DF11型机车柴油机隔振系统改进

对戚墅堰机车车辆厂DF11型机车柴油机隔振系统进行了改进研究,对改进前原有隔振系统进行了测试,提出了隔振器改进设计的思路和方法,并对改装6WN-8500型隔振器后进行了装车测试,对结果进行分析比较,证实了隔振器改进项目是成功的。     

汽轮机末叶片叶根强度分析与优化

针对某"215mm"汽轮机封口末叶片,应用有限元方法对其强度进行分析,对有限元计算的结果进行了验证,结合分析结果,对其结构进行了优化,并对不同的优化方案进行了对比,提出了结构优化的最佳方案。     

露天煤矿开采工艺发展探究

对露天开采的概念进行了叙述并简单介绍了中国露天开采的发展历程,对露天开采工艺划分进行了总结.随后对中国露天开采工艺的发展进行了较为详细的介绍,并对其未来发展趋势做出了展望.     

用于污泥干燥的热泵试验研究

叙述了城市污泥干燥处理的必要性,对采用热泵形式进行干燥进行了理论分析,并对理论分析进行了实验验证。     

复合条件下高层建筑物表面温度场研究

本文采用区域分解法对建筑物进行了划分,对所划分的面元进行了温度场模拟,给出了表面温度场的变化,对结果进行了定性分析,通过分析检验了结果的合理性。     

HXD2型电力机车自动换端控制研究与实现

介绍了HXD2型电力机车自动换端控制技术,对相关控制原理进行了系统阐述.首先对自动换端功能进行了概述,然后对自动换端升弓原理进行了逻辑分析,最后对机车外重联模式下的自动换端控制进行了详细说明.     

重型载重车发动机冷却系统设计改进及试验研究

简单介绍了国内外车辆冷却系统的研究概况。对某车型出现水温高的原因进行分析,对车辆的冷却系统进行了设计改进,并对改进后的车辆进行了试验验证,取得了满意的结果。     

电控柴油机ECU系统选型与设计论证及系统开发研究

本文对电子控制燃油喷射柴油机的电控单元ＥＣＵ进行了功能分析和系统结构设计,对其内核即单片机进行了选型,并对ＥＣＵ软件部分进行了概要设计,对系统开发计划进行了初步的探讨。     

国有煤炭企业环境保护的新思路

首先对国有煤炭企业环境保护工作的意义进行了说明,并对煤炭工业发展状况进行了分析,之后着重对国有煤炭企业环境保护策略进行了深入研究,从而帮助加快环境保护工作的进程。     

太阳能电热联用系统研究进展

首先对太阳能电热联用系统的基本组成形式进行了简要介绍,并对不同的电热联用集热器、热能利用 方式进行了对比分析,接着对电热联用的研究方法和发展现状进行了详细说明,并列举了一些电热联用产品和 示范工程,最后指出了电热联用发展中应解决的问题,并对其发展前景进行了展望。     

超超临界锅炉用材料的金属监督

本文介绍了超超临界锅炉选用材料的要求和特点。通过材料经济性分析，材料的制造、安装、使用中的金属监督方法，分析了金属材料监督重点问题，指出了探索新的检验方法、研究开发切实可行的在线检测技术、开展新材料和新工艺研究、探索超临界及超超临界电站锅炉的失效规律和表现形式等金属监督的研究方向。     

单晶硅埚底料中石英的分离研究

通过对单晶硅埚底料进行重熔试验,研究重熔后埚底料中石英的分离情况,并分析重熔所得到的硅片中的氧、碳、金属杂质含量,以期探讨埚底料在太阳电池多晶硅硅锭生产中用作原料的可行性.试验发现通过重熔可以将单晶硅埚底料中的石英与硅料分离,重熔后得到的硅片中氧含量比较高,而金属杂质含量基本可达到太阳电池多晶硅锭的生产要求.     

Numerical Investigation of PCM Based Heat Sinks with Embedded Metal Foam/Crossed Plate Fins

Three-dimensional numerical models for phase change material based heat sinks equipped with thermal conductivity enhancers like aluminum metal foam and crossed plate fins are validated with the experimental data found in literature. For the aluminum metal foam embedded in the heat sink filled with phase change material, the porosity and the pores per inch of the metal foam were varied and natural convection currents were studied. Maintaining the volume fraction of the phase change material as a constant, the thermal performance enhancement as a result of the introduction of thermal conductivity enhancer into the heat sinks is determined.     

Liquid metal enabled combinatorial heat transfer science: toward unconventional extreme cooling

As a class of newly emerging material, liquid metal exhibits many outstanding performances in a wide variety of thermal management areas, such as thermal interface material, heat spreader, convective cooling and phase change material (PCM) for thermal buffering etc. To help mold next generation unconventional cooling technologies and further advance the liquid metal cooling to an ever higher level in tackling more extreme, complex and critical thermal issues and energy utilizations, a novel conceptual scientific category was dedicated here which could be termed as combinatorial liquid metal heat transfer science. Through comprehensive interpretations on a group of representative liquid metal thermal management strategies, the most basic ways were outlined for developing liquid metal enabled combined cooling systems. The main scientific and technical features of the proposed hybrid cooling systems were illustrated. Particularly, five abstractive segments toward constructing the combinatorial liquid metal heat transfer systems were clarified. The most common methods on innovating liquid metal combined cooling systems based on this classification principle were discussed, and their potential utilization forms were proposed. For illustration purpose, several typical examples such as low melting point metal PCM combined cooling systems and liquid metal convection combined cooling systems, etc. were specifically introduced. Finally, future prospects to search for and make full use of the liquid metal combined high performance cooling system were discussed. It is expected that in practical application in the future, more unconventional combination forms on the liquid metal cooling can be obtained from the current fundamental principles.     

