levels is fundamental to understand properties of materials, as these latter are dictated not only by the chemical composition but also by the shape. Solid structures arise from a balance between thermodynamic and kinetic factors, which, especially for polymer composites, depend also on interactions amongst components. In particular, morphology is strongly affected by the heat transfer pattern during crystallization and by the difference in thermal behavior between polymer matrix and filler. Polymers show a spherulitic structure, arising from the start of crystallization in several points of the liquid phase. Within a general rounded shape, spherulites show variability in growth patterns, morphology, and geometry of boundaries. The appearance and the number of spherulites, as well as their growth mechanism, may vary not only in dependence of the chemical composition and the crystalline structures but also, for a same polymer, in consequence of experimental conditions and incorporation of fillers. This article reviews the crystallization process of polymer matrices in the framework of crystal growth and heat transport theories, and explains microstructural differences between composites and neat matrices on the basis of the differences in thermal capacity and conductivity between polymers and additives.

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Section: Effect Of Thermal Properties Of Polymer Composites On Crystallization and Meltingmentioning

confidence: 99%

“… a [ 1 , 45 , 46 , 47 , 48 , 49 , 50 , 57 ], b [ 67 , 71 ], c [ 81 , 83 , 92 ], d [ 93 ], e [ 66 , 93 , 94 ], f [ 60 , 61 , 62 , 63 , 64 , 65 ]. …”

Section: Figures Scheme and Tableunclassified

Impact of Thermal Properties on Crystalline Structure, Polymorphism and Morphology of Polymer Matrices in Composites

Raimo

2021

Materials

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“…In recent years, solid-state thermal control devices ( Swoboda et al., 2020 ) have received increased attention as a potential solution for improved energy management, storage, or conversion ( Klinar et al., 2020b ; Liu et al., 2019 ; Swoboda et al., 2020 ; Wong et al., 2021 ). Thermal diodes, regulators, switches, or transistors are capable of managing heat in a manner analogous to how electricity is controlled by their electrical counterparts ( Wehmeyer et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Thermal rectification in multilayer phase change material structures for energy storage applications

et al. 2021

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Summary Solid-state thermal control devices that present an asymmetric heat flow depending on thermal bias directionality, referred to as thermal diodes, have recently received increased attention for energy management. The use of materials that can change phase is a common approach to design thermal diodes, but typical sizes, moderate rectification ratios, and narrow thermal tunability limit their potential applications. In this work, we propose a multilayer thermal diode made of a combination of phase change and invariant materials. This device presents state-of-the-art thermal rectification ratios up to 136% for a temperature range between 300 K and 500 K. Importantly, this design allows to switch between distinct rectification states that can be modulated with temperature, achieving an additional degree of thermal control compared with single-rectification-state devices. We analyze the relevance of our thermal diodes for retaining heat more efficiently in thermal storage elements.

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“…Alihosseini et al [3] focused mostly on studying discrepancy in a cross-section effect on the thermal properties efficiency of micro channel heat sinks. Wong et al [4] provided a broad review of experimental and numerical studies for different styles of thermal diodes applied in past years. The thermal diodes mentioned there were categorized based on their main heat transfer procedure and the constituents to create them.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of Mixed Convection Cooling of Microprocessor Using CuO Nanofluid. (Dept. M)

El-Khouly

Sultan

ElBouz

2021

MEJ. Mansoura Engineering Journal

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A review of state of the art thermal diodes and their potential applications

Cited by 91 publications

References 128 publications

Impact of Thermal Properties on Crystalline Structure, Polymorphism and Morphology of Polymer Matrices in Composites

Impact of Thermal Properties on Crystalline Structure, Polymorphism and Morphology of Polymer Matrices in Composites

Thermal rectification in multilayer phase change material structures for energy storage applications

Theoretical Study of Mixed Convection Cooling of Microprocessor Using CuO Nanofluid. (Dept. M)

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