Xem 1-17 trên 17 kết quả Thermal considerations
  • The outstanding thermal properties of carbon nanotubes (CNTs) have generated considerable interest and research activity. A very promising application is the use of vertically aligned arrays of CNTs as thermal interface materials (TIMs) for electronic systems.

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  • Electrical machines are almost entirely used in producing electricity, and there are very few electricity-producing processes where rotating machines are not used. In such processes, at least auxiliary motors are usually needed. In distributed energy systems, new machine types play a considerable role: for instance, the era of permanent magnet machines has now commenced. About half of all electricity produced globally is used in electric motors, and the share of accurately controlled motor drives applications is increasing.

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  • The design and manufacture of transformers is not cutting edge technology, and compared with many fi elds of engineering, progress is slow and change is gradual. The question might therefore be asked as to what is the need for a new and revised edition of The J & P Transformer Book. It is also true that in many branches of the industry the book has become well known and widely respected, and many owners will not consider replacing their trusted old edition. Indeed, many transformer engineers swear by copies handed down to them from older colleagues.

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  • This book covers various topics, from thermal-hydraulic analysis to the safety analysis of nuclear power plant. It does not focus only on current power plant issues. Instead, it aims to address the challenging ideas that can be implemented in and used for the development of future nuclear power plants. This book will take the readers into the world of innovative research and development of future plants. Find your interests inside this book!Steam Generator

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  • Nanoelectronics is a rapidly expanding field with researchers exploring a very large number of innovative techniques for constructing devices intended to implement high-speed logic or high-density memory. Less common, however, is work intended to examine how to utilize such devices in the construction of a complete computer system. As devices become smaller, it becomes possible to construct ever more complex systems but to do so means that new and challenging problems must be addressed.

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  • In some ways, the uncertainty over supply consistency is really a form of risk management. In the future, both petrochemical supply and renewable supply will carry increased risk. For petrochemicals, further supply uncertainty may arise from political changes in other world areas. For plant-derived materials, weather may be an uncertain factor locally, while specialty plants with less commodity type production may result in more trading uncertainty.

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  • Enormous number of books, reviews and original papers concerning engineering applications of heat transfer has already been published and numerous new publications appear every year due to exceptionally wide list of objects and processes that require to be considered with a view to thermal energy redistribution. All the three mechanisms of heat transfer (conduction, convection and radiation) contribute to energy redistribution, however frequently the dominant mechanism can be singled out.

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  • CHAPTER 58 STEAM TURBINES William G. Steltz Ttarboflow International Inc. Orlando, Florida 58.1 58.2 HISTORICAL BACKGROUND THE HEAT ENGINE AND ENERGY CONVERSION PROCESSES SELECTED STEAM THERMODYNAMIC PROPERTIES BLADEPATHDESIGN 58.4.1 Thermal to Mechanical Energy Conversion 1765 58.4.2 58.4.3 58.4.4 1767 58.4.5 58.4.6 1772 58.4.7 1775 1776 58.4.8 58.3 58.

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  • Ferrante, J. et. al. “Surface Physics in Tribology” Handbook of Micro/Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, 1999 © 1999 by CRC Press LLC Surface Physics in Tribology John Ferrante and Phillip B. Abel 3.1 3.2 3.3 3.4 3.

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  • CHAPTER 4 4 COMBUSTION Richard J. Reed North American Manufacturing Company Cleveland, Ohio 44.1 FUNDAMENTALS OF COMBUSTION 44.1.1 Air-Fuel Ratios 44.1.2 Fuels 44.3 1 3 4 1 1431 1 3 4 3 44.4 44.5 BURNERS 1 3 4 9 44.3.1 Burners for Gaseous Fuels 1439 44.3.2 Burners for Liquid Fuels 1441 SAFETY CONSIDERATIONS OXY-FUEL FIRING 1442 44.2 PURPOSES OF COMBUSTION 1435 1 4 4 7 44.1 FUNDAMENTALS OF COMBUSTION 44.1.1 Air-Fuel Ratios Combustion is rapid oxidation, usually for the purpose of changing chemical energy into thermal energy—heat.

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  • Oueslati and Bennacer Nanoscale Research Letters 2011, 6:222 http://www.nanoscalereslett.com/content/6/1/222 NANO EXPRESS Open Access Heterogeneous nanofluids: natural convection heat transfer enhancement Fakhreddine Segni Oueslati1, Rachid Bennacer2* Abstract Convective heat transfer using different nanofluid types is investigated. The domain is differentially heated and nanofluids are treated as heterogeneous mixtures with weak solutal diffusivity and possible Soret separation.

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  • At $13 billion and roughly five percent of the total semiconductor market (2004 data) the power semiconductor market is big and growing fast, typically outgrowing the rest of the semiconductor market. Modern electronic appliances, while exhibiting increasing functionality, are also expected to consume little power, for reasons of portability, thermal performance, and environmental considerations.

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  • Subduction is a major process that plays a first-order role in the dynamics of the Earth. The sinking of cold lithosphere into the mantle is thought by many authors to be the most important source of energy for plates driving forces. It also deeply modifies the thermal and chemical structure of the mantle, producing arc volcanism and is responsible for the release of most of the seismic energy on Earth. There has been considerable achievements done during the past decades regarding the complex interactions between the various processes acting in subduction zones.

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  • Mixed layers grew to depths of 2,500 to 4,000 meters, with a rapid period of growth beginning shortly before noon and lasting for several hours. Significant differences between the mixed-layer temperatures in the basin and outside the basin were observed. Data analyses and models provide evidence that the circulations are highly complex and that relatively weak upper-level synoptic systems had an impact on the local and regional thermally driven flows in the area.

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  • Shouldn’t it be possible to conceal a house in an Alpine slope while still exploiting the wonderful views and allowing light to enter the building? Surprised that it was permissible to construct a pair of dwellings so close to the world famous thermal baths of Vals, the client seized the opportunity to develop the site, without disturbing the bath’s expansive views. The introduction of a central patio into the steep incline creates a large façade with considerable potential for window openings.

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  • (BQ) Ebook Rules for Certification of Cargo Containers includes Conditions of Certification, Design Review, Materials and Fabrication, Quality Assurance, Definitions, Design Considerations, Tank Containers, Thermal Cargo Containers, Container Surveys.

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  • Water is necessary both for the evolution of life and its continuance. It possesses particular properties that cannot be found in other materials and that are required for lifegiving processes. These properties are brought about by the hydrogen bonded environment particularly evident in liquid water. Each liquid water molecule is involved in about four hydrogen bonds with strengths considerably less than covalent bonds but considerably greater than the natural thermal energy.

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