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Study on the sealing test method of hydraulic solenoid valve in nuclear power station 核电站液压电磁阀密封试验方法研究
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338201001
Haibao Wang, Xudong Tan, Qunxiong Xiao, Xincai Chang
In order to improve the reliability of tripping solenoid valve and switching solenoid valve of steam turbine valve in nuclear power plant and reduce abnormal valve closing. According to the working principle of valves in nuclear power plant, this paper designs a kind of electromagnetic valve sealing test system, including test base, measurement and control system and hydraulic system. The detection system is an offline system. By simulating the real load condition of the steam turbine system, the tightness of the tripping solenoid valve and the switching solenoid valve is tested to improve the reliability of the solenoid valve. The actual application results show that the system operates stably and reliably, is simple to operate, has high detection efficiency and accuracy, and has good use effect.
为了提高核电站汽轮机阀门跳闸电磁阀和开关电磁阀的可靠性,减少阀门非正常关闭。根据核电站阀门的工作原理,设计了一种电磁阀密封试验系统,包括试验基地、测控系统和液压系统。检测系统为离线系统。通过模拟汽轮机系统的真实负载情况,对脱扣电磁阀和切换电磁阀的密封性进行了测试,提高了电磁阀的可靠性。实际应用结果表明,该系统运行稳定可靠,操作简单,检测效率和精度高,使用效果良好。
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引用次数: 0
Research on seismic behavior of prefabricated building joints in China 中国装配式建筑节点抗震性能研究
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338001004
H. Zhang
The rapid development of China’s construction industrialization process has led to increased research into prefabricated building structures. In comparison to cast-in-place construction, prefabricated buildings offer many advantages. Increasingly important has been research on prefabricated building joints’ seismic performance. A prefabricated beam, slab, column, and wall’s connection affects its seismic performance, and each joint has different characteristics. In light of this, this paper analyzed the seismic performance of prefabricated joints based on their development and application.
随着中国建筑工业化进程的快速发展,对装配式建筑结构的研究日益增多。与现浇建筑相比,预制建筑具有许多优点。装配式建筑节点的抗震性能研究日益受到重视。装配式梁、板、柱、墙的连接方式影响其抗震性能,每个连接方式具有不同的特点。鉴于此,本文结合预制节点的发展和应用,对其抗震性能进行了分析。
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引用次数: 0
Study of pathways to reduce the energy consumption of the CO2 capture process by absorption-regeneration 通过吸收-再生降低CO2捕集过程能耗的途径研究
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337904002
L. Dubois, A. Costa, G. De Weireld, Diane Thomas
Several industrial sectors, such as for example cement manufacturers and lime producers, produce so-called “unavoidable” CO2 emissions because these ones are intrinsically linked to the industrial process itself (decarbonation of calcium carbonate). In order to reduce these emissions, it is necessary to implement a Carbon Capture, Utilization and/or Storage (CCUS) process chain, whose step of capture, although already technologically mature (especially the absorption-regeneration process using amine(s)-based solvents), leads to very high energy consumption. Three pathways to reduce this consumption have been investigated (experimentally and/or through the development of Aspen PlusTM simulations), namely: (i) upstream of the process thanks to the increase of the flue gas CO2 content (by partial oxy-combustion and/or flue gas recirculation), (ii) within the process (using more efficient and innovative mixtures of solvents such as demixing solutions), and (iii) at the configurational level by using advanced configurations in the capture process. It emerged that the use of a demixing process such as the mixture composed of diethylethanolamine (DEEA) and methylamino-propylamine (MAPA), or the implementation of an advanced process configuration (InterCooling Absorber + Rich Vapor Compression + Rich Solvent Splitting and Preheating, with methyldiethanolamine (MDEA) + piperazine (PZ) as a solvent) are the most energy reducing pathways for the absorption-regeneration process, i.e. more than 40% in comparison with a conventional process using monoethanolamine (MEA). Moreover, from an economical point of view, and compared to a basic configuration with MEA, the demixing technology has the advantage of being able to achieve such energy performance with a more limited investment (CAPEX) (+1.6%) than with advanced process configurations (+8.8%).
