Experimental study of thermoelectric cooler box using heat sink with u-shape heat pipe and methanol working fluid

A concentric annular heat pipe heat sink (AHPHS) was proposed and fabricated to investigate its thermal behavior. The present AHPHS consists of two concentric pipes of different diameters, which create vacuumed annular vapor space. The main advantage of the AHPHS as a heat sink is that it can largely increase the heat transfer area for cooling compared to conventional heat pipes. In the current AHPHS, condensation takes place along the whole annular space from the certain heating area as the evaporator section. Therefore, the whole inner space of the AHPHS except the heating area can be considered the condenser. In the present study, AHPHSs of different diameters were fabricated and studied experimentally. Basic studies were carried out with a 50 mm-long stainless steel AHPHS with diameter ratios of 1.1 and 1.3 and the same inner tube diameter of 76 mm. Several experimental parameters such as volume fractions of 10–70%, different air flow velocity, flow configurations, and 10–50 W heat inputs were investigated to find their effects on the thermal performance of an AHPHS. Experimental results show that a 10% filling ratio was found to be the optimum charged amount in terms of temperature profile with a low heater surface temperature and water as the working fluid. For the methanol, a 40% filling ratio shows better temperature behavior. Internal working behavior shows not only circular motion but also 3-D flow characteristics moving in axial and circular directions simultaneously.

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Integration of a Pulsating Heat Pipe in a Flat Plate Heat Sink

ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels ◽

10.1115/icnmm2014-21233 ◽

2014 ◽

Author(s):

Mitchell P. Hoesing ◽

Gregory J. Michna

Keyword(s):

Thermal Resistance ◽

Flat Plate ◽

Heat Pipe ◽

Heat Sink ◽

New Technologies ◽

Operating Conditions ◽

Working Fluid ◽

High Heat Flux ◽

Pulsating Heat Pipe ◽

Plate Heat

The ongoing development of faster and smaller electronic components has led to a need for new technologies to effectively dissipate waste thermal energy. The pulsating heat pipe (PHP) shows potential to meet this need, due to its high heat flux capacity, simplicity, and low cost. A 20-turn flat plate PHP was integrated into an aluminum flat plate heat sink with a simulated electronic load. The PHP heat sink used water as the working fluid and had 20 parallel channels with dimensions 2 mm × 2 mm × 119 mm. Experiments were run under various operating conditions, and thermal resistance of the PHP was calculated. The performance enhancement provided by the PHP was assessed by comparing the thermal resistance of the heat sink with no working fluid to that of it charged with water. Uncharged, the PHP was found to have a resistance of 1.97 K/W. Charged to a fill ratio of approximately 75% and oriented vertically, the PHP achieved a resistance of .49 K/W and .53 K/W when the condenser temperature was set to 20°C and 30°C, respectively. When the PHP was tilted to 45° above horizontal the PHP had a resistance of .76 K/W and .59 K/W when the condenser was set 20°C and 30°C, respectively. The PHP greatly improves the heat transfer properties of the heat sink compared to the aluminum plate alone. Additional considerations regarding flat plate PHP design are also presented.

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Experimental Study on Applied Thin Vapor Chamber and Embedded Heat Pipe Heat Sinks

ASME 2009 InterPACK Conference, Volume 2 ◽

10.1115/interpack2009-89191 ◽

2009 ◽

Author(s):

Garrett A. Glover ◽

Yongguo Chen ◽

Annie Luo ◽

Herman Chu

Keyword(s):

Heat Pipe ◽

Heat Sink ◽

High Performance ◽

Structural Integrity ◽

Heat Pipes ◽

Electronic Cooling ◽

Working Fluid ◽

Vapor Chamber ◽

Trade Offs ◽

Pipe Heat

The current work is a survey of applied applications of passive 2-phase technologies, such as heat pipe and vapor chamber, in heat sink designs with thin base for electronic cooling. The latest improvements of the technologies and manufacturing processes allow achievable heat sink base thickness of 3 mm as compared to around 5 mm previously. The key technical challenge has been on maintaining structural integrity for adequate hollow space for the working fluid vapor in order to retain high performance while reducing the thickness of the overall vapor chamber or flattened heat pipe. Several designs of thin vapor chamber base heat sink and embedded heat pipe heat sink from different vendors are presented for a moderate power density application of a 60 W, 13.2 mm square heat source. Numerous works have been published by both academia and commercial applications in studying the fundamental science of passive 2-phase flow technologies; their performance has been compared to solid materials, like aluminum and copper. These works have established the merits of using heat pipes and vapor chambers in electronic cooling. The intent of this paper is to provide a methodical approach to help to accelerate the process in evaluating the arrays of different commercial designs of these devices in our product design cycle. In this paper, the trade-offs between the different types of technologies are discussed for parameters such as performance advantages, physical attributes, and some cost considerations. This is a bake-off evaluation of the complete heat sink solutions from the various vendors and not a fundamental research of vapor chambers and heat pipes — for that, it is best left to the vendors and universities.

