Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study

Zhang, Yongdong; Chen, Miao-Ru; Wu, Jiangbo; Hung, Kuo-Shu; Wang, Chi-Chuan

doi:10.3390/en14123585

Cited by 17 publications

(6 citation statements)

References 70 publications

(78 reference statements)

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“…They conducted research to understand flow characteristics and improve flow distribution and pressure drop similar to this publication. In turn, Zhang and co-authors in [11] proposed an innovative design with dense ribs of less thickness in the upper layer and relatively low ribs of greater thickness in the lower layer to further improve the overall thermal efficiency of a two-layer microchannel heat exchanger; the numerical model was based on similar equations presented in this publication. In the works on numerical modeling [12][13][14][15], the authors use numerical models to optimize heat exchangers, both traditional and heat pipes, and obtain results similar to the results obtained in this publication.…”

Section: Discussionmentioning

confidence: 99%

Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers

et al. 2021

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This paper presents research results on heat pipe numerical models as optimization of heat pipe heat exchangers for intensification of heat exchange processes and the creation of heat exchangers with high efficiency while reducing their dimensions. This work and results will allow for the extension of their application in passive and low-energy construction. New findings will provide a broader understanding of how heat pipes work and discover their potential to intensify heat transfer processes, heat recovery and the development of low-energy building engineering. The need to conduct research and analyses on the subject of this study is conditioned by the need to save primary energy in both construction engineering and industry. The need to save primary energy and reduce emissions of carbon dioxide and other pollutants has been imposed on the EU Member States through multiple directives and regulations. The presented numerical model of the heat pipe and the results of computer simulations are identical to the experimental results for all tested heat pipe geometries, the presented working factors and their best degrees of filling.

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Section: Discussionmentioning

confidence: 99%

Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers

et al. 2021

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“…Additionally, by appropriately increasing the AR or selecting a coolant with low dynamic viscosity, the thermal performance of DL‐MCHS could be improved. To further enhance the overall performance of DL‐MCHS, Zhang et al 106 set dense fins with smaller thickness for the upper layer and relatively sparse fins with larger thickness for the lower layer which not only forced more fluid to flow to the bottom layer but also reduced the maximum temperature on the substrate by 1.06 K and outperformed PEC > 1.05 when Re = 200 ~ 420.…”

Section: Channel Patternmentioning

confidence: 99%

Research progress of the liquid cold plate cooling technology for server electronic chips: A review

Zhou

Dong

Sun

et al. 2022

Intl J of Energy Research

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A significant quantity of research has been dedicated to the application of liquid cold plates to eliminate the high heat flux in server electronic chips. Traditional parallel straight microchannel liquid cold plates suffer from low heat flux density with uneven flow distribution, which poses a serious challenge to high-performance server chip heat dissipation. This paper reviews recent research progress in geometry optimization, interrupted structures, channel patterns, and two-phase flow of liquid cold plates. The optimal geometry parameters of rectangular cross-sectional microchannels including the aspect ratio, length, and hydraulic diameter are summarized. Inquest of higher thermal performance, various interrupted structures (ribs, pin fins, etc.), special channel patterns (wavy-shaped, zigzag-shaped, fractal, serpentine, and doublelayered microchannels, etc.), and two-phase flow on the liquid cold plate are applied to promote fluid-turbulivity and increase heat transfer area, meanwhile they lead to more pressure drop. Furthermore, it is an essential approach to commercialize liquid cold plates by applying the academic and prototype of the liquid cold plate to manufacturing and liquid cooling system solutions. In the end, this review provides a discussion about the limitations of current research on liquid cold plates and an outlook on future research directions.

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“…The heat sink traditionally has a plate or needle design [9,10]. Heat sinks that possess a lattice [11], two-layer [12], cone-column [13], and microchannel [14,15] structure are less prevalent. Porous materials [16] have great potential and, due to their developed surface area and tortuous current paths, have high thermal characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Thermal and Hydraulic Characteristics of Plate-Fin Heat Sinks

Soloveva,

Solovev,

Shakurova

2024

Processes

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One of the main trends in the development of the modern electronics industry is the miniaturization of electronic devices and components. Miniature electronic devices require compact cooling systems that can dissipate large amounts of heat in a small space. Researchers are exploring ways to improve the design of the heat sink of the cooling system in such a way that it increases the heat flow while at the same time reducing the size of the heat sink. Researchers have previously proposed different designs for heat sinks with altered fin shapes, perforations, and configurations. However, this approach to optimizing the design of the heat sink results in an increase in the labor intensity of its production. Our goal is to optimize the heat sink design to reduce its size, reduce metal consumption, and increase heat flow. This goal is achieved by changing the number of fins and the distance between them. In this case, there is no significant difference in the geometry of a conventional plate-fin heat sink, and a low labor intensity of production is ensured. A numerical investigation of heat flow and pressure drop in models of plate-fin heat sinks of various sizes and metal volumes was conducted using the ANSYS Fluent software package (v. 19.2) and computational fluid dynamics employing the control volume method. We used the SST k-ω turbulence model for the calculations. The research results showed that by changing the number of fins and the distance between them, it is possible to increase the heat flow from the heat sink to 24.44%, reduce its metal consumption to 6.95%, and reduce its size to 30%. The results of this study may be useful to manufacturers of cooling systems who seek to achieve a balance between the compactness of the heat sink and its ability to remove large amounts of heat.

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Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study

Cited by 17 publications

References 70 publications

Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers

Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers

Research progress of the liquid cold plate cooling technology for server electronic chips: A review

Numerical Study of the Thermal and Hydraulic Characteristics of Plate-Fin Heat Sinks

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