一些工业部门,例如水泥制造商和石灰生产商,产生所谓的“不可避免的”二氧化碳排放,因为这些排放与工业过程本身(碳酸钙脱碳)有内在联系。为了减少这些排放,有必要实施碳捕获、利用和/或储存(CCUS)过程链,尽管其捕获步骤在技术上已经成熟(特别是使用胺基溶剂的吸收-再生过程),但会导致非常高的能耗。已经研究了减少这一消耗的三种途径(通过实验和/或通过开发Aspen PlusTM模拟),即:(i)由于增加烟气二氧化碳含量(通过部分氧燃烧和/或烟气再循环),(ii)在过程中(使用更有效和创新的溶剂混合物,如除混溶液),以及(iii)在配置层面,通过在捕获过程中使用先进的配置。结果表明,采用二乙基乙醇胺(DEEA)和甲氨基丙胺(MAPA)混合的脱混工艺,或采用先进的工艺配置(中冷吸收塔+富蒸气压缩+富溶剂裂解和预热,甲基二乙醇胺(MDEA) +哌嗪(PZ)为溶剂)是吸收再生过程中最节能的途径。即与使用单乙醇胺(MEA)的传统工艺相比,高出40%以上。此外,从经济的角度来看,与MEA的基本配置相比,脱混技术的优势在于能够以更有限的投资(CAPEX)(+1.6%)实现这种能源性能,而不是采用先进的工艺配置(+8.8%)。
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引用次数: 0
Defect Detection of Aluminum Profiles based on Improved Feature Pyramids 基于改进特征金字塔的铝型材缺陷检测
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338001016
Jie Wang, Yan Zhang, Feng Pan, Lin Wang
For the surface defects of aluminum profiles, there are problems of multi-scale, small object and irregular shape. This paper proposes a defects detection algorithm based on improved feature pyramid. This method compresses and saves the feature information extracted by the backbone networks, and calculates the similarity between deep and shallow features, so as to alleviate the phenomenon of loss of feature information and weakening of feature expression ability, thereby solving the problem of multi-scale and small object. At the same time, deformable convolution is introduced to enhance the feature extraction ability of the model and alleviate the detection problems caused by irregularly shaped defects. To verify the effectiveness of the proposed method, Faster R-CNN was used as the basic detection algorithm to conduct ablation experiments, and compared with the classical detection algorithm, the accuracy rate was as high as 72.8%. The experimental results show that the proposed method has a good performance on the task of aluminum profile defects detection, and is superior to the comparative detection algorithms.
铝型材表面缺陷存在多尺度、对象小、形状不规则等问题。提出了一种基于改进特征金字塔的缺陷检测算法。该方法对骨干网提取的特征信息进行压缩和保存,并计算深、浅特征之间的相似度,从而缓解了特征信息丢失和特征表达能力减弱的现象,从而解决了多尺度、小对象的问题。同时,引入了可变形卷积,增强了模型的特征提取能力,缓解了不规则形状缺陷带来的检测问题。为了验证所提方法的有效性,采用Faster R-CNN作为基本检测算法进行烧蚀实验,与经典检测算法相比,准确率高达72.8%。实验结果表明,该方法在铝型材缺陷检测任务上具有良好的性能,优于比较检测算法。
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引用次数: 0
Design and comparative analysis of grid-connected BIPV system with monocrystalline silicon and polycrystalline silicon in Kandahar climate 坎大哈气候条件下单晶硅和多晶硅BIPV并网系统设计与比较分析
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337403002
Ahmad Shah Irshad
Building integrated photovoltaic (BIPV) system is a new and modern technique for solar energy production in Kandahar. Due to its location, Kandahar has abundant sources of solar energy. People use both monocrystalline and polycrystalline silicon solar PV modules for the grid-connected solar PV system, and they don’t know that which technology performs better for BIPV system. This paper analysis the parameters, described by IEC61724 “Photovoltaic System Performance Monitoring Guidelines for Measurement, Data Exchange and Analysis” to evaluate which technology shows better performance for the BIPV system. The monocrystalline silicon BIPV system has a 3.1% higher array yield than the polycrystalline silicon BIPV system. The final yield is 0.2% somewhat higher for monocrystalline silicon than polycrystalline silicon. Monocrystalline silicon has 0.2% and 4.5% greater yearly yield factor and capacity factors than polycrystalline silicon respectively. Monocrystalline silicon shows 0.3% better performance than polycrystalline silicon. With 1.7% reduction and 0.4% addition in collection losses and useful energy produced respectively, monocrystalline silicon solar PV system shows good performance than polycrystalline silicon solar PV system. But system losses are the same for both technologies. The monocrystalline silicon BIPV system injects 0.2% more energy to the grid than the polycrystalline silicon BIPV system.
