High performance miniature heat pipe

Lin, Lanchao; Ponnappan, Rengasamy; Leland, John E.

doi:10.2514/6.2001-3080

Cited by 13 publications

(21 citation statements)

References 2 publications

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“…This method enhances the capillary pumping of microstructures [12]. Lin et al [13] presented a novel groove microstructure. Through experiments, the heat transfer coefficient at the condenser of this composite structure was discovered to be 120% higher than that of the traditional groove structure.…”

Section: Open Accessmentioning

confidence: 99%

Design and Fabrication of a Novel Hybrid-Structure Heat Pipe for a Concentrator Photovoltaic

2012

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This study presents a design method to fabricate a novel hybrid-structure flat plate heat pipe (NHSP heat pipe) for a concentrator photovoltaic. The NHSP heat pipe is composed of a flattened copper pipe and a sintered wick structure, and a coronary-stent-like rhombic copper mesh supports the structure. The coronary-stent-like supporting structure enhances the mechanical strength and shortens the reflux path of the working fluid. Experiments demonstrate that the sintered capillary heat pipe reduces the thermal resistance by approximately 72%, compared to a traditional copper mesh-screen heat pipe. Furthermore, it can reduce thermal resistance by 65% after a supporting structure is added to the heat pipe. The results show that the NHSP heat pipe provided the best performance for the concentrator photovoltaic, which can increase photoelectric conversion efficiency by approximately 3.1%, compared to an aluminum substrate.

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Section: Open Accessmentioning

confidence: 99%

Design and Fabrication of a Novel Hybrid-Structure Heat Pipe for a Concentrator Photovoltaic

2012

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“…The most widely used cooling method for electronics to date has been forced air convection, but this method is unable to keep up with the increasing level of heat flux due to the necessary increase in size of the metal fin-array heat sinks. A schematic of a typical fin-array heat sink is shown in Figure 1 Given the limitations of conventional forced air convection cooling, various solutions have been proposed including thermoelectric cooling [4][5][6], miniature heat pipes [7,8], microchannel heat sinks [9][10][11], and two-phase boiling [12][13][14].…”

Section: Electronics Coolingmentioning

confidence: 99%

Characterization and modeling of thermal diffusion and aggregation in nanofluids.

Gharagozloo¹,

Goodson

2010

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“…To overcome this size limitation, microchannels instead of wire-meshes are more often adopted as the wick structure for miniature or micro-heat pipes in which the capillary flow of a working fluid occurs along the microchannels. Since the report of a microchannel-based MHP by Cotter [3] in 1984, there have been many experimental and theoretical studies for the MHPs configured with different types of microgrooves [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of a Metallic Micro-Heat Pipe Based on High-Aspect-Ratio Microchannels

Lee

Jeong

2007

Heat Transfer Engineering

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The cooling capacity of a micro-heat pipe is mainly governed by the magnitude of capillary pressure induced in the wick structure. For microchannel wicks, a higher capillary pressure is achievable for narrower and deeper channels. In this study, a metallic micro-heat pipe adopting high-aspect-ratio microchannel wicks is fabricated. The micromachining of highaspect-ratio microchannels is done using the laser-induced wet etching technique in which a focused laser beam irradiates the workpiece placed in a liquid etchant along a desired channel pattern. Because of the direct writing characteristic of the laserinduced wet etching method, no mask is necessary, and the fabrication procedure is relatively simple. Deep microchannels of an aspect ratio close to 10 can be readily fabricated with little heat damage to the workpiece. The laser-induced wet etching process for the fabrication of high-aspect-ratio microchannels in 0.5 mm thick stainless steel foil is presented in detail.The shape and size variations of microchannels with respect to the process variables, such as laser power, scanning speed, number of scans, and etchant concentration, are closely examined. Also, the fabrication of a flat micro-heat pipe based on the high-aspect-ratio microchannels is demonstrated.

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High performance miniature heat pipe

Cited by 13 publications

References 2 publications

Design and Fabrication of a Novel Hybrid-Structure Heat Pipe for a Concentrator Photovoltaic

Design and Fabrication of a Novel Hybrid-Structure Heat Pipe for a Concentrator Photovoltaic

Characterization and modeling of thermal diffusion and aggregation in nanofluids.

Design and Fabrication of a Metallic Micro-Heat Pipe Based on High-Aspect-Ratio Microchannels

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