电爆炸喷涂技术在440 t/h CFB锅炉上防磨的应用

本文针对华能济宁发电厂#5炉内磨损严重的金属部件,分析了金属件的磨损机理,并采用电爆炸喷涂技术,在磨损最严重的风帽及水冷壁区域定向喷涂制备NiAl/TiC复合涂层,来强化防磨;与电弧喷涂作比较,介绍了此涂层的众多优越性能,如：涂层与基体为冶金结合;涂层本身硬度大;涂层喷涂均匀细密且薄,与管壁表面能平滑过渡,不损伤金属部件内部金相组织;大大延长了金属使用寿命,此技术已在多个电厂推广应用.     

汽车发动机粉末冶金热锻连杆

介绍了粉末冶金热锻连杆的材料成分和制造工艺。根据国外文献和国内外相关专利资料,比较了锻钢连杆和粉末冶金连杆的强度和疲劳寿命。详细说明了取自连杆的试样的机械性能和用连杆零件所作的疲劳试验的结果。此外,还讨论了在大量生产条件下,锻钢连杆和粉末冶金连杆在经济性方面的比较。最后提出了几点关于选择连杆材料和降低连杆成本的结论和建议。     

Heat transfer enhancement by metal screens and metal spheres in phase change energy storage systems

This study focuses on heat transfer enhancement in double pipe energy storage system. Enhancement is achieved by use of metal screens/spheres placed inside the phase change material (PCM), which is paraffin wax and results in increasing the effective thermal conductivity of the combined media of PCM and metal screens/spheres. The experiments are conducted as a function of the diameter and number of spheres inserted in the phase change material. Also, the experiments investigate the effect of increasing the temperature of the heat transfer fluid (HTF). Results are presented in terms of variations in the PCM Nusselt number and the melting Fourier number. Results indicate three-fold decrease in the Fourier number and similar increase in the Nusselt number. Replacing 2-volume percentage of the wax material by the metal spheres results in this large enhancement.     

铁水罐低成本维护技术的研究与应用

选择用后耐火材料再生料为主要原材料,通过原料的合理选择与配方优化试验,研制了性能优良、成本低廉的铁水罐维护用粘渣隔离喷涂料、罐沿浇注料与罐底垫补料;通过工业性试验与推广应用,不仅大幅度降低铁水罐维护成本与维护量,同时普通高铝砖铁水罐使用寿命由550次提高到800次以上.     

Liquid metal material genome: Initiation of a new research track towards discovery of advanced energy materials

As the basis of modern industry, the roles materials play are becoming increasingly vital in this day and age. With many superior physical properties over conventional fluids, the low melting point liquid metal material, especially room-temperature liquid metal, is recently found to be uniquely useful in a wide variety of emerging areas from energy, electronics to medical sciences. However, with the coming enormous utilization of such materials, serious issues also arise which urgently need to be addressed. A biggest concern to impede the large scale application of room-temperature liquid metal technologies is that there is currently a strong shortage of the materials and species available to meet the tough requirements such as cost, melting point, electrical and thermal conductivity, etc. Inspired by the Material Genome Initiative as issued in 2011 by the United States of America, a more specific and focused project initiative was proposed in this paper—the liquid metal material genome aimed to discover advanced new functional alloys with low melting point so as to fulfill various increasing needs. The basic schemes and road map for this new research program, which is expected to have a worldwide significance, were outlined. The theoretical strategies and experimental methods in the research and development of liquid metal material genome were introduced. Particularly, the calculation of phase diagram (CALPHAD) approach as a highly effective way for material design was discussed. Further, the first-principles (FP) calculation was suggested to combine with the statistical thermodynamics to calculate the thermodynamic functions so as to enrich the CALPHAD database of liquid metals. When the experimental data are too scarce to perform a regular treatment, the combination of FP calculation, cluster variation method (CVM) or molecular dynamics (MD), and CALPHAD, referred to as the mixed FP-CVM-CALPHAD method can be a promising way to solve the problem. Except for the theoretical strategies, several parallel processing experimental methods were also analyzed, which can help improve the efficiency of finding new liquid metal materials and reducing the cost. The liquid metal material genome proposal as initiated in this paper will accelerate the process of finding and utilization of new functional materials.     

Electronically conducting hybrid material as high performance catalyst support for electrocatalytic application

The electronically conducting hybrid material based on transition metal oxide and conducting polymer has been used as the catalyst support for Pt nanoparticles. The Pt nanoparticles loaded hybrid organic (polyaniline)–inorganic (vanadium pentoxide) composite has been used as the electrode material for methanol oxidation, a reaction of importance for the development of direct methanol fuel cells (DMFC). The hybrid material exhibited excellent electrochemical and thermal stability in comparison to the physical mixture of conducting polymer and transition metal oxide. The Pt nanoparticles loaded hybrid material exhibited high electrocatalytic activity and stability for methanol oxidation in comparison to the Pt supported on the Vulcan XC 72R carbon support. The higher activity and stability is attributed to the better CO tolerance of the composite material.