Download or read book An Experimental Study to Evaluate the Modes of Heat Transfer Through Fiberglass Insulation Utilizing the Thermal Conductivity of Aluminum 2024 written by Do-Kong Chang and published by . This book was released on 1983 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Volume of Technical Papers Presented at AIAA IES ASTM Space Simulation Conference Houston Texas September 7 9 1966 written by and published by . This book was released on 1966 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transient Thermal Performance of Multilayer Insulation Systems During Simulated Ascent Pressure Decay written by Irving E. Sumner and published by . This book was released on 1971 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dielectric Properties of Wood and Wood Based Materials written by Grigoriy I. Torgovnikov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provided here is a comprehensive treatise on all aspects of dielectric properties of wood and wood products. The topics covered include: Interaction between electromagnetic field and wood. - Wood composition and dielectric properties of its components. - Measurement of dielectric parameters of wood.- Dielectric properties of oven-dry wood. - Dielectric properties of moist wood. - Effect of different kinds of treatment on dielectric properties of wood. - Dielectric properties of bark. - Dielectric properties of wood-based materials. - Recommendations for determination of dielectric parameters of wood based materials and for their use in calculations. Several appendices comprise reference data onthe dielectric characteristics of wood and wood-based materials in the wide range of frequencies, temperatures, and moisture content.
Download or read book G Plus Report to Owens Corning thermal Conductivity Measurements of Fiberglass written by H. Wang and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiberglass made by Owens Corning is being used in noise reduction of automobile exhaust system. Specifically, the glass fibers are packed inside the muffler to achieve the desired acoustic effect. A secondary benefit of the fibers is to serve as a thermal insulation. Because of this insulating property, the glass fibers can serve to reduce the temperature of the muffler shell. This in turn reduces the need for heat shields around mufflers and reduces the amount of exterior temperature accelerated corrosion of the muffler shell, especially in the winter ''salt belts'' where large amounts of salt are placed on highways to minimize the safety impact of snow and ice. In addition, for some applications the use of the fiberglass could allow the use of lighter weight carbon based polymer composite materials in place of steel for muffler shells. However, in order to properly design exhaust systems without heat shields or to take advantage of new materials, the thermal conductivity of the fiberglass material at operating temperatures (for some applications above 750 C) must be known. We selected two types of Owens Corning glass fibers, 17 {micro}m and 24 {micro}m in diameter, for this study. There are some room temperature thermal conductivity data for the fiberglass, but high temperature data are not available. Based on the thermal radiation model, thermal conductivity should increase rapidly at high temperature, providing less thermal insulation. In addition, thermal conductivity depends on packing density of the glass fibers. We will study the effect of packing density on thermal conductivity. Another issue is that the glass fiber conducts heat better along the fiber, while the conduction across the fibers is poor, because thermal conduction from one fiber to another has to go through an interface with thermal resistance. In fiberglass, most fibers are not in good contact with the surrounding fibers, thus, most heat transfer is dependent on the thermal radiation effect. Among the many methods of measuring thermal conductivity, only a few can be used for glass fibers. The traditional heat flow meter is used in testing thermal insulations near room temperature. At higher temperatures this method cannot be used due to material and instrument limitations. Our plan is to use a transient plane source (TPS) method to measure thermal conductivity directly. The advantage of the TPS method is that measurements can be taken at over 700 C, and covers the temperature of the automobile exhausts. The following is a report for the G-Plus project conducted at ORNL to apply the TPS method to characterizing the thermal conductivity of two types of fiberglass and also the effect of packing density.
Download or read book Non evacuated Cryogenic Thermal Insulation Studies written by C. L. Johnson and published by . This book was released on 1964 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thermal accommodation coefficient was studied for its application to very fine powders, and its probable effect on heat transfer through powders was evaluated. On the basis of the literature survey, a heat-transfer model was devised which depicts heat as being transported by three heat-transfer modes operating independently and in parallel. Experimental data was gathered on the thermal conductivity of a mixture of carbon black and silica powder. Data were collected for several powder mean temperatures and densities, with helium, neon, and nitrogen used as interstitial gases at atmospheric pressure. The heat-transfer model was compared to the experimental data, with good correlation. Analysis of the experimental data showed that the thermal conductivity of a powder is primarily dependent upon the effective gas thermal conductivity, which may be regulated to some extent by the size of the interstitial pore. It was also shown that heat transfer through interparticle contact may be very large if the interstitial gas is adsorbed upon the powder particles. Both the theoretical model and the experimental data indicate that the accommodation coefficient influences heat transport through a powder bed in only a minor way. (Author).