建筑一体化光伏(BIPV)系统是坎大哈一种新型的现代太阳能发电技术。由于其地理位置,坎大哈拥有丰富的太阳能资源。人们在并网太阳能光伏系统中既使用单晶硅太阳能光伏组件,也使用多晶硅太阳能光伏组件,他们不知道哪种技术更适合BIPV系统。本文分析了IEC61724《光伏系统性能监测测量、数据交换和分析指南》中描述的参数,以评估哪种技术对BIPV系统表现出更好的性能。单晶硅BIPV系统的阵列产率比多晶硅BIPV系统高3.1%。单晶硅的最终产率比多晶硅高0.2%。单晶硅的年产率因子和容量因子分别比多晶硅高0.2%和4.5%。单晶硅的性能比多晶硅高0.3%。单晶硅太阳能光伏系统比多晶硅太阳能光伏系统表现出较好的性能,其收集损失和产生的有用能量分别减少1.7%和0.4%。但是两种技术的系统损失是相同的。单晶硅BIPV系统向电网注入的能量比多晶硅BIPV系统多0.2%。
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引用次数: 1
Structural performance of reinforced concrete beams with self-healing cover zone 带自愈保护层的钢筋混凝土梁的结构性能
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337808004
Shanlin He, M. Luković, H. Jonkers, E. Schlangen
In the current study, experiments were carried out to investigate the structural performance of reinforced concrete (RC) beams with a self-healing cover zone. The cover zone consists of a 1.5-cm-thick layer of bacteria-embedded strain hardening cementitious composite (SHCC) for a combination of crack width control and crack healing. The aim is to bring together two emerging technologies (i.e., self-healing and strain-hardening) that show great potential for realizing highly efficient concrete structures. RC beam without the self-healing cover was also prepared as the control specimen for comparison purposes. The experimental program includes loading the beams to failure in four-point bending configuration and sawing the beams to segments for crack pattern analysis and crack healing. Results show that the beams with selfhealing cover exhibited a 45-60% improvement in structural capacity. The crack patterns of the hybrid beams were also largely modified. While the reference beam formed only a few major cracks, the hybrid beams formed around 40 fine cracks in the constant bending moment region with an average crack width smaller than 0.2 mm even at maximum load. By having an improved cracking behavior and an enhanced self-healing capacity, it is expected that the beams with a self-healing cover will possess an extended service life at the expense of minimal additional cost.
