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Heat Transfer in Horizontal Copper Tube Heated by Electric Heating Process

Electrical Science & Engineering 2020年第2期2卷 1-4页

作者： Ramesh Chandra nayak Abinash Sahoo manmatha kRoul Saroj kuSarangi mechanical Engineering Department Synergy Institute of Engineering&TechnologyDhenkanalOdishaIndia mechanical Engineering Department Bhubaneswar college of EngineeringBhubaneswarOdishaIndia mechanical Engineering Department Gandhi Institute for TechnologicalAdvancementOdishaIndia mechanical Engineering Department National Institute of TechnologyPatna.BiharIndia.

Heat transfer from electrical and electronics component is essential for better performance of that electrical system,The maximum heat transfer from that system results long period *** most of the system base provided for equipments are very small and placed in a very complicated *** heat transfer by forced convection is not easy for that *** heat transfer by natural convection is the familiar technique used in electronics cooling;there is huge group of apparatus that lends itself to natural *** category consist of stand-alone correspondence such as modems and small computers having an array of printed circuit boards(PCB)accumulate within an *** convection heat transfer in heated horizontal duct drive away heat from the interior surface is *** duct is open-ended and round in cross *** test section is heated by provision of heating coils,where constant wall heat flux *** transfer experiment is carried out for channel of 50 *** diameter and 4 mm thickness with length 600 *** of length to diameter of the channel are taken as L/D=*** heat fluxes maintained at q//=300 W/m2 to 3150 W/m2.A methodical investigational record for the local steady state natural convection heat transfer activities is *** wall heating condition on local steady-state heat transfer phenomena are *** present experimental data is compared with the existing theoretical and experimental results for the cases of vertical smooth tubes.

关键词： Heat transfer Components System Horizontal tube Heating coil Heat flux Smooth tubes Test section

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A Comparative Study on Processing of High Alumina Hematite Iron Ore by Gravity, magnetic and Flotation methods

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材料科学与工程（中英文A版） 2013年第5期3卷 349-354页

作者： Rajendra kumar Rath Sunati mohanty Bibhuranjan nayak Ratnakar Singh kalyan kumar Bhattacharyya mineral Processing Division CSIR-National Metallurgical Laboratory Council of Scientific and Industrial Research Burma MinesJamshedpur 831007 India

The low grade iron ore sample contains both lumps and fines. It is mostly hematitic iron ore and considerable amount of goethitic/limonitic material is also present in it. The major impurities present were quartz and clay. It is observed that the iron bearing phases are poorly liberated above 300 μm and the liberation improves below 300 μm. more than 80% liberation is achieved below 106 μm. Based on the liberation data, the feed for the different beneficiation methods was prepared by stage crushed the ROm followed by grinding passing to 106 μm and the ground material (-106 μm) was deslimed. The underflow was subjected to various beneficiation techniques such as tabling, enhanced gravity separator (EGS), wet high intensity magnetic separation (WHImS) and flotation and the results are discussed. All the methods studied could be able to produce pellet grade concentrate with iron content of 64.5%, however, a marginal higher yield was observed for WHImS (81%).

关键词：重力分离器浮选方法赤铁矿氧化铝低品位铁矿石磁力地面材料选矿方法

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Development of a Separation Scheme to Search for ^(239)Cm Part Ⅰ: Overall separation scheme

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2004年第1期 57-57页

作者： W. Brüchle E. Jger D. nayak E. Schimpf B. Schausten m. Schdel GSI Darmstadt GermanyGSI Darmstadt GermanyGSI Darmstadt GermanyGSI Darmstadt GermanyGSI Darmstadt GermanyGSI Darmstadt Germany

As radiochemical techniques have an unsurpassed sensitivity, they are best apt to search for, to identify and to determine very small α-decay branches of longer-lived transuranium nuclides. Therefore, we have developed a chemical separation scheme to search for the 'missing' α-decay branch in 239Cm (T1/2≈3 h). Details of the motivation for this experiment and preliminary results from the first experiments are given elsewhere in this report.

关键词：搜索化学技术超铀核素化学分离灵敏度变分实验

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Development of a Separation Scheme to Search for 239Cm Part Ⅰ: Overall separation scheme

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ImP & HIRFL Annual Report 2004年 78-78页

作者： W. Brüchle,E. Jger,D. nayak,E. Schimpf,B. Schausten,m. Schdel GSI Darmstadt Germany GSI Darmstadt Germany GSI Darmstadt Germany GSI Darmstadt Germany GSI Darmstadt Germany GSI Darmstadt Germany

As radiochemical techniques have an unsurpassed sensitivity, they are best apt to search for, to identify and to determine very small α-decay branches of longer-lived transuranium nuclides. Therefore, we have developed a chemical separation scheme to search for the "missing" α-decay branch in 239Cm (T1/2≈3 h). Details of the motivation for this experiment and preliminary results from the first experiments are given elsewhere in this report.

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