2 edition of study of pulsating heat pipes for electronics cooling applications found in the catalog.
study of pulsating heat pipes for electronics cooling applications
Written in English
A trend towards increasingly dense and compact architectures has led to unmanageably high heat fluxes in electronic components. Pulsating heat pipes made out of multi port extrusion tubing are a proposed solution. In this study four pulsating heat pipes were fabricated with unique combinations of geometric parameters. The fabricated heat pipes were tested with a range of fill ratios using two different working fluids. Performance at varying heat input, and orientation was measured. Experimental results of testing found that the channel geometry, presence of a loop, working fluid properties, fill ratio and heat input were interrelated in influencing the effectiveness of the heat pipe. The low material cost, inherently low maintenance, low thermal resistance, and ability to tailor the properties of a heat pipe to the needs of a given application have led to the conclusion that the pulsating heat pipe would be an effective assistant in electronics cooling.
|The Physical Object|
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Heat Pipes in Electronics Cooling (2) Pulsating Heat Pipes Introduction Conventional heat pipe technology has been successfully applied in the last thirty years for the thermal management of a variety of applications like heat exchangers, economizers, space applications, and . The interest in the use of heat pipes for thermal management of electronic components is recognized for both aerospace and terrestrial applications, especially with increasing heat flux requirements. In many applications, heat pipes are circular and are used to transport heat from one single heat source to one single heat sink. Flat.
Set IV is a new addition to the previous Sets I, II and III. It contains 23 invited chapters from international specialists on the topics of numerical modeling of pulsating heat pipes and of slug flows with evaporation; lattice Boltzmann modeling of pool boiling; fundamentals of boiling in microchannels and microfin tubes, CO2 and nanofluids; testing and modeling of micro-two-phase cooling Manufacturer: World Scientific Publishing Company. Pulsating heat pipes (PHPs) are devices that their performance strongly depends on many factors such as filling ratio, working fluid, internal diameter, and etc. Therefore, variety of such parameters must be considered in experimental data or an accurate model must be used to Cited by: 3.
The heat pipes transport heat away from the obstructions and constraints of neighboring boards to where it can be conveniently dissipated. The ability of the heat pipe to be formed to meet location and space availability permits the heat pipe heat sink system to provide the maximum effective heat sink surface area with the minimum volume demand. Pulsating heat pipes present a strong contrasting case in which desirable effects of thermally induced two-phase flow instabilities are harnessed for heat transfer augmentation. Presently such systems have found niche applications in micro-/power electronics cooling File Size: KB.
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An Introduction to Pulsating Heat Pipes May 1, Sameer Khandekar Heat Pipes Design, liquid cooling, Number 2, PHP, Pulsating Heat Pipe, Volume 9 Modern electronics thermal management faces considerable challenges in the wake of component miniaturization, which has led to higher demands on net heat flux dissipation.
Heat Pipe Electronic Cooling Applications: Perhaps the best way to demonstrate the heat pipes application toelectronics cooling is to present a few of the more common examples. Currently,one of the highest volume applications for heat pipes is cooling the Pentiumprocessors in notebook computers.
Pulsating heat pipes (PHPs), which were proposed by Akachi in the s, showed great potential on electronics cooling, heat exchange, and heat recovery applications. Relative to conventional wicked heat pipes, PHPs show advantages such as high heat transport capability, gravity independence, wickless structures and design flexibility [7 Cited by: 7.
Container materials • Of the many materials available for the container, three are by far the most common in use- copper, aluminum, and stainless steel. • Copper is eminently satisfactory for heat pipes operating between 0– C in applications such as electronics cooling. Oscillating Heat Pipes – textbook by Dr.
Hongbin Ma. CCA Heat Sinks Embedded with Oscillating Heat Pipes – article featured in Electronics Cooling. Company Brochure. Air Force, small business develop technologies that help electronics stay cool – article featured in Air Force SBIR STTR AdvantageLocation: Paris Road Columbia, MO, United States.
The pulsating heat pipes are made of a copper capillary tube using acetone as working fluid with a filling ratio of The electric power input was varied from 30 W to W. The book covers thermodynamic analysis, interfacial phenomenon, thin film evaporation, theoretical models of oscillating motion and heat transfer of single phase and two-phase flows, primary factors affecting oscillating motions and heat transfer, neutron imaging study of oscillating motions in an oscillating heat pipes, and nanofluid’s.
