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Oscillating Heat Pipes

Oscillating Heat Pipes
Author: Hongbin Ma
Publisher: Springer
Total Pages: 441
Release: 2015-05-22
Genre: Science
ISBN: 1493925040

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This book presents the fundamental fluid flow and heat transfer principles occurring in oscillating heat pipes and also provides updated developments and recent innovations in research and applications of heat pipes. Starting with fundamental presentation of heat pipes, the focus is on oscillating motions and its heat transfer enhancement in a two-phase heat transfer system. 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 effect on the heat transfer performance in oscillating heat pipes. The importance of thermally-excited oscillating motion combined with phase change heat transfer to a wide variety of applications is emphasized. This book is an essential resource and learning tool for senior undergraduate, graduate students, practicing engineers, researchers, and scientists working in the area of heat pipes. This book also · Includes detailed descriptions on how an oscillating heat pipe is fabricated, tested, and utilized · Covers fundamentals of oscillating flow and heat transfer in an oscillating heat pipe · Provides general presentation of conventional heat pipes


Oscillating Heat Pipes

Oscillating Heat Pipes
Author: Hongbin Ma
Publisher: Springer
Total Pages: 0
Release: 2016-10-09
Genre: Science
ISBN: 9781493945238

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This book presents the fundamental fluid flow and heat transfer principles occurring in oscillating heat pipes and also provides updated developments and recent innovations in research and applications of heat pipes. Starting with fundamental presentation of heat pipes, the focus is on oscillating motions and its heat transfer enhancement in a two-phase heat transfer system. 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 effect on the heat transfer performance in oscillating heat pipes. The importance of thermally-excited oscillating motion combined with phase change heat transfer to a wide variety of applications is emphasized. This book is an essential resource and learning tool for senior undergraduate, graduate students, practicing engineers, researchers, and scientists working in the area of heat pipes. This book also · Includes detailed descriptions on how an oscillating heat pipe is fabricated, tested, and utilized · Covers fundamentals of oscillating flow and heat transfer in an oscillating heat pipe · Provides general presentation of conventional heat pipes


Encyclopedia of Two-Phase Heat Transfer and Flow IV

Encyclopedia of Two-Phase Heat Transfer and Flow IV
Author: John R Thome
Publisher: World Scientific Publishing
Total Pages: 1372
Release: 2018-05-18
Genre: Technology & Engineering
ISBN: 9813234385

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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 systems for electronics; and various special topics (flow separation in microfluidics, two-phase sensors, wetting of anisotropic surfaces, ultra-compact heat exchangers, etc.). The invited authors are leading university researchers and well-known engineers from leading corporate research laboratories (ABB, IBM, Nokia Bell Labs). Numerous 'must read' chapters are also included here for the two-phase community. Set IV constitutes a 'must have' engineering and research reference together with previous Sets I, II and III for thermal engineering researchers and practitioners.


Heat Pipes

Heat Pipes
Author: David Reay
Publisher: Butterworth-Heinemann
Total Pages: 280
Release: 2013-10-01
Genre: Technology & Engineering
ISBN: 0080982794

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Heat Pipes, Sixth Edition, takes a highly practical approach to the design and selection of heat pipes, making it an essential guide for practicing engineers and an ideal text for postgraduate students.This new edition has been revised to include new information on the underlying theory of heat pipes and heat transfer, and features fully updated applications, new data sections, and updated chapters on design and electronics cooling. The book is a useful reference for those with experience and an accessible introduction for those approaching the topic for the first time. Contains all information required to design and manufacture a heat pipe Suitable for use as a professional reference and graduate text Revised with greater coverage of key electronic cooling applications


Design Configurations and Operating Limitations of an Oscillating Heat Pipe

Design Configurations and Operating Limitations of an Oscillating Heat Pipe
Author: Omar Talal Ibrahim
Publisher:
Total Pages: 81
Release: 2017
Genre:
ISBN:

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Passive and compact heat dissipation systems are and will remain vital for the successful operation of modern electronic systems. Oscillating heat pipes (OHPs) have been a part of this research area since their inception due to their ability to passively manage high heat fluxes. In the current investigation, different designs of tubular, flat plate, and multiple layer oscillating heat pipes are studied by using different operating parameters to investigate the operating limitations of each design. Furthermore, selective laser melting was demonstrated as a new OHP manufacturing technique and was used to create a compact multiple layer flat plate OHP. A 7-turn tubular oscillating heat pipe (T-OHP) was created and tested experimentally with three working fluids (water, acetone, and n-pentane) and different orientations (horizontal, vertical top heating, and vertical bottom heating). For vertical, TOHP was tested with the condenser at 0°, 45° and 90° bend angle from the y-axis (achieved by bending the OHP in the adiabatic) in both bottom and top heating modes. The results show that T-OHP thermal performance depends on the bend angle, working fluid, and orientation. Another design of L-shape closed loop square microchannel (750 x 750 microns) copper heat pipe was fabricated from copper to create a thermal connector with thermal resistance


