The filtration efficiency and resistance during the process of fluid flowing through filter materials is significantly influenced by the characteristic of filter materials, especially for air-filter materials which generally have a multi-fiber composite structure. Therefore, it is important to pay attention to the filtration efficiency and resistance of multi-fiber filter materials. In this study, theoretical equations of filtration efficiency and resistance were proposed based on uniform and multi-fiber composite filter materials, and series of experimental verifications had been implemented. The results indicated that the experimental results verified the theoretical equations well, which may accelerate the research and development of new air-filter materials.
{"title":"Theoretical and experimental research of filtration efficiency and resistance of multi-fiber air-filter materials","authors":"Yanzi Yu, Cheng Zhang, Jiuzheng Zhang, Yaohua Wu, Rui Deng, Yu Wu, Jinming Cai","doi":"10.1088/1742-6596/2790/1/012006","DOIUrl":"https://doi.org/10.1088/1742-6596/2790/1/012006","url":null,"abstract":"\u0000 The filtration efficiency and resistance during the process of fluid flowing through filter materials is significantly influenced by the characteristic of filter materials, especially for air-filter materials which generally have a multi-fiber composite structure. Therefore, it is important to pay attention to the filtration efficiency and resistance of multi-fiber filter materials. In this study, theoretical equations of filtration efficiency and resistance were proposed based on uniform and multi-fiber composite filter materials, and series of experimental verifications had been implemented. The results indicated that the experimental results verified the theoretical equations well, which may accelerate the research and development of new air-filter materials.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"63 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2792/1/012006
D. Bruzl, L. Bocian, P. Sokola, J. Másilko, M. Sedlačík, J. Svec, E. Bartonickova, F. Šoukal
In recent years, the development of advanced materials for applications in self-cleaning surfaces and antimicrobial coatings has received considerable attention due to its potential impact on environmental sustainability and public health. Among the emerging materials, metal oxide-based photocatalysts have shown promise in addressing these challenges. In this context, the present study focuses on the promise sol-gel synthesis and potential photocatalytic properties of TiO2@ZnO (x = 0.6 - 0.9) nano-scaled particles, with particular emphasis on their applications in self-cleaning and microbial coatings. The choice of TiO2@ZnO (x = 0.6 - 0.9) as the subject of investigation is driven by the advantageous properties of both titanium dioxide (TiO2) and zinc oxide (ZnO). TiO2 is known for its exceptional photocatalytic activity, while ZnO is known for its antimicrobial properties. By combining these two metal oxides in a controlled manner, we aim to harness their synergistic effects to create a multifunctional material with enhanced performance. A titanium (IV) isopropoxide and zinc acetate dihydrate have been used as precursors for the so-gel process. The synthesised powders were evaluated by X-ray diffraction analysis and Raman spectroscopy to determine the allotropy of TiO2 and possible lattice distortions. The optical band gap (Egap) was evaluated by molecular reflection UV-VIS spectroscopy. In addition, size and morphology were determined by scanning electron microscopy (SEM).
{"title":"Sol gel synthesis of TiO2@ZnO composites for self-cleaning and antimicrobial coating","authors":"D. Bruzl, L. Bocian, P. Sokola, J. Másilko, M. Sedlačík, J. Svec, E. Bartonickova, F. Šoukal","doi":"10.1088/1742-6596/2792/1/012006","DOIUrl":"https://doi.org/10.1088/1742-6596/2792/1/012006","url":null,"abstract":"\u0000 In recent years, the development of advanced materials for applications in self-cleaning surfaces and antimicrobial coatings has received considerable attention due to its potential impact on environmental sustainability and public health. Among the emerging materials, metal oxide-based photocatalysts have shown promise in addressing these challenges. In this context, the present study focuses on the promise sol-gel synthesis and potential photocatalytic properties of TiO2@ZnO (x = 0.6 - 0.9) nano-scaled particles, with particular emphasis on their applications in self-cleaning and microbial coatings. The choice of TiO2@ZnO (x = 0.6 - 0.9) as the subject of investigation is driven by the advantageous properties of both titanium dioxide (TiO2) and zinc oxide (ZnO). TiO2 is known for its exceptional photocatalytic activity, while ZnO is known for its antimicrobial properties. By combining these two metal oxides in a controlled manner, we aim to harness their synergistic effects to create a multifunctional material with enhanced performance. A titanium (IV) isopropoxide and zinc acetate dihydrate have been used as precursors for the so-gel process. The synthesised powders were evaluated by X-ray diffraction analysis and Raman spectroscopy to determine the allotropy of TiO2 and possible lattice distortions. The optical band gap (Egap) was evaluated by molecular reflection UV-VIS spectroscopy. In addition, size and morphology were determined by scanning electron microscopy (SEM).","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"19 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2792/1/012003
T. Staněk, H. Szklorzová, D. Kubátová, A. Rybová
In our conditions, mainly flue gas desulfurization gypsum (FGD gypsum) is used as a cement setting regulator. When cement is ground, it decomposes into hemihydrate or even anhydrite as the temperature rises. The ground cement is placed in a storage silo where the increased temperature is compounded by increased pressure and the cement properties are affected by the moisture released and by the change in the phase composition of the setting regulator. Under laboratory conditions, hemihydrate and anhydrite II and III were prepared from one type of FGD gypsum. Their purity was monitored by X-ray diffraction analysis and differential thermal analysis. The prepared calcium sulfates were used in different proportions as setting regulators in the laboratory preparation of Portland cements. Technological properties such as strength and solidification were then determined for cements. The hydration process was monitored by the calorimetric method.
