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1341材料在循环水泵上的应用 总被引:1,自引:0,他引:1
对热电厂发电机的三台循环水泵的运行状况进行了分析,并用BELZONA1341材料对水泵叶轮的表面进行了处理,减少了叶轮表面与水流的阻力和涡流的产生,降低了电机的有功电流,节约了电能,并且延长设备的寿命,效果十分明显. 相似文献
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阐述了根据生产实际情况,改造了宁夏恒力集团有限公司炼钢分厂18t电弧炉工作层耐材砌衬的材质及砖型,从而降低了工人的劳动强度,提高了工作效率,降低了企业生产成本,提高了经济效益。 相似文献
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针对兰州超高压输变电公司科研项目管理模式进行了研究与分析,提出了科研项目分解的方案,通过本方案明确了基本课题,可以较为全面、系统指导科研工作的开展,增强了科研项目实施的可操作性。构建了矩阵式科研项目管理组织结构,优化配置了公司各科研资源,明确了科研项目的各主要责任主体。确立了科研项目管理流程,做到闭环控制,加强了科研项目过程管理。 相似文献
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阐述了摩托车振动耐久试验台的设计方案。方案中描述了两轮摩托车振动耐久试验台的结构组成,详细介绍了系统的关键硬件电路,提出了车速控制策略,给出了车速的实时测量和控制流程图。实验表明,摩托车振动耐久试验台为摩托车的振动耐久检测提供了方便,高效,节能的试验平台。 相似文献
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张庆良 《柴油机设计与制造》2015,(3):53-56
解释了质量管理和质量保证的含义,归纳了丰田公司质量管理行为的演变历程。指出了统计质量控制的弊端,阐明了自主化质量管理的含义、实现方法和作用。分析了缺陷管理的直观判断法、机械辅助检查法、自动装置法,并给出了应用自动装置系统的实例。 相似文献
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本文介绍了超临界电站锅炉较多采用的喷管悬臂式减温器的结构形式,列举了近年来该结构形式的减温器发生喷管鹰;裂的多个案例,对其缺陷特点进行了说明,并从设计、制造和运行等方面分析了该问题产生的原因,提出了改进措施,这些措施已应用在了不同的电厂。结果表明,改进结构后的减温器成功的解决了喷管断裂的问题,运行效果良好。 相似文献
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The problem of the development of the salt concentration profiles in a solar pond is investigated. Three different types of boundary conditions are considered and exact solutions for the salt concentrations as functions of space and time are obtained and discussed. The effect of wind velocity and size of the pond on the effective mass diffusivity of salt is studied. Several examples of the development of the salt concentration profiles for various wind speeds and pond sizes are considered and the results are plotted and discussed. The time variations of salt fluxes and consumptions are also presented for some cases. 相似文献
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Radosław Tarkowski Grzegorz Czapowski 《International Journal of Hydrogen Energy》2018,43(46):21414-21427
Salt bearing formations have world-wide distribution. The geological structures of Permian salt bearing deposits in Poland are similar to those in the other parts of the Central European salt basin, to which they belong as its SE part. There is a notable trend to use salt domes as sites for underground storage of various gases, fuels and other substances, including hydrogen. Possibilities of using salt domes in Poland for underground hydrogen storage are presented with the focus on the option of using the underground space for energy storage. Usefulness of the 27 hitherto studied salt domes in the Polish Lowlands for underground hydrogen storage in caverns is evaluated using analytical methods of the geology of mineral deposits.Seven not yet developed salt domes are selected as the most promising ones, taking into account geological and reservoir criteria: Rogó?no, Damas?awek, Lubień, ?ani?ta, Goleniów, Izbica Kujawska and D?bina. Initial experience in underground hydrogen storage in salt caverns is presented. Geological conditions favourable for hydrogen storage in underground caverns leached in salt domes are outlined. Their advantage relative to underground storage sites in porous rocks (depleted hydrocarbon deposits and deep aquifers) is discussed. 相似文献