Download or read book An Analytical and Experimental Investigation for an Interstitial Insulation Technology written by Dong Keun Kim and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An insulation technique has been developed which contains a single or combination of materials to help minimize heat loss in actual industrial applications. For the petroleum industry, insulation for deep sea piping is one of the greatest challenges which would prevent the industry from meeting the high demand for oil through exploration into deeper ocean environments. At current seafloor depths (5,000~10,000ft), pipeline insulation is essential in preventing pipeline blockage resulting from the solidification of paraffin waxes and / or hydrate formation which exist in crude oil. To maintain crude oil temperatures above the paraffin solidification point (68°C or 155°F), new and better insulation techniques are essential to minimize pipeline heat loss and maintain crude oil temperatures. Therefore, the objective of this investigation was to determine whether or not the thermal resistance of a new insulation concept, which involves IIT (Interstitial Insulation Technology) with screen wire, was greater than existing readily available commercial products through analytical modeling and experimentation. The model takes into account both conforming and nonconforming interfaces at the wire screen contacts within the interstitial space between coaxial pipes. In addition, confirmation was needed to determine whether or not laboratory testing of simulated coupons translate to thermal performance for a prototype pipe segment that fabricated with two layers of low conductivity wire-screen (stainless steel) as the interstitial insulation material. Both the inner and outer surface temperatures of the coaxial pipes were measured in order to evaluate the effective thermal conductivity and thermal diffusivity of the insulation concept. The predicted results from the model compared very favorably with the experimental results, confirming both the trends and magnitudes of the experimental data. In other words, whether the reduction in heat transfer observed for small laboratory samples was realistic for application to a pipeline configuration. This effort involved both analytical modeling for all thermal resistances and experimental test runs for validation of the analytical model. Finally, it was a goal of this investigation to develop a simplified model for a multilayer composite structure which will include radiation heat transfer exchange among the layers that constitute the insulation. With the developed model, feasibility and performance characteristics of the insulation concept were predicted. The thermal predictions have demonstrated the thermal competitiveness of the interstitial insulation technology.
Download or read book Heat transfer written by Yunus Ali Cengel and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Analysis Thermal Performance Between Copper and Aluminum as Heat Plates and Fins written by Purenutthe Liangosakul and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer is a critical aspect in many industries, including electronics, and automotive. Copper and aluminum are the most commonly used materials for heat plates and fins, but their selection depends on several factors such as cost, thermal conductivity, and weight. This study aims to compare the performance between copper and aluminum as heat plates and fins with simulation and experiment to determine the most cost-effective solution for heat transfer applications. The experiments were conducted under a stress load of 15W and an ambient room temperature of 25 degrees Celsius, with temperature measurements recorded for the CPU. The research involves an experimental setup that measures the temperature and thermal resistance from the CPU, heat plates and fins. The results showed that the copper heat plate with copper fins demonstrated the best thermal performance, with the CPU temperature reaching 85.9 degrees Celsius. The copper heat plate with aluminum fins increase temperature 1%. The aluminum heat plate with copper fins recorded further temperature increases 2%, while the aluminum heat plate with aluminum fins showed the highest temperature reading of 90.5 degrees Celsius or increase 5% from copper heat plate with copper fins temperature. Analyzing the significance of material selection, it was observed that copper, with its excellent thermal conductivity, provided superior heat transfer capabilities. However, the increase in CPU temperature when using aluminum was relative. The results of this study will provide into the thermal performance and cost-effectiveness of copper and aluminum as heat plates and fins and help engineers to make informed decisions in selecting materials for heat transfer applications.
