Download or read book Transient Analysis of a Capillary Pumped Loop Heat Pipe written by A. M. Kiper and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Thermal Fluid Mechanical Characteristics of the Capillary Pump Loop written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose is the experimental and analytical study of behavior of the Capillary Pump Loop (CPL) heat pipe system during the transient mode of operating by applying a step heat pulse to one or more evaporators. Prediction of the CPL behavior when subjected to pulse heat loading requires further study before the transient response of CPL system can be fully understood. The following tasks are discussed: (1) exploratory testing of a CPL heat pipe for transient operational conditions which could generate the type of oscillatory inlet temperature behavior observed in an earlier testing of NASA/GSFC CPL-2 heat pipe system; (2) analytical investigation of the CPL inlet section temperature oscillations; (3) design, construction and testing of a bench-top CPL test system for study of the CPL transient operation; and (4) transient analysis of a CPL heat pipe by applying a step power input to the evaporators. Kiper, Ali M. Unspecified Center...

Download or read book Numerical Simulation of Heat Exchangers written by W. J. Minkowycz and published by CRC Press. This book was released on 2017-04-07 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with certain aspects of material science, particularly with the release of thermal energy associated with bond breaking. It clearly establishes the connection between heat transfer rates and product quality. The editors then sharply draw the thermal distinctions between the various categories of welding processes, and demonstrate how these distinctions are translated into simulation model uniqueness. The book discusses the incorporation of radiative heat transfer processes into the simulation model.

Download or read book Heat Pipes and Capillary Pumped Loops written by Amir Faghri and published by . This book was released on 1993 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design And Technology Of Heat Pipes For Cooling And Heat Exchange written by Cal Silverstein and published by CRC Press. This book was released on 2020-03-13 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the characteristics of heat pipes under steady-state and transient operating conditions. It emphasizes the physical aspects of heat pipe behavior and develops design formulas on the basis of mathematical models and empirical observation. The author take a tutorial approach, presenting information on the application of heat pipe technology, design methods, and data to heat pipe cooling and heat exchange requirements. He provides the nonspecialist with sufficient understanding of heat pipe technology to appreciate and assess its application potential, while also meeting the needs of the experienced heat pipe designer and researcher.

Download or read book Heat Pipe Science And Technology written by Amir Faghri and published by Global Digital Press. This book was released on 1995-03 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Heat Analysis and Thermodynamic Effects written by Amimul Ahsan and published by IntechOpen. This book was released on 2011-09-22 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The heat transfer and analysis on heat pipe and exchanger, and thermal stress are significant issues in a design of wide range of industrial processes and devices. This book includes 17 advanced and revised contributions, and it covers mainly (1) thermodynamic effects and thermal stress, (2) heat pipe and exchanger, (3) gas flow and oxidation, and (4) heat analysis. The first section introduces spontaneous heat flow, thermodynamic effect of groundwater, stress on vertical cylindrical vessel, transient temperature fields, principles of thermoelectric conversion, and transformer performances. The second section covers thermosyphon heat pipe, shell and tube heat exchangers, heat transfer in bundles of transversely-finned tubes, fired heaters for petroleum refineries, and heat exchangers of irreversible power cycles. The third section includes gas flow over a cylinder, gas-solid flow applications, oxidation exposure, effects of buoyancy, and application of energy and thermal performance index on energy efficiency. The forth section presents integral transform and green function methods, micro capillary pumped loop, influence of polyisobutylene additions, synthesis of novel materials, and materials for electromagnetic launchers. The advanced ideas and information described here will be fruitful for the readers to find a sustainable solution in an industrialized society.

Download or read book Design And Technology Of Heat Pipes For Cooling And Heat Exchange written by Cal Silverstein and published by CRC Press. This book was released on 2020-03-13 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the characteristics of heat pipes under steady-state and transient operating conditions. It emphasizes the physical aspects of heat pipe behavior and develops design formulas on the basis of mathematical models and empirical observation. The author take a tutorial approach, presenting information on the application of heat pipe technology, design methods, and data to heat pipe cooling and heat exchange requirements. He provides the nonspecialist with sufficient understanding of heat pipe technology to appreciate and assess its application potential, while also meeting the needs of the experienced heat pipe designer and researcher.