Introduction. Heat pipes are efficient cooling apparatuses which are widely developed in recent years for various purposes and applications such as cooling blades of turbines, water heating systems and solar are several types of heat pipes including rotating heat pipes, wick heat pipes, thermosiphons and pulsating heat pipes.Cited by: This paper discusses a pulsating heat pipe (PHP) using a self-rewetting fluid.
Unlike other common liquids, self-rewetting fluids have the property that the surface tension increases with temperature. This paper investigates the performance of a novel open loop pulsating heat pipe embedded in an FR4 organic substrate. The heat pipe is comprised of 26 parallel minichannels, 13 turns with an average hydraulic diameter of mm and maximum surface roughness of μ by: 5.
A heat pipe can find its applications in many sectors of industries, including electronics cooling, energy systems, spacecraft thermal control, permafrost cooling, and manufacturing.
This book presents current research and development related to the design, applications and technology of various heat pipes, including conventional heat pipes and. It’s the two phase heat transfer device suitable for low power applications such as electronic cooling. Even the name is heat pipe,but working is very much different than the conventional heat pipes.
It has capillary which has many bends (capillar. capability of conventional metallic heat sinks. One solution to remove excess heat is by utilization of heat pipes which are employed to remove the excess heat by directly attaching them to the heat source. The Oscillating or Pulsating Heat Pipe (PHP) is another promising heat transfer device for applications like electronic cabinet cooling File Size: 1MB.
For comparison, advanced heat pipes used for spatial applications have heat transfer capacity (measured in W∙m) order of value smaller. The heat transfer capacity of the conventional heat pipes used for cooling of microelectronic devices like laptop computers is 2 to 3 orders of value smaller than that of PHPs.
Heat Pipes. Round and Flat Copper Heat Pipes. Advanced Thermal Solutions Inc. ATS now offers a comprehensive selection of high performance round and flat copper heat pipes. These low profile heat pipes are designed to transfer heat with minimal temperature difference or spread the heat across a surface in electronics cooling applications.
Pulsating Heat Pipe for Air Conditioning System: an Experimental Study (IJSRD/Vol. 4/Issue 02//) C. Cooling Fan Two cooling fans are. What Are Heat Pipes. Hello and thank you for joining Advanced Cooling Technologies for this lesson on heat pipe basics.
A heat pipe is sealed under vacuum with a small, prescribed amount of working fluid. During non-operation, the fluid is contained inside the wick structure that lines the inner diameter of.
Pulsating heat pipes (PHPs) have already found some applications in cooling power / micro electronic components. It was investigated whether a flat plate closed loop pulsating heat pipe can be applied for power electronics cooling.
The measured thermal resistances were strongly influenced by the tilt angle, fill rate and working fluid. The best PHP performance was observed with fill rates. This paper presents an experimental study of Pulsating Heat Pipes (PHP), having potential applications in microelectronics thermal management .
The PHP is made of 10 parallel glass tubes (ID: 2 mm, OD: mm, mm long) forming the adiabatic section, interconnected alternately by. Heat pipes are used in a wide range of applications, including electronics cooling, die-casting and injection moulding, heat recovery and energy conservation, de-icing and manufacturing process temperature control, and in domestic appliances.
An essential guide for practicing engineers and an ideal text for postgraduate students, the book takes a highly practical approach to the design and.
life/usefulness expected of the electronics heat pipes are intended to cool . Future Application: Wicked heat pipes are currently used in a wide range of microelectronic markets, ranging from high-end workstation applications to power electronic cooling applications.
Heat pipe assisted heat sink systems.A typical heat pipe consists of a sealed pipe or tube made of a material that is compatible with the working fluid such as copper for water heat pipes, or aluminium for ammonia heat pipes.
Typically, a vacuum pump is used to remove the air from the empty heat pipe. The heat pipe is partially filled with a working fluid and then sealed. The working fluid mass is chosen so that the heat pipe. This paper reports a micro-pulsating heat pipe (micro-PHP) fabricated in a silicon wafer that consists of trapezoidal microchannels with a hydraulic diameter of μm for electronic cooling applications.
Electronic liquid FC was used as the working fluid. To evaluate the maximum temperature reduction of the evaporator wall, experimental results of the vertical and horizontal Cited by: 3.