Heat Pipe Science And Technology

Heat Pipe Science And Technology
Author: Amir Faghri
Publisher: Global Digital Press
Total Pages: 32
Release: 1995-03
Genre: Science
ISBN: 1560323833

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Presents basic and advanced techniques in the analytical and numerical modeling of various heat pipe systems under a variety of operating conditions and limitations. It describes the variety of complex and coupled processes of heat and mass transfer in heat pipes. The book consists of fourteen chapters, two appendices, and over 400 illustrations, along with numerous references and a wide variety of technical data on heat pipes.


Experimental Investigation of Oscillating Heat Pipes

Experimental Investigation of Oscillating Heat Pipes
Author: Fritz Laun (Thermal aerospace engineer)
Publisher:
Total Pages: 21
Release: 2013
Genre: Electronic dissertations
ISBN:

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With ever increasing technological advances in electronics, modern computer components continue to produce higher power densities that present a challenge to thermal management. A radial flat-plate oscillating heat pipe (RFP-OHP) heat spreader is investigated to study the effect of central heating on the heat transport capability in an OHP. The investigated OHP has dimensions of 100 mm x 100 mm x 2.5 mm with central heating using a 30 mm x 30 mm heater. Experimental results show that when heat is added to the center section of one side of the radial flat-plate OHP, and when heat is removed from the whole surface of another side of the heat pipe, the startup power for the oscillating motion increases. In addition, the spacer effect on the heat transport capability including the startup is investigated experimentally. The spacer added between the cooling block and OHP could lower the startup power for oscillatory motion. When compared to a copper slab of the same dimensions in the same test configuration, the temperature difference for the OHP with and without the additional copper spacer was reduced by a maximum of 46 and 25%, respectively, at a power input of 525 W and a heat flux of 58 W/cm2.


Enhanced Boiling Heat Transfer

Enhanced Boiling Heat Transfer
Author: John R. Thome
Publisher: CRC Press
Total Pages: 220
Release: 1990-01-01
Genre: Technology & Engineering
ISBN: 9780891167457

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This is a comprehensive survey of boiling heat transfer augmentation, one of the most dynamic areas in the field. The text covers fundamental aspects of boiling augmentation and provides an in-depth treatment of enhanced boiling surface applications in industry.


Investigation of a Flat Plate Oscillating Heat Pipe as a Thermal Spreader with Centered Heating

Investigation of a Flat Plate Oscillating Heat Pipe as a Thermal Spreader with Centered Heating
Author: Aaron T. Johnson
Publisher:
Total Pages: 72
Release: 2015
Genre:
ISBN:

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As current electronics technology advances and becomes miniaturized, heat production, and thus heat removal, becomes more complicated. One approach being researched that shows much promise is a flat plate oscillating heat pipe. Flat Plate Oscillating Heat Pipes (Pulsating heat pipes) have been researched since being patented in 1990. Two types have been designated as either closed or open loop. Flat Plate Oscillating heat pipes are a closed loop design. Simple knowledge such as the thermal resistance and thermal conductivity of these devices are usually well documented. Primarily, investigations have been done on an axial basis. The purpose of this investigation was the use of a flat plate oscillating heat pipe as a thermal spreader in horizontal orientation with centered bottom heating mode. Additionally, the existing mathematical models for flat plate oscillating heat pipes are complex and seek to describe how the heat pipe functions internally. A new approach from an external perspective is used. The new approach is to calculate thermal and spreading resistance. From the calculated resistance, the average temperature distribution on the heat removal surface is predicted. Assumptions need to be made in order to use this approach, including a k value and heat removal conditions. Existing and new experimental data have been compared to and found to give relatively accurate results.


Heat Pipe Design and Technology

Heat Pipe Design and Technology
Author: Bahman Zohuri
Publisher: Springer
Total Pages: 539
Release: 2016-04-28
Genre: Technology & Engineering
ISBN: 3319298410

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This book provides a practical study of modern heat pipe engineering, discussing how it can be optimized for use on a wider scale. An introduction to operational and design principles, this book offers a review of heat and mass transfer theory relevant to performance, leading into and exploration of the use of heat pipes, particularly in high-heat flux applications and in situations in which there is any combination of non-uniform heat loading, limited airflow over the heat generating components, and space or weight constraints. Key implementation challenges are tackled, including load-balancing, materials characteristics, operating temperature ranges, thermal resistance, and operating orientation. With its presentation of mathematical models to calculate heat transfer limitations and temperature gradient of both high- and low-temperature heat pipes, the book compares calculated results with the available experimental data. It also includes a series of computer programs developed by the author to support presented data, aid design, and predict performance.