Download or read book Hptam a Two Dimensional Heat Pipe Transient Analysis Model Including the Startup from a Frozen State written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-dimensional Heat Pipe Transient Analysis Model, 'HPTAM, ' was developed to simulate the transient operation of fully-thawed heat pipes and the startup of heat pipes from a frozen state. The model incorporates: (a) sublimation and resolidification of working fluid; (b) melting and freezing of the working fluid in the porous wick; (c) evaporation of thawed working fluid and condensation as a thin liquid film on a frozen substrate; (d) free-molecule, transition, and continuum vapor flow regimes, using the Dusty Gas Model; (e) liquid flow and heat transfer in the porous wick; and (f) thermal and hydrodynamic couplings of phases at their respective interfaces. HPTAM predicts the radius of curvature of the liquid meniscus at the liquid-vapor interface and the radial location of the working fluid level (liquid or solid) in the wick. It also includes the transverse momentum jump condition (capillary relationship of Pascal) at the liquid-vapor interface and geometrically relates the radius of curvature of the liquid meniscus to the volume fraction of vapor in the wick. The present model predicts the capillary limit and partial liquid recess (dryout) in the evaporator wick, and incorporates a liquid pooling submodel, which simulates accumulation of the excess liquid in the vapor core at the condenser end. Tournier, Jean-Michel and El-Genk, Mohamed S. Unspecified Center NASA-CR-199553, NAS 1.26:199553, UNM-ISNPS-4-1995 NAG3-941..

Download or read book Heat Pipes written by Hussam Jouhara and published by Butterworth-Heinemann. This book was released on 2023-10-27 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat Pipes: Theory, Design and Applications, Seventh 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. The expanded author team consolidate and update the theoretical background included in previous editions, and include new sections on recent developments in manufacturing methods, wick design and additional applications. The book serves as an introduction to the theory, design and application of the range of passive, two-phase, heat-transfer devices known as heat pipes, serving as an essential reference for those seeking a sound understanding of the principles of heat pipe technology. It provides an introduction to the basic principles of operation and design data which would permit the reader to design and fabricate a basic heat pipe. It also provides details of the various more complex configurations and designs currently available to assist in selecting such devices.This new edition has been fully updated to reflect the latest research and technologies and includes four brand new chapters on various types of heat pipe, theoretical principles of heat transfer and fluid mechanics, additive manufacturing and heat pipe heat exchangers. Fully revised with brand new chapters on Additive Manufacturing and Heat Exchangers Guides the reader through the design and fabrication of a heat pipe Includes detail on more complex configurations and designs available to assist in the election of devices

Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Conception of a Gas loaded Variable Conductance Capillary Pumped Loop written by Valeri V. Vlassov and published by . This book was released on 1997 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Theoretical Studies of Capillary Pumped Loop Heat Pipes written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-31 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of capillary-pumped loop (CPL) head pipes with single and multiple evaporators designed to develop and validate a computer model to predict the performance of CPL heat pipes over a wide range of conditions is discussed. The results of a literature search and review and a numerical study to determine the effects of geometric design parameters on the CPL heat pipe pressure drop and heat transfer characteristics are described. Vapor groove geometry and the use of circular versus rectangular evaporators were studied. Obot, N. T. NASA-CR-196408, NAS 1.26:196408 NAG5-2471...

Download or read book Analysis of the Transient Compressible Vapor Flow in Heat Pipe written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transient compressible one-dimensional vapor flow dynamics in a heat pipe is modeled. The numerical results are obtained by using the implicit non-iterative Beam-Warming finite difference method. The model is tested for simulated heat pipe vapor flow and actual flow in cylindrical heat pipes. A good comparison of the present transient results for the simulated heat pipe vapor flow with the previous results of a two-dimensional numerical model is achieved and the steady state results are in agreement with the existing experimental data. The transient behavior of the vapor flow under subsonic, sonic, and supersonic speeds and high mass flow rates are successfully predicted. The one-dimensional model also describes the vapor flow dynamics in cylindrical heat pipes at high temperatures. Jang, Jong Hoon and Faghri, Amir and Chang, Won Soon Unspecified Center NASA-CR-185119, E-4945, NAS 1.26:185119 F33615-88-C-2820; RTOP 586-01-21...

Download or read book Analysis of Transient and Start Up Behavior of Heat Pipes and an Energy Storage Module written by Amir Faghri and published by . This book was released on 1990 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this report is to examine the steady, transient, and start-up behavior of heat pipes as well as a transient analysis related to a thermal energy storage module. A detailed experimental and numerical analysis of low temperature heat pipes with multiple heat sources is also performed. The performance of a thermal energy module is simulated numerically. The change of phase of the phase-change material (PCM) and transient forced convective heat transfer for the transfer fluid with a low Prandtl number are solved simultaneously as a conjugate problem. The start-up process of a frozen heat pipe is described and a complete model for the start-up of the frozen heat pipe is developed based on the existing experimental data, which is simplified and solved numerically. Finally, a unique and efficient transient two-dimensional compressible analysis of high temperature heat pipes with a pulsed heat input is given. Keywords: Heat pipes; Phase changes; Reactor start up sources; Storage modules; Mathematical models. (cp).

Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1993 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: