排序方式: 共有17条查询结果,搜索用时 78 毫秒
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水情自动测报系统在乌江渡区间流域的应用 总被引:1,自引:0,他引:1
乌江渡水电站建立的区间流域水情自动测报系统,为保证电站的安全运行发挥了重要作用,具有显著的效益,对推动我省水情自动测报系统的建立具有积极的作用。 相似文献
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高职《化工仪表及自动化》教学思考与改革 总被引:1,自引:0,他引:1
化工仪表及自动化是一门综合性的技术学科。随着社会和科学技术的发展,传统的课程体系的教学内容和方法已经不适应现代社会的需要,尤其作为高职高专院校,必须对本课程进行教学指导思想、教学内容和教学方法及教学条件的改进。注重培养学生的实际操作和创新能力,使学生成为化工行业高技能型人才。 相似文献
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The Thorium Molten Salt Reactor (TMSR) project plans to construct a 2 MWt liquid fuel molten salt reactor. After successful R&D of the proto-type equipment like pump, heat exchanger and freeze valve, construction of a high temperature fluoride loop is designed and constructed to test them. The rated power of heat exchange is designed to be 200 kW, and the flow rate is set as 15 m3/h by the caloric equation. Hence the pipe caliber chose to be DN50. The numerical computation by Fluent revealed that the pressure drop of the loop system is about 155 kPa, and the overdesign of the pump head is set as 20 m accordingly. To avoid thermal stress concentration of the pipeline, both the electric heater and radiator are designed to be fixed on a flexible universal sphere support, except the pump which is anchored on steel support directly. The structural design of the equipment and the loop hase been verified by several tests with an accumulated operating time near 4000 hours. The actual pressure drop of the loop is about 110~120 kPa, which still needs to be accurately measured by differential manometer in future. The analysis of the impurity of the molten salt shows that the contents of Cr and Mo increased by two orders of magnitude after loop operation, which means that an obvious material corrosion occurs. The level of moisture and oxygen, which is the main reason that cause fluoride corrosion, should be controlled considerably lower than the original design level of 100 μL/L. 相似文献
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研究了在辐照条件下受阻胺光稳定剂(HALS)、各种抗氧剂及HALS与抗氧剂并用等对聚丙烯(PP)的黄度(YI)的影响。实验发现,添加五甲基HALS的聚丙烯的黄度均小于添加相应的四甲基HALS的聚丙烯的黄度。当抗氧剂Irganox1076和PDS并用时,聚丙烯的黄度比单独添加1076或PDS的聚丙烯的黄度都低。单独添加1076的聚丙烯的黄度比添加抗氧剂Irgafos168或IrganoxPS-802的聚丙烯的黄度都小。当PDS和Irganox1076并用时聚丙烯的黄度小于PDS和Irgafos168或IrganoxPS-802并用时的黄度。辐照后聚丙烯的黄度开始随放置时间很快降低,但随时间增加,黄度的变化逐渐减慢,最后基本保持不变。对结果进行了分析和讨论。 相似文献
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提出了基于扩展等面积准则(extended equal area criterion,EEAC)的动态等值模型可信度评估方法。首先,简要介绍了动态等值的基本原理及方法,讨论了动态等值模型的有效性问题;接着。应用基于EEAC的稳定分析量化理论。对不同故障下等值前、后系统的功角稳定裕度、临界切除时间等稳定量化指标进行对比,定义了等值系统的可信度指标。最后,以IEEE 10机39节点系统及福建电网为例,应用Fastest软件对采用不同等值模型算例系统的稳定量化指标进行了计算,在此基础上计算了其可信度指标。仿真算例结果表明,基于动态相似度及缓冲区的动态等值模型能更好地保持原系统动态特性,暂态稳定分析结果的可信度更高。 相似文献
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模拟液化烃储罐发生火灾爆炸事故,采用TNT当量法和热辐射通量法分别对满罐液化烃造成的蒸气云爆炸冲击波伤害区域和热辐射伤害区域进行了定量计算;并在此基础上,进一步着重分析了不同充装系数下对其结果的影响。 相似文献