Composite heat pipe development status

development of lightweight prototype carbon-carbon heat pipe with integral fins and metal foil liner

Publisher: National Aeronautics and Space Administration, Publisher: National Technical Information Service, distributor in [Washington, D.C.], [Springfield, VA

Written in English
Published: Downloads: 480
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Subjects:

  • Carbon-carbon composites.,
  • Design analysis.,
  • Heat pipes.,
  • Linings.,
  • Metal foils.,
  • Spacecraft radiators.,
  • Particle production.

Edition Notes

Other titlesDevelopment of lightweight prototype carbon-carbon heat pipe with integral fins and metal foil liner.
StatementAlbert J. Juhasz and Richard D. Rovang.
SeriesNASA technical memorandum -- 106909.
ContributionsRovang, Richard D., United States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL15413476M

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Composite heat pipe development status Download PDF EPUB FB2

Heat Pipes, 6th Edition, takes a highly practical approach to the design and selection of heat pipes, making it an essential guide for practicing Composite heat pipe development status book 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 5/5(2).

Composite heat pipe development status: Development of lightweight prototype carbon-carbon heat pipe with integral fins and metal foil liner.

By Richard D. Rovang and Albert J. Juhasz. Steady-state heat pipe input power during testing was facility limited to about watts. Post test inspection showed the heat pipe to be in excellent Author: Richard D. Rovang and Albert J. Juhasz. This report discusses development and proof-of-concept testing of a new lightweight carbon-carbon (C-C) space radiator heat pipe, carried out under the NASA Civil Space Technology Initiative (CSTI) High Capacity Power Program.

The prototype heat pipe, equipped with a niobium-zirconium foil liner, was filled with potassium working fluid and tested for 11 hours, including startup Cited by: 9. 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 illustrations, along with numerous references and a wide.

To increase the maximum heat transfer rate of the heat pipes there has been the idea to have heat pipes with more than two kinds of wicks, so called composite wich heat pipe. Marcus () showed various types of composite wick heat pipes.

Examples of composite and non-composite wick heat pipes are shown in Fig. : T. Ogushi, Y. Sakurai. 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 illustrations, along with numerous refere Presents basic and advanced techniques in the analytical and numerical modeling of various heat pipe systems under a variety of 5/5(2).

Heat Pipes, 6th 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. General heat pipe structure 8 3.

Static condition 10 k. Start-up 12 5. Steady-state heat pipe regime Ik 6. Solution of the steady-state equations 2k 7. Maximum heat flux 28 8. Multi-component fluids 31 9. optimal heat pipes 33 References 36 Figures 1. Cylindrical Heat Pipe Structure 37 2.

Distribution of Pressures in a Heat Pipe 37   (b) Limitations to heat transport in a heat pipe N. Narendra Babu and H.C. Kamath / Materials Today: Proceedings 2 () – Heat Pipe Life Enhancement Longevity of a heat pipe can be assured by selecting a container, a Composite heat pipe development status book and welding materials that are compatible with one another and with the working fluid of interest.

way to think about we shall explain the flow of heat in terms more satisfactory to the modern ear; however, it will seldom be wrong to imagine caloric flowing from a hot body to a cold one. The flow of heat is is active to some degree or another in flows constantly from your bloodstream to the air.

Your complete resource on heat pipe operation, behavior, performance characteristics, and limitations. This book is designed to help students, operations engineers, and mechanical and electrical engineers in the electronic packaging industry grasp the principles of operation for a wide range of heat : G.

Peterson. research and development for new heat pipes such as loop heat pipes, micro and miniature heat pipes, and pulsating heat pipes, has matured enough for use in various applications. There is a wealth of published literature: several heat pipe books and monographs, as well as the proceedings of international heat eleven pipe symposiums and eventeen.

Comparative Study of Heat Pipes Performances in Different Orientations CK Loh, Enisa Harris and DJ Chou Enertron, Inc W. Hoover Ave, Suite 5 Mesa, Arizona () Email: [email protected] Abstract The orientation of a heat pipe plays an important role in its performance.

