Effect of the passage area ratio of liquid to vapor on an ultra-thin flattened heat pipe

Zhou, Wenjie; Li, Yong; Chen, Zhaoshu; Deng, Liqiang; Gan, Yong

doi:10.1016/j.applthermaleng.2019.114215

Cited by 52 publications

(9 citation statements)

References 39 publications

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“…Zhou et al [26] confirmed the effect of liquid to vapor passage area ratio on the heat transfer performance of flat heat pipe in a horizontal state. The width of the wick structure controlled the ratio of liquid to vapor channel of a flat heat pipe.…”

Section: Mesh Wickmentioning

confidence: 91%

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Flat plate two-phase heat spreader on the thermal management of high-power electronics: a review

Lim

Lee

2021

J Mech Sci Technol

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As the cooling capacity of the active cooling devices has reached their allowable heat flux limit, heat spreading technologies are becoming more remarkable in the thermal management of high-power electronics. Flat plate two-phase heat spreaders (FTHSs) are advantageous for the thermal management of electronic devices due to their simplicity, powerfree operation, and high reliability. This review is based on understanding the working mechanism and limitations of FTHSs. As the power density of electronic devices increases, researchers focus on performance improvement to overcome their malfunctioned working conditions. This review summarizes the major parameters of FTHS that affect heat transfer performance. Moreover, recent advances in FTHSs suggest that new design concepts can extend the maximum operating heat flux of thermal management devices. This review can establish a direction for studying higher-performance heat spreaders and identifying the latest trends.

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Section: Mesh Wickmentioning

confidence: 91%

“…However, it is recently attracting attention in the thermal management of ultrathin or flexible applications because of the shape of the mesh. [25], mesh [26], and sintered particles wick structures [27].…”

Section: Mesh Wickmentioning

confidence: 99%

Flat plate two-phase heat spreader on the thermal management of high-power electronics: a review

Lim

Lee

2021

J Mech Sci Technol

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“…Based on the structure and data of the ultra-thin flat heat pipe, ten similar articles are summarized to facilitate the comparative analysis of the factors affecting the heat transfer of the heat pipe. The structure is shown in Figure 9 [ 11 , 18 , 40 , 41 , 45 , 48 , 50 , 52 , 55 , 56 ], and the corresponding temperature profile is shown in Figure 10 [ 11 , 18 , 40 , 41 , 45 , 48 , 55 , 56 ]. Relying on the copper pipe as the carrier, the various derivatives (copper foam, mesh, spiral woven mesh, copper powder) are used to build wick structures, striving to achieve better heat transfer performance in small spaces.…”

Section: Manufacturing Process For Ultra-thin Heat Pipesmentioning

confidence: 99%

“…Comparing the structure in Figure 9 c [ 45 ] and the structure in Figure 9 e [ 55 ] with similar wick structures, the internal space of the structure in Figure 9 e [ 55 ], of the heat pipe, is about three times that of the structure in Figure 9 c [ 45 ], and the maximum heat transfer capacity of the structure in Figure 9 e [ 55 ] is 170% of the structure in Figure 9 c [ 45 ], as shown in Figure 10 d [ 55 ] and Figure 10 b [ 45 ]. The advantage in the internal space of the heat pipe does not bring ideal heat transfer to the structure in Figure 9 e [ 55 ], and the structure of copper + mesh ( Figure 9 c [ 45 ]) is smaller than the mixing of meshes of different meshes.…”

Section: Manufacturing Process For Ultra-thin Heat Pipesmentioning

confidence: 99%

Research on the Manufacturing Process and Heat Transfer Performance of Ultra-Thin Heat Pipes: A Review

Duan

et al. 2022

Materials

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This paper reviews the manufacturing process of ultra-thin heat pipes and the latest process technologies in detail, focusing on the progress of the shape, structure, and heat transfer mechanism of the wick. The effects of the filling rate and tilt angle on the heat transfer performance of the ultra-thin heat pipe, as well as the material selection of ultra-thin heat pipes, is sorted out, and the surface modification technology is analyzed. Besides, the optimal design based on heat pipes is discussed. Spiral woven mesh wick and multi-size composite wick have significant advantages in the field of ultra-thin heat pipe heat transfer, and comprehensive surface modification technology has huge potential. Finally, an outlook on future scientific research in the field of ultra-thin heat pipes is proposed.

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“…The length, width, and thickness of the heat pipe was 150, 8.5, and 1.0 mm, respectively. Zhou et al (2019) developed an ultra-thin heat pipe of 120  9  0.75 mm with a centered wick structure. The height of the vapor flow channel was 0.35 mm.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Analysis on the Effect of Deviation From a Centered Wick Structure in an Ultra-Thin Flattened Heat Pipe

Koito¹

2021

Frontiers in Heat and Mass Transfer

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For ultra-thin heat pipes, a centered wick structure is often used. In this study, a numerical analysis is performed on an ultra-thin heat pipe in which the wick structure's position has deviated from the center. A 3D heat pipe model, developed by the author in a previous study, is extended, and numerical calculations are conducted to determine any differences in performance because of an off-center wick. The major findings are as follows: (1) a completely centered wick structure is recommended for optimum performance;(2) accurate central positioning of the wick structure is important in the fabrication process of ultra-thin heat pipes.

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Effect of the passage area ratio of liquid to vapor on an ultra-thin flattened heat pipe

Cited by 52 publications

References 39 publications

Flat plate two-phase heat spreader on the thermal management of high-power electronics: a review

Flat plate two-phase heat spreader on the thermal management of high-power electronics: a review

Research on the Manufacturing Process and Heat Transfer Performance of Ultra-Thin Heat Pipes: A Review

A Numerical Analysis on the Effect of Deviation From a Centered Wick Structure in an Ultra-Thin Flattened Heat Pipe

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