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Experimental Study of an Airfoil Heat Pipe Subjected to an Impingement of Hot Gases

Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D ◽

10.1115/imece2012-88645 ◽

2012 ◽

Author(s):

Gerardo Carbajal ◽

Alberto Vázquez Ramos

Keyword(s):

Experimental Study ◽

Heat Pipe ◽

Heat Input ◽

Nickel Foam ◽

Average Pore Size ◽

Leading Edge ◽

Jet Impingement ◽

Experimental Result ◽

Working Fluid ◽

Average Pore

An experimental study was performed to an airfoil heat pipe. The airfoil was subjected to a jet impingement of hot gases at the leading edge. The airfoil was also tested first with air and later with water as the working fluid. The experimental result shown that the heat pipe spread better the heat input from the leading edge at very high heat input rate than the air filled airfoil design. The case material was brass, the porous media was nickel foam with 1.70 mm thickness and average pore size of 590 × 10−6 m. Distilled water was used as the working fluid. The experimental data indicate the proposed design can reduce the temperature at the leading edge surface. The temperature reduction in the leading edge airfoil heat pipe was approximately 33 percent compared with the air filled airfoil. The phase change mechanism inside the heat pipe was the key factor to spread better the localized energy input and thus reducing the temperature distribution on the leading edge.

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Experimental study and Taguchi analysis on LED cooling by thermoelectric cooler integrated with microchannel heat sink

Applied Energy ◽

10.1016/j.apenergy.2019.03.071 ◽

2019 ◽

Vol 242 ◽

pp. 232-238 ◽

Cited By ~ 13

Author(s):

Xiaohui Lin ◽

Songping Mo ◽

Lisi Jia ◽

Zhi Yang ◽

Ying Chen ◽

...

Keyword(s):

Experimental Study ◽

Heat Sink ◽

Microchannel Heat Sink ◽

Thermoelectric Cooler ◽

Taguchi Analysis

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The Experimental Study on Magnetic Fluid Flat Plate Heat Pipe as Thermal Spreaders

ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 3 ◽

10.1115/mnhmt2009-18233 ◽

2009 ◽

Author(s):

Ming Zhang ◽

Zhongliang Liu ◽

Chen Wang

Keyword(s):

Experimental Study ◽

Heat Flux ◽

Flat Plate ◽

Heat Pipe ◽

Magnetic Fluid ◽

Working Fluid ◽

Uniform Heat Flux ◽

Plate Heat ◽

Evaporation And Condensation ◽

Flat Plate Heat Pipe

An effective thermal spreader can achieve uniform heat flux distribution and thus enhance heat dissipation of heat sinks. Flat plate heat pipe is one of the highly effective thermal spreaders. Magnetic fluid is a special fluid that can be made flow by traveling force of magnetic field. Therefore, the magnetic fluid is suitable for using as the working fluid of flat plate heat pipes that have a very small gap between evaporation and condensation surfaces. In this paper, we prepared a disk-shaped wickless flat plate heat pipe, and the distance between evaporation and condensation surfaces is 1 mm. From experimental study, the effects of heat flux and working fluid ratio on the performance of the flat plate heat pipe are obtained and the working performance of the magnetic fluid is compared with that of the water flat pate heat pipe of the same geometry structure.

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Experimental Study of Thermoelectric Cooler Box Using Heat Sink with Vapor Chamber as Hot Side Cooling Device

Proceedings of the 2nd International Conference on Experimental and Computational Mechanics in Engineering - Lecture Notes in Mechanical Engineering ◽

10.1007/978-981-16-0736-3_37 ◽

2021 ◽

pp. 389-399

Author(s):

Adi Winarta ◽

I. Made Rasta ◽

I. Nyoman Suamir ◽

I. G. K. Puja

Keyword(s):

Experimental Study ◽

Heat Sink ◽

Thermoelectric Cooler ◽

Vapor Chamber ◽

Cooling Device

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Development of a Compensation Chamber for Use in a Multiple Condenser Loop Heat Pipe

Volume 2: Heat Transfer Enhancement for Practical Applications; Heat and Mass Transfer in Fire and Combustion; Heat Transfer in Multiphase Systems; Heat and Mass Transfer in Biotechnology ◽

10.1115/ht2013-17581 ◽

2013 ◽

Author(s):

Nicholas A. Roche ◽

Martin Cleary ◽

Teresa B. Peters ◽

Evelyn N. Wang ◽

John G. Brisson

Keyword(s):

Heat Pipe ◽

Heat Sink ◽

High Performance ◽

Computational Simulation ◽

Working Fluid ◽

Loop Heat Pipe ◽

Operating Characteristics ◽

Side Pressure ◽

Compensation Chamber ◽

Dry Out

We report the design and analysis of a novel compensation chamber for use in PHUMP, a multiple condenser loop heat pipe (LHP) capable of dissipating 1000 W. The LHP is designed for integration into a high performance air-cooled heat sink to address thermal management challenges in advanced electronic systems. The compensation chamber is integrated into the evaporator of the device and provides a region for volumetric expansion of the working fluid over a range of operating temperatures. Additionally, the compensation chamber serves to set the liquid side pressure of the device, preventing both flooding of the condensers and dry out of the evaporator. The compensation chamber design was achieved through a combination of computational simulation using COMSOL Multiphysics and models developed based on experimental work of previous designs. The compensation chamber was fabricated as part of the evaporator using Copper and Monel sintered wicks with various particle sizes to achieve the desired operating characteristics. Currently, the compensation chamber is being incorporated into a multiple condenser LHP for a high performance air-cooled heat sink.

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