Thermal management

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Intensified thermal management for patients undergoing transcatheter aortic valve implantation (TAVI)...

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  • Revised to cover the latest innovations and trends, the newest edition of this classic work provides detailed coverage of every component of effective energy management. It includes expert information on, boilers, steam systems, cogeneration, waste-heat recovery, HVAC systems, control systems, systems maintenance, industrial insulation, indoor air quality, thermal energy storage, and codes and standards.

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  • Metal foams are a new, as yet imperfectly characterized, class of materials with low densities and novel physical, mechanical, thermal, electrical and acoustic properties. They offer potential for lightweight structures, for energy absorption, and for thermal management; and some of them, at least, are cheap. The current understanding of their production, properties and uses in assembled in this Design Guide.

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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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  • The inspiration for Building Systems for Interior Designers came when I tried to teach interior design students about all the ways buildings support our activities and physical needs—without an adequate textbook. I needed an approach that supported the special concerns of the interior designer, while connecting those issues to the work of the rest of the building design team.

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  • This book provides some recent advances in design nanometer VLSI chips. The selected topics try to present some open problems and challenges with important topics ranging from design tools, new post-silicon devices, GPU-based parallel computing, emerging 3D integration, and antenna design.

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  • Introduction: Mixed ionic–electronic conductors (MIECs) have been and continue to be of interest for strategic applications related to energy conversion and environmental monitoring including batteries, fuel cells, permeation membranes, and sensors. Within solid oxide fuel cells (SOFCs), for instance, nanostructured ionic and electronic conducting materials can increase the electrochemical performance of the cathode and thus could potentially facilitate lower-temperature operation and thereby provide faster start-up times, improved stability, and less complicated thermal management. ...

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  • Ennore Creek becomes the pollution point in Bay of Bengal which influences the marine resources and productivity of the region. This coastal belt in the neighboring areas of the city is viewed as dumping sites for industrial effluents and disposing domestic waste (Arunagiri et al., 1998). The natural wealth of the creek is now being eroded to mere sewage channel (Jayaprakash, 2003). The Ennore Thermal Power Plant uses the river waters as coolant and lets out the warm water, in the Ennore Creek.

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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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  • Historic gas street lamps in cities like Berlin, Prague and Warsaw can now be upgraded to energy-saving LED technology, thanks to a solid-state retrofit designed by Berlin-based Braun Schaltgeräte & Service with assistance from LED solutions provider Future Lighting Solutions.

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  • ADC’s latest addition to its family of outside plant products, the Radiator II Below Ground HDSLx Repeater Housing, is a highly costeffective outside plant enclosure for local loop electronics. With its advanced thermal management capabilities, the Radiator II extends the life of enclosed cards or repeaters and reduces costly truck rolls and maintenance. Radial placement of modular card cages permits efficient and predictable thermal transfer for uniform cooling. In addition, its unique design allows the heat to radiate externally, increasing the reliability of the enclosed electronics....

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  • In order to maintain economic development and minimize future regional and international conflicts, the United States will need sustainable supplies of high-quality fresh water. Solutions to local water scarcity issues will likely require a combination of approaches, including demand management, improved water storage capacity, water quality protection, and advancements in supply-enhancing water treatment technologies. Desalination technologies can create new sources of freshwater from otherwise impaired waters such as seawater or brackish water.

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  • The reactor design of the SCR system utilizes a fixed-bed catalyst in a vertical down-flow multi-stage configuration. The SCR reactor is designed to contain sufficient catalyst to meet the NOX guarantee requirement based on the specified inlet NOX. The reactor housing consists of standard plate construction containing stiffeners and structural supports for earthquake, catalyst support, sealing, loading stress, and thermal stress. The externally insulated reactor housing is constructed with a steel casing reinforced and supported by structural steel members.

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  • ADC’s latest addition to its family of outside plant products, the Radiator II Above Ground HDSLx Repeater Housing, is a highly cost- effective outside plant enclosure for local loop electronics. With its advanced thermal management capabilities, the Radiator II extends the life of enclosed cards or repeaters and reduces costly truck rolls and maintenance. Radial placement of modular card cages permits efficient and predictable thermal transfer for uniform cooling. In addition, its unique design allows the heat to radiate externally, increasing the reliability of the enclosed electronics....

    pdf2p minhtuan 10-08-2009 147 2   Download

  • As network equipment such as routers and switches, continues to evolve, changes in proper cable-management techniques and recommendations must also keep up with the times. Routers and switches are being marketed with higher densities and more capabilities. These higher-density platforms have more cables feeding them and require more power. More powerful equipment gives out more heat, so careful airflow and thermal management is more important than ever. Density within a single cabinet is increasing.

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  • Combustion units (process furnaces, steam boilers and gas turbines) give rise to emissions of carbon dioxide, nitrogen oxides, sulphur dioxide and particulates. Nitrogen oxide emissions are most commonly reduced by combustion modifications that reduce temperatures and hence the formation of thermal NOx. The techniques include low NOx burners, flue gas recirculation, and reduced pre-heat. Nitrogen oxides can also be removed after they have formed by reduction to nitrogen using Selective Non Catalytic Reduction (SNCR) or Selective Catalytic Reduction (SCR). Water pollutant control.

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  • Extreme-scale computation: Integrate computer science and applied mathematical foundations to address the challenges of achieving productive and efficient computation at the exascale level and beyond. Develop innovative systems that combine increased speed, economic viability, high productivity, and robustness to meet future agency needs for systems that manage ultra-large volumes of data and run multi-scale, multidisciplinary science and engineering simulations.

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  • The specific process employed will depend on factors such as the characteristics and constituents of the potash ore and the market specifications. Generally, the ore is reduced in size using a system of crushing and grinding to liberate the different miner- als from each other. This is usually followed by desliming by intense agitation followed by flotation or hydrocyclones to separate the fines consisting of clays, dolomite and sand from the potash ore.

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  • Rapid prototyping is now also seen as an integral part of the even larger but not well defined rapid tooling (RT) market. Concept modeling addresses the early stages of the design process, whereas RT concen- trates on production tooling or mold making. Some concept modeling equipment, also called 3D or office printers, are self-contained desktop or benchtop manufacturing units small enough and inexpensive enough to permit prototype fabrication to be done in an office environment.

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  • CHAPTER 4 9 SOLAR ENERGY APPLICATIONS Jan E Kreider Jan F. Kreider and Associates, Inc. and Joint Center for Energy Management University of Colorado Boulder, Colorado 49.1 SOLAR ENERGY AVAILABILITY 1 4 5 9 49.1.1 Solar Geometry 1 4 5 9 49.1.2 Sunrise and Sunset 1552 49. 1 .3 Quantitative Solar Flux Availability 1 5 5 4 SOLAR THERMAL COLLECTORS 1 6 5 0 49.2. 1 Flat-Plate Collectors 1 560 49.2.2 Concentrating Collectors 1564 49.2.3 Collector Testing 1 6 5 8 SOLAR THERMAL APPLICATIONS 1 6 5 9 49.3.1 Solar Water Heating 1 6 5 9 49.4 49.2 49.3.2 Mechanical Solar Space Heating Systems...

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