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通过水槽试验对有径流无潮、无径流有潮、有径流有潮三种组合情况下盐水入侵进行研究。有径流无潮试验表明,在水深和径流平均流速相同时,盐水入侵距离随盐度增大而增大;当水深和密度梯度力相同时,盐水入侵距离随径流量增大而减小;当径流平均流速和密度梯度力相同时,盐水入侵距离随水深的增大而增大,由此获得有径流无潮情况下水槽中盐水入侵距离公式。无径流有潮试验表明,当密度梯度力相同时,潮差小的咸界增长的快;潮差相同时,密度梯度力大的咸界增长快。有径流有潮试验表明,密度梯度力相同时,盐水入侵距离达到稳定所需的潮差随径流量增大而减小;当水深、潮差、盐度相同时,盐水入侵距离随径流量增大而减小;当潮差很小时,盐水的入侵距离大于无潮时盐水的入侵距离,而后随潮差增大,盐水入侵距离减小;并从半个潮周期内水位平均的角度解释了潮差很小时的试验现象。 相似文献
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蒸汽发生系统(steam generation system,SGS)是塔式太阳能热发电站的重要组成部分。采用仿真模拟软件Thermoflex对塔式太阳能热发电站的熔盐SGS进行了建模,并基于实际工程数据验证了所搭建模型的准确性。以此为基础,仿真研究了熔盐SGS的换热工质参数(给水温度、主蒸汽温度、主蒸汽压力)对熔盐SGS性能的影响,其中,水侧温度和压力的变化对熔盐侧参数(熔盐流量、熔盐SGS出口的熔盐温度)和换热设备的换热功率均存在较大影响。研究得到的不同换热工质参数对熔盐SGS性能和整个塔式太阳能热发电站的影响规律可为熔盐SGS的设计提供理论依据。 相似文献
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超声波法测量盐水溶液浓度 总被引:2,自引:0,他引:2
利用超声波在不同浓度、不同温度的盐水溶液中传播速度不同这一特性,测出盐浓度S、声速V和温度T之间的关系,绘制不同温度下的S-V曲线和不同浓度下的V-T曲线,用计算机对实验曲线进行拟合,给出相应的多项式回归方程,模拟计算结果十分接近实验结果,该方法测试简便,精确度高。 相似文献
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Liu Bin Wu Yu-ting Ma Chong-fang Ye Meng Guo Hang 《International Communications in Heat and Mass Transfer》2009,36(9):912-916
In order to understand the heat transfer characteristics of molten salt and testify the validity of the well-known empirical convective heat transfer correlations, an experimental study on turbulent convective heat transfer with molten salt in a circular tube was conducted in this paper. Molten salt circulations were realized and operated in a specially designed system over 1000 h. The flow rates and temperatures of molten salt and mineral oil at the inlet and outlet in the test section were measured and the average forced convective heat transfer coefficients of molten salt were determined by least-squares method. Finally, heat transfer correlations of turbulent flow with molten salt in a circular tube were obtained. Good agreement was observed between the experimental data of molten salt and the existing well-known correlations. The experimental data of molten salt in the present work are consistent with experimental results reported by different references in a wide range of Prandtl numbers from 0.7 to 59.9. 相似文献
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集成熔盐储热是有望大幅提高燃煤发电机组运行灵活性的有效手段。本文针对集成熔盐储热的燃煤发电系统,建立了变工况模型与火用分析模型,针对以再热蒸汽为热源且加热熔盐后分别返回低压缸入口和凝汽器的两种熔盐储热系统,研究获得了燃煤机组运行灵活性和能耗特性的变化规律。结果表明:采用不同储热系统构型对燃煤机组的灵活性与能耗特性的影响差异明显。集成两种熔盐储热系统,燃煤机组的最低工作负荷从额定负荷的30%分别降低到20.58%与24.43%,系统火用损失则分别增加了48.67 MW与18.7 MW。 相似文献