针对YF17A型卷烟存储输送器运行过程中EtherCAT网络故障频发的问题,文中分析了EtherCAT网络的结构,改进了YF17A卷烟存储输送器的EtherCAT网络系统。通过在TwinCAT System Manager软件中重新组态Ether⁃CAT网络系统的硬件,在原EtherCAT网...针对YF17A型卷烟存储输送器运行过程中EtherCAT网络故障频发的问题,文中分析了EtherCAT网络的结构,改进了YF17A卷烟存储输送器的EtherCAT网络系统。通过在TwinCAT System Manager软件中重新组态Ether⁃CAT网络系统的硬件,在原EtherCAT网络硬件的基础上增加带E-BUS通信功能的BECKHOFF EL9410电源模块,EtherCAT网络供电得到了极大的改善。应用效果表明,改进后的EtherCAT网络解决了因模块供电不足而导致的I/O模块通信故障、E-BUS通信故障、伺服驱动器通信故障等问题。展开更多
A solid-state storage system is the most practical option for hydrogen because it is more convenient and safer.Metal hydrides,especially MgH_(2),are the most promising materials that offer high gravimetric capacity an...A solid-state storage system is the most practical option for hydrogen because it is more convenient and safer.Metal hydrides,especially MgH_(2),are the most promising materials that offer high gravimetric capacity and good reversibility.However,the practical application of MgH_(2) is restricted by slow sorption kinetics and high stability of thermodynamic properties.Hydrogen storage performance of MgH_(2) was enhanced by introducing the Mg–Na–Al system that destabilises MgH_(2) with NaAlH_(4).The Mg–Na–Al system has superior performance compared to that of unary MgH_(2) and NaAlH_(4).To boost the performance of the Mg–Na–Al system,the ball milling method and the addition of a catalyst were introduced.The Mg–Na–Al system resulted in a low onset decomposition temperature,superior cyclability and enhanced kinetics performances.The Al_(12)Mg_(17) and NaMgH_(3) that formed in situ during the dehydrogenation process modify the reaction pathway of the Mg–Na–Al system and alter the thermodynamic properties.In this paper,the overview of the recent progress in hydrogen storage of the Mg–Na–Al system is detailed.The remaining challenges and future development of Mg–Na–Al system are also discussed.This paper is the first review report on hydrogen storage properties of the Mg–Na–Al system.展开更多
The structure and hydriding/dehydriding behaviors ofLa2Mgl7-10 wt.%Ni composite prepared by mechanical milling were investigated. Compared with the tin-milled sample, the as-milled alloys were ready to be activated an...The structure and hydriding/dehydriding behaviors ofLa2Mgl7-10 wt.%Ni composite prepared by mechanical milling were investigated. Compared with the tin-milled sample, the as-milled alloys were ready to be activated and the kinetics of hydrogen ab- sorption was relatively fast even at environmental temperature. The composite milled for 10 h absorbed 3.16 wt.% hydrogen within 100 s at 290 K. The kinetic mechanisms ofhydriding/dehydriding reactions were analyzed by using a new model. The results showed that hydrogenation processes for all composites were controlled by hydrogen diffusion and the minimum activation energy was 15.3 kJ/mol H2 for the composite milled for 10 h. Mechanical milling changed the dehydriding reaction rate-controlling step from surface penetration to diffusion and reduced the activation energy from 204.6 to 87.4 kJ/mol H2. The optimum milled duration was 5 h for desorption in our trials.展开更多
文摘针对YF17A型卷烟存储输送器运行过程中EtherCAT网络故障频发的问题,文中分析了EtherCAT网络的结构,改进了YF17A卷烟存储输送器的EtherCAT网络系统。通过在TwinCAT System Manager软件中重新组态Ether⁃CAT网络系统的硬件,在原EtherCAT网络硬件的基础上增加带E-BUS通信功能的BECKHOFF EL9410电源模块,EtherCAT网络供电得到了极大的改善。应用效果表明,改进后的EtherCAT网络解决了因模块供电不足而导致的I/O模块通信故障、E-BUS通信故障、伺服驱动器通信故障等问题。
基金This work was supported by the Ministry of Higher Education Malaysia through the Fundamental Research Grant Scheme(FRGS/1/2019/STG07/UMT/02/5)The authors also thank the Universiti Malaysia Terengganu for providing the facilities to carry out this project.Scheme(FRGS/1/2019/STG07/UMT/02/5)The authors also thank the Universiti Malaysia Terengganu for providing the facilities to carry out this project.
文摘A solid-state storage system is the most practical option for hydrogen because it is more convenient and safer.Metal hydrides,especially MgH_(2),are the most promising materials that offer high gravimetric capacity and good reversibility.However,the practical application of MgH_(2) is restricted by slow sorption kinetics and high stability of thermodynamic properties.Hydrogen storage performance of MgH_(2) was enhanced by introducing the Mg–Na–Al system that destabilises MgH_(2) with NaAlH_(4).The Mg–Na–Al system has superior performance compared to that of unary MgH_(2) and NaAlH_(4).To boost the performance of the Mg–Na–Al system,the ball milling method and the addition of a catalyst were introduced.The Mg–Na–Al system resulted in a low onset decomposition temperature,superior cyclability and enhanced kinetics performances.The Al_(12)Mg_(17) and NaMgH_(3) that formed in situ during the dehydrogenation process modify the reaction pathway of the Mg–Na–Al system and alter the thermodynamic properties.In this paper,the overview of the recent progress in hydrogen storage of the Mg–Na–Al system is detailed.The remaining challenges and future development of Mg–Na–Al system are also discussed.This paper is the first review report on hydrogen storage properties of the Mg–Na–Al system.
基金Project supported by the Guizhou Nomarch Fund Project of Excellent Technology and Education Talents (201019)Specialties Projects funded for the Scientific Research Condition of Guizhou High-Level Talents (TZJF200927)
文摘The structure and hydriding/dehydriding behaviors ofLa2Mgl7-10 wt.%Ni composite prepared by mechanical milling were investigated. Compared with the tin-milled sample, the as-milled alloys were ready to be activated and the kinetics of hydrogen ab- sorption was relatively fast even at environmental temperature. The composite milled for 10 h absorbed 3.16 wt.% hydrogen within 100 s at 290 K. The kinetic mechanisms ofhydriding/dehydriding reactions were analyzed by using a new model. The results showed that hydrogenation processes for all composites were controlled by hydrogen diffusion and the minimum activation energy was 15.3 kJ/mol H2 for the composite milled for 10 h. Mechanical milling changed the dehydriding reaction rate-controlling step from surface penetration to diffusion and reduced the activation energy from 204.6 to 87.4 kJ/mol H2. The optimum milled duration was 5 h for desorption in our trials.