在本研究中,对具有自愈覆盖区的钢筋混凝土梁的结构性能进行了试验研究。覆盖区由1.5 cm厚的细菌包埋应变硬化胶凝复合材料(SHCC)组成,用于裂缝宽度控制和裂缝愈合的结合。其目的是将两种新兴技术(即自愈和应变硬化)结合在一起,这两种技术在实现高效混凝土结构方面显示出巨大的潜力。不带自愈盖的RC梁也作为对照试件进行对比。实验程序包括将梁加载到四点弯曲状态,并将梁锯成段进行裂纹模式分析和裂纹修复。结果表明,自愈盖梁的结构承载力提高了45 ~ 60%。混合梁的裂缝形态也得到了很大的改变。参考梁仅形成少量大裂缝,而混合梁在恒弯矩区形成约40条细裂缝,即使在最大荷载下平均裂缝宽度小于0.2 mm。由于具有改善的开裂行为和增强的自愈能力,预计具有自愈盖板的梁将以最小的额外成本为代价延长使用寿命。
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引用次数: 0
Lessons learned from the EC MSCA ITN Project SMARTINCS: Smart, Multi-functional, Advanced Repair Technologies In Cementitious Systems 欧盟MSCA ITN项目SMARTINCS的经验教训:水泥系统中的智能、多功能、先进修复技术
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337801001
N. De Belie, Tim Van Mullem
Extended abstract. To avoid the negative effects of concrete cracking on the durability of our buildings and infrastructure, different approaches to provide concrete with self-healing properties have been designed over the last decades. Self-healing concrete should allow to guarantee the performance of a structure over its service life, preventing costly intensive repair and maintenance operations. By combined experimental research and coupled multiscale models, SMARTINCS moves beyond the state-of-the-art with respect to (1) the efficiency of self-healing concrete, at acceptable cost for real-scale applications; (2) the multi-functionality (corrosion inhibition, self-sensing) of the self-healing solutions; and (3) the technologies for local application of healing agents in high risk zones or in high value grouts and repair products. The developments of SMARTINCS will help society to build and renovate in a resource efficient way and will accelerate the shift to sustainable and smart mobility, thereby contributing to the European Green Deal. The scientific work is clustered in three Work Packages (WP): (1) Improved self-healing concrete, (2) Advanced local (self-) repair, and (3) Durability, service life and sustainability. These are supported by a fourth Work Package (4) Technology transfer and Entrepreneurship, which has as a main goal to ensure market oriented research. In this last work package, commercialization routes and the key success factors to meet exploitation are
扩展的抽象。为了避免混凝土开裂对建筑物和基础设施耐久性的负面影响,在过去的几十年里,人们设计了不同的方法来提供具有自愈特性的混凝土。自愈混凝土应保证结构在其使用寿命内的性能,防止昂贵的密集维修和维护操作。通过结合实验研究和耦合多尺度模型,SMARTINCS在以下方面超越了最先进的水平:(1)自愈混凝土的效率,在实际规模应用中成本可接受;(2)自愈溶液的多功能性(缓蚀、自感);(3)修复剂在高风险地区或高价值灌浆和修复产品中的局部应用技术。SMARTINCS的发展将帮助社会以资源高效的方式进行建设和翻新,并将加速向可持续和智能交通的转变,从而为欧洲绿色协议做出贡献。科学工作集中在三个工作包(WP)中:(1)改进自愈混凝土,(2)先进的局部(自我)修复,以及(3)耐久性,使用寿命和可持续性。这些工作得到第四个工作包(4)技术转让和创业的支持,其主要目标是确保面向市场的研究。在最后一个工作包中,商业化路线和满足开发的关键成功因素是
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引用次数: 0
Research on the optimization of electrochemical behavior model in the environment of novel composite fuel cell 新型复合燃料电池环境下电化学行为模型优化研究
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338001013
Ling Chen, Caibao Han, Chunxiao Wang, Ting Zhu
Composite materials have been widely studied due to their good mechanical, electrical and chemical properties, especially atomic structure fuel cells with large specific surface area, high electrical conductivity and good compatibility of composite materials. These new composite materials have many excellent physical and chemical properties, and are widely used in many fields, especially in the field of electrochemistry, showing their unique advantages. Composite materials play an important role in the electrocatalytic reaction of composite materials due to their high specific surface area and good compatibility of composite materials. The construction based on composite materials has high sensitivity, wide linear range, good repeatability and stability. As a catalyst in a fuel cell, the composite material can improve the energy density and fuel utilization rate of the fuel cell, which is a high-performance fuel cell.