Download or read book University Physics written by Samuel J. Ling and published by . This book was released on 2017-12-19 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt: University Physics is designed for the two- or three-semester calculus-based physics course. The text has been developed to meet the scope and sequence of most university physics courses and provides a foundation for a career in mathematics, science, or engineering. The book provides an important opportunity for students to learn the core concepts of physics and understand how those concepts apply to their lives and to the world around them. Due to the comprehensive nature of the material, we are offering the book in three volumes for flexibility and efficiency. Coverage and Scope Our University Physics textbook adheres to the scope and sequence of most two- and three-semester physics courses nationwide. We have worked to make physics interesting and accessible to students while maintaining the mathematical rigor inherent in the subject. With this objective in mind, the content of this textbook has been developed and arranged to provide a logical progression from fundamental to more advanced concepts, building upon what students have already learned and emphasizing connections between topics and between theory and applications. The goal of each section is to enable students not just to recognize concepts, but to work with them in ways that will be useful in later courses and future careers. The organization and pedagogical features were developed and vetted with feedback from science educators dedicated to the project. VOLUME II Unit 1: Thermodynamics Chapter 1: Temperature and Heat Chapter 2: The Kinetic Theory of Gases Chapter 3: The First Law of Thermodynamics Chapter 4: The Second Law of Thermodynamics Unit 2: Electricity and Magnetism Chapter 5: Electric Charges and Fields Chapter 6: Gauss's Law Chapter 7: Electric Potential Chapter 8: Capacitance Chapter 9: Current and Resistance Chapter 10: Direct-Current Circuits Chapter 11: Magnetic Forces and Fields Chapter 12: Sources of Magnetic Fields Chapter 13: Electromagnetic Induction Chapter 14: Inductance Chapter 15: Alternating-Current Circuits Chapter 16: Electromagnetic Waves
Download or read book Insulating Materials written by Margit Pfundstein and published by Walter de Gruyter. This book was released on 2012-12-10 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Bedeutung von Dämmstoffen ist ungebrochen hoch. Das Angebot steigt kontinuierlich. Durch ihre wärmedämmende Wirkung tragen sie zur Einsparung von Heiz- und Kühlenergie sowie zur Reduktion des CO2-Austoßes bei. Detail Practice Insulating Materials bietet einen umfassenden Katalog von Dämmstoffen für den Hochbau. Erläuterungen zu den einzelnen Dämmstoffarten geben Aufschluss über enthaltene Rohstoffe, typische Eigenschaften, Anwendungsbereiche und Lieferformen. Tabellen mit physikalischen Kennwerten und Angaben zum Brandverhalten sowie Hinweise zur Gesundheits- und Umweltverträglichkeit machen die Dämmstoffe vergleichbar. Ein Überblick über die europäischen Rechtsvorschriften sowie Dämmstoffnormen mit Erläuterungen zur Produktkennzeichnung und -zertifizierung hilft bei der Planung und Ausschreibung. Für die Auswahl des passenden Dämmstoffes werden Kriterien für Konstruktion und Anwendung vorgestellt. Ergänzend hierzu eröffnet die differenzierte Betrachtung der ökologischen Wirkungen von Dämmstoffen ein großes Optimierungspotenzial für ihren nachhaltigen Einsatz.
Download or read book Experimental Study of Heat Transfer from High Temperature Vertical Wires Using Mach Zhender Interferometry written by Hanumantha R. Annamaneni and published by . This book was released on 1996 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Environmental Physics written by John Monteith and published by Butterworth-Heinemann. This book was released on 1990-02-15 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly revised and up-dated edition of a highly successful textbook.
Download or read book Infrared Thermography written by Raghu Prakash and published by BoD – Books on Demand. This book was released on 2012-03-14 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared Thermography (IRT) is commonly as a NDE tool to identify damages and provide remedial action. The fields of application are vast, such as, materials science, life sciences and applied engineering. This book offers a collection of ten chapters with three major sections - relating to application of infrared thermography to study problems in materials science, agriculture, veterinary and sports fields as well as in engineering applications. Both mathematical modeling and experimental aspects of IRT are evenly discussed in this book. It is our sincere hope that the book meets the requirements of researchers in the domain and inspires more researchers to study IRT.
Download or read book Oscillating Heat Pipes written by Hongbin Ma and published by Springer. This book was released on 2015-05-22 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Handbook of Thermal Conductivity of Liquids and Gases written by Natan B. Vargaftik and published by CRC Press. This book was released on 1993-10-25 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Thermal Conductivity of Liquids and Gases covers practically all of the data available on the thermalconductivity of pure liquids and gases. Thermal conductivity data included in the book is based on original experimental measurements and correlations recommended or adopted as a standard by the National Standard Reference Data Service of the Russian Federation. New tabulations of thermal conductivity data on high-molecular organic fluids and the alkali metals in both liquid and gaseous states are featured as well. This book will be an important reference for all researchers working in thermodynamics.
Download or read book Reusable Launch Vehicle written by Committee on Reusable Launch Vehicle Technology and Test Program and published by National Academies Press. This book was released on 1996-01-22 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The key to opening the use of space to private enterprise and to broader public uses lies in reducing the cost of the transportation to space. More routine, affordable access to space will entail aircraft-like quick turnaround and reliable operations. Currently, the space Shuttle is the only reusable launch vehicle, and even parts of it are expendable while other parts require frequent and extensive refurbishment. NASA's highest priority new activity, the Reusable Launch Vehicle program, is directed toward developing technologies to enable a new generation of space launchers, perhaps but not necessarily with single stage to orbit capability. This book assesses whether the technology development, test and analysis programs in propulsion and materials-related technologies are properly constituted to provide the information required to support a December 1996 decision to build the X-33, a technology demonstrator vehicle; and suggest, as appropriate, necessary changes in these programs to ensure that they will support vehicle feasibility goals.
