An Origami Heat Radiation Fin for Use in a Stretchable Thermoelectric Generator

Akuto, Momoe; Iwase, Eiji

doi:10.3390/mi11030263

Cited by 9 publications

(9 citation statements)

References 17 publications

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“…Next, the theory was verified using the origami device with a structure that can be modeled in the 6-bar linkage model. This device was based on a recent study of thermoelectric generators (TEGs) using origami structures for the substrate to make it flexible (origami-TEG) (8,9). In this study, the origami structure of the origami-TEG was fabricated by self-folding (Figure S2, Movie S2, Supporting Information).…”

Section: Experimental Verification Of the Self-folding Methodsmentioning

confidence: 99%

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Self‐Folding Method Using a Linkage Mechanism for Origami Structures

Sato

Iwase

2023

Advanced Intelligent Systems

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Origami is garnering attention in fields such as medical and electronic devices as this approach allows transitioning from a 2D to a 3D structure. Self‐folding method is effective for fabricating origami structures, but conventional strategy of self‐folding by driving all hinges is unsophisticated and thus makes redundancy and unnecessary limitations in fabrication. The behavior of deformation of origami structures can be described as a linkage mechanism, so that the degree of freedom of the origami structure is essentially not equal to the number of hinges. Herein, a self‐folding method is proposed for origami structures such that an entire structure can be folded by driving only a few hinges using the characteristics of force transmission of origami as a linkage mechanism. This proposed self‐folding method allows the selection of the position of the driving hinges and enables the self‐folding of origami structures with the restrictions of the position of the driving hinge. In addition, the method can provide high process compatibility for the fabrication and folding processes of origami devices.

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Section: Experimental Verification Of the Self-folding Methodsmentioning

confidence: 99%

“…[ 1,2 ] The property of seamless transformation from a 2D to a 3D shape, which can be easily applied to various fabrication processes, motivates applications in a wide range of fields, such as medical care, robotics, and electronic devices. [ 3–25 ]…”

Section: Introductionmentioning

confidence: 99%

Self‐Folding Method Using a Linkage Mechanism for Origami Structures

Sato

Iwase

2023

Advanced Intelligent Systems

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“…Therefore, their application in TEGs should be handled with caution. In contrast, structure-based approaches include reducing the device’s thickness, weaving in fibrous materials, and creating a folded structure on the substrate [ 15 , 16 , 17 , 18 ]. In particular, providing origami structures such as bellows folds on the substrate is a promising method for realizing flexible TEGs because it enables both the flexibility of the entire device, owing to the substrate structure, and the usage of rigid and high-performance inorganic TE elements.…”

Section: Introductionmentioning

confidence: 99%

Origami-Type Flexible Thermoelectric Generator Fabricated by Self-Folding

2023

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The flexibility of thermoelectric generators (TEGs) is important for low-contact thermal resistance to curved heat sources. However, approaches that depend on soft materials, which are used in most existing studies, have the problem of low performance in terms of the substrate’s thermal conductivity and the thermoelectric conversion efficiency of the thermoelectric (TE) elements. In this study, we propose a method to fabricate “Origami-TEG”, a TEG with an origami structure that enables both flexibility and the usage of high-performance rigid materials by self-folding. By applying the principle of the linkage mechanism to self-folding, we realized a fabrication process in which the TE element-mounting process and the active-material-addition process were separated in time. The fabricated origami-TEG showed similar internal resistance and maximum output power when attached to heat sources with flat and curved surfaces. Furthermore, it exhibited high-performance stability against both stretching and bending deformations.

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“…It is reported that the W‐fold and Miura Ori cooling rates were 55% and 67% higher than that of a flat geometry, respectively. Furthermore, a study of thermoelectric generators carried out by Akuto and Iwase 31 for curved heat sources found that for an origami‐finned substrate, the (natural convection) heat transfer coefficient was 1.9 times higher than that of a flat substrate, whilst the finned substrate had a surface area 8 times larger than the flat substrate. In addition, it is reported that when the origami fin was contracted to 50% of its full length, the heat transfer coefficient was still 92% of a flat state's coefficient.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of dynamic, origami‐inspired geometries: An experimental study

et al. 2023

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Origami has become an increasingly popular geometry in thermal engineering, namely, heat regulatory applications such as heat sinks and radiators. In this study, the radiative heating and radiative and natural convective cooling of three origami geometries (W-fold, Miura Ori (1), and Miura Ori (2)) made of heavy-duty aluminum foil under a radiative heater with different powers (800, 1600, and 2400 W) and different compression lengths (0.15, 0.25, 0.35, and 0.45 m) were investigated. It was found that the Miura Ori (1) and Miura Ori (2) geometries have three to four times hightemperature differences (the maximum temperature at the end of the heating process minus the initial temperature) than the W-fold geometry. The Miura Ori (2) and Miura Ori (1) geometries produced high heat capacity enhancements of 1.2-3.2 times at high compression lengths that showed great potential for applications such as solar steam generators. The overall heat transfer coefficient for cooling can be controlled by changing the compression length of the origami geometry, allowing for dynamic surface

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An Origami Heat Radiation Fin for Use in a Stretchable Thermoelectric Generator

Cited by 9 publications

References 17 publications

Self‐Folding Method Using a Linkage Mechanism for Origami Structures

Self‐Folding Method Using a Linkage Mechanism for Origami Structures

Origami-Type Flexible Thermoelectric Generator Fabricated by Self-Folding

Thermal performance of dynamic, origami‐inspired geometries: An experimental study

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