复合材料因其良好的力学、电学和化学性能而受到广泛的研究,尤其是具有比表面积大、电导率高、复合材料相容性好的原子结构燃料电池。这些新型复合材料具有许多优异的物理和化学性能,广泛应用于许多领域,特别是在电化学领域,显示出其独特的优势。复合材料由于其高比表面积和良好的复合材料相容性,在复合材料电催化反应中起着重要的作用。复合材料结构具有灵敏度高、线性范围宽、重复性好、稳定性好等特点。复合材料作为燃料电池中的催化剂,可以提高燃料电池的能量密度和燃料利用率,是一种高性能的燃料电池。
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引用次数: 0
Modelling of Hydraulic Dynamics in Sludge Treatment Reed Beds with Moving Boundary Condition 移动边界条件下污泥处理芦苇床水力动力学建模
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337701013
Y. Z. Huong, Y. Tan, F. Tang, Saptoro Agus
The conventional method of simulation using fixed mesh method (FMM) of discretization is a well-known and trusted procedure in modelling hydraulic dynamics. However, new ideas of innovation in modelling should be advanced. The moving mesh method (MMM) has been considered as a novel approach in modelling hydraulic dynamics after depending on the existing simulation model for decades. The MMM is capable of describing the moving boundary condition of an actual wetland system due to water ponding. An idealized model should be able to simulate the actual hydraulic flows through the system with the corresponding porosity. Hence, a combination of MMM and FMM (MM-FMM) of discretization for hydraulic dynamics is studied in this project to model the flux with respect to water ponding scenario in a sludge treatment reed bed and unsaturated transient flow within the bed. Such method has evidently proved to simulate the actual hydraulic flows in contrast to conventional method. The application of MMM limits the maximum flux to keep within its saturated conductivity, thus reduces the effect of flow overprediction. Subsequently, the simulated results for hydraulic head and moisture content can be predicted for actual condition of different cases according to their respective fluxes.
传统的离散化固定网格法(FMM)是一种众所周知且可靠的水力动力学建模方法。然而,应该提出新的建模创新思路。几十年来,运动网格法一直依赖于现有的仿真模型,被认为是一种新的水力动力学建模方法。MMM能够描述实际湿地系统由于积水而产生的移动边界条件。理想的模型应该能够模拟具有相应孔隙率的系统的实际水力流动。因此,本项目研究了水力动力学离散化的MMM和FMM (MM-FMM)的结合,以模拟污泥处理芦苇床中积水情景和床内不饱和瞬态流动的通量。与传统方法相比,该方法能较好地模拟实际水力流动。MMM的应用限制了最大通量,使其保持在饱和电导率范围内,从而减少了流量过预测的影响。根据水头和含水率各自的通量,可以预测不同情况下实际情况的水头和含水率模拟结果。
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引用次数: 0
Intelligent mechanical manufacturing technology based on intelligent manufacturing technology 基于智能制造技术的智能机械制造技术
Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338201026
Kang Zheng
With the development of intelligent manufacturing technology, the application of intelligent machinery manufacturing technology has been widely promoted. Intelligent machinery manufacturing technology is a technology that integrates advanced manufacturing technology and intelligent control technology. It can realize the intelligent control of the entire manufacturing process, improve the manufacturing efficiency and product quality, and reduce the manufacturing cost. Based on intelligent manufacturing technology, intelligent machinery manufacturing technology has been developed rapidly and has been widely applied in various fields such as automotive, aviation and so on. It can achieve the goals of automation, intelligence, high efficiency, and personalization, and promote the development of various industries towards intelligent manufacturing. However, there are still challenges in the development and application of intelligent machinery manufacturing technology, such as the high cost of equipment, the difficulty in controlling the manufacturing process, and the lack of skilled workers. Future research should focus on solving these challenges and promoting the further development and application of intelligent machinery manufacturing technology.
随着智能制造技术的发展,智能机械制造技术的应用得到了广泛的推广。智能机械制造技术是集先进制造技术和智能控制技术于一体的技术。可以实现对整个制造过程的智能控制,提高制造效率和产品质量,降低制造成本。以智能制造技术为基础的智能机械制造技术得到了迅速发展,在汽车、航空等各个领域得到了广泛的应用。可以实现自动化、智能化、高效化、个性化的目标,促进各行业向智能制造方向发展。然而,智能机械制造技术的发展和应用仍然存在设备成本高、制造过程难以控制、熟练工人缺乏等挑战。未来的研究应着眼于解决这些挑战,推动智能机械制造技术的进一步发展和应用。
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引用次数: 0
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