The performance of a heat pipe under specific. Development of Heat Pipe Assemblies for Composite Molds Cameron Emory Updates Molds for composite part production have been increasing in size and complexity and this has caused challenges with the curing process, both in-autoclave and out-of-autoclave.

the successful development of this technology will be used to significantlyreduce the weight and improve the strength of future space thermal management equipment. the technical feasibility of the proposed phase i program will be demonstrated through the design, fabrication and test of a proof-of-principle composite heat pipe.

There are numerous methods for fabricating composite components. Some methods have been borrowed (injection molding from the plastic industry, for example), but many were developed to meet specific design or manufacturing challenges faced with fiber-reinforced polymers.

Selection of a method for a particular part, therefore, will depend on the materials, the part design and end-use or. Heat pipes are passive, two-phased heat transfer devices, using liquid to vapor phase transition to provide minimal temperature rise across their length.

A typical copper water heat pipe will operate with a two to five degree temperature difference. And that rule of thumb is a general basis for a lot of the modeling we’ll dive into later.

pipes were initially at °C temperature. The heat pipe temperature reaches the water temperature in about 25 seconds, while the copper rod reaches just 30°C after seconds. However, in an actual application when a heat pipe is soldered or epoxied to the base of a heat sink, the effective thermal conductivity of the heat pipe may be.

Advanced Composite Material for Aerospace Application-a Review. Mohammad Arif, Dr. Mohammad Asif, and Ahmed. Mechanical Engineering Department, OPJS University, Rajasthan. Abstract. For the Aerospace Engineering there are huge progress of material science and engineering with the technological challenges in terms of the development of.

A heat pipe is a heat-transfer device that combines the principles of both thermal conductivity and phase transition to effectively transfer heat between two solid interfaces. At the hot interface of a heat pipe, a liquid in contact with a thermally conductive solid surface turns into a vapor by absorbing heat from that surface.

The vapor then travels along the heat pipe to the cold interface. Heat Pipes, 6th 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.

Minus the NASA advancements, the development for commercial applications of heat pipes progressed at a much slower pace. InRCA developed a heat pipe heat sink for transistors used in aircraft transmitters.

This represented the first commercial application of heat pipes. These studies have demonstrated that when composite repair systems are designed and installed correctly, they can restore a pipeline’s structural integrity for a wide range of anomalies and applications—even to an extent that the performance level of the damaged pipe is equal to that of the original pipe.

Composite wicks (Table 2), however, can significantly increase the capillary limit of the heat pipe, but have the drawback of high manufacturing costs. When selecting a wick structure for a particular application, one must keep in mind the benefits and drawbacks of each type of wick.

and mm in length (micro heat pipe) and as large as of about m in length used in km trans - Alaska pipe line system. Grover’s suggestion was taken up by NASA, which played a large role in heat pipe development in the s, particularly regarding applications and reliability in space flight.

This was unders. Bakelite was patented on December 7, The creation of a synthetic plastic was revolutionary for its electrical nonconductivity and heat-resistant properties in electrical insulators, radio and telephone casings and such diverse products as kitchenware, jewelry, pipe stems, children's toys, and firearms.

American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA This paper describes an experimental study of heat transfer characteristics in a cylindrical gravity-assisted heat pipe with an organic working fluid.

External coolant loops are used for heating and the overall heat transfer coefficient is given for a temperature range from 25 to 45/sup 0/C and for radial that fluxes from around to W. A thermoplastic pipe, serving as only one component of a pipe/soil composite structure, benefits by its attribute of stress relaxation wherein stresses (forces) are shed and transferred to the soil.

Predictability of performance of a pipe in service (stress, strain and deformation responses, stability) requires knowledge of the. By George Meyer, Celsia Inc. Introduction. This article is intended to offer design guidance when using heat pipes for the most prevalent types of electronics applications: mobile to embedded computing and server type applications with power dissipation ranging from 15 W to W using processor die sizes between 10 mm and 30 mm square.

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. In the past 20 years I have been involved with Airborne in the development of the thermoplastic composite pipe technology.

It sounds like a long time, but it .Search the world's most comprehensive index of full-text books. My library.