在我国，主要使用烟气脱硫石膏作为水泥凝结调节剂。水泥在研磨时，会随着温度的升高分解成半水合物甚至无水石膏。研磨后的水泥被放置在储存仓中，温度升高加上压力增加，水泥的性能会受到释放的水分和凝结调节剂相组成变化的影响。在实验室条件下，用一种烟气脱硫石膏制备了半水石膏和无水石膏 II 和 III。通过 X 射线衍射分析和差热分析监测了它们的纯度。制备的硫酸钙以不同比例用作实验室制备波特兰水泥的凝固调节剂。然后测定水泥的技术特性，如强度和凝固性。水化过程通过量热法进行监测。
{"title":"Effect of different forms of calcium sulfate on the properties of cement","authors":"T. Staněk, H. Szklorzová, D. Kubátová, A. Rybová","doi":"10.1088/1742-6596/2792/1/012003","DOIUrl":"https://doi.org/10.1088/1742-6596/2792/1/012003","url":null,"abstract":"\u0000 In our conditions, mainly flue gas desulfurization gypsum (FGD gypsum) is used as a cement setting regulator. When cement is ground, it decomposes into hemihydrate or even anhydrite as the temperature rises. The ground cement is placed in a storage silo where the increased temperature is compounded by increased pressure and the cement properties are affected by the moisture released and by the change in the phase composition of the setting regulator. Under laboratory conditions, hemihydrate and anhydrite II and III were prepared from one type of FGD gypsum. Their purity was monitored by X-ray diffraction analysis and differential thermal analysis. The prepared calcium sulfates were used in different proportions as setting regulators in the laboratory preparation of Portland cements. Technological properties such as strength and solidification were then determined for cements. The hydration process was monitored by the calorimetric method.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"18 35","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012016
Juan Li, Pengpeng Lyu, Zhonghao Qian
Timely and effective location of faults in distribution networks is important for restoring power supply and dealing with faults. In this paper, a method combining matrix algorithm and genetic algorithm (GA) is proposed to determine the fault section. Firstly, the matrix algorithm is applied to locate the fault section initially by combining the alarm information uploaded from the feeder terminal unit (FTU). Secondly, in order to deal with the problem of outputting wrong location results, the switching function of the active distribution network is constructed to check the location results calculated by the matrix, and the results that do not meet the checking will be treated as a suspicious fault set, and the relevant evaluation function is constructed and optimized using the genetic algorithm, so as to arrive at the correct fault zone location results. The results of the example simulation show that the method used in this paper can achieve fast and fault-tolerant fault location in active distribution networks.
{"title":"Combination of Matrix and Genetic Algorithms for Fault Location of Active Distribution Network","authors":"Juan Li, Pengpeng Lyu, Zhonghao Qian","doi":"10.1088/1742-6596/2774/1/012016","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012016","url":null,"abstract":"\u0000 Timely and effective location of faults in distribution networks is important for restoring power supply and dealing with faults. In this paper, a method combining matrix algorithm and genetic algorithm (GA) is proposed to determine the fault section. Firstly, the matrix algorithm is applied to locate the fault section initially by combining the alarm information uploaded from the feeder terminal unit (FTU). Secondly, in order to deal with the problem of outputting wrong location results, the switching function of the active distribution network is constructed to check the location results calculated by the matrix, and the results that do not meet the checking will be treated as a suspicious fault set, and the relevant evaluation function is constructed and optimized using the genetic algorithm, so as to arrive at the correct fault zone location results. The results of the example simulation show that the method used in this paper can achieve fast and fault-tolerant fault location in active distribution networks.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"21 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2795/1/012014
Minghui Wang
The fiber laser, an innovative laser type, holds immense significance in optical communication, industrial processing, and scientific research owing to its remarkable high power and efficiency combination. The 1550nm light wave, widely utilized in fiber communication, renders the research and production of fiber lasers in this range pivotal for diverse applications. Within the pages of this paper, we delve into the intricate design and meticulous investigation of an erbium-doped fiber laser operating within the 1550nm-1600nm band. Our noteworthy achievement lies in the adept attainment of laser emission at 1575 nm. This success is intricately woven into the reciprocal reflection of pump light within the resonant cavity of the fiber laser and the nuanced electronic transition process of erbium ions. This paper not only unfolds a detailed exploration of the structural nuances but also unveils the design principles, methodology, and results of MATLAB simulations employed in crafting erbium-doped fiber lasers. Exhibiting exemplary performance at the 1550nm wavelength, this laser proves promising in realms such as optical communication and medical applications, signalling a paradigm shift in the possibilities within these domains. The research presented herein introduces avant-garde concepts for designing high-performance fiber lasers, providing a rich foundation for further exploration in related fields. Through this comprehensive discourse, we aim to contribute not only to the advancement of fiber laser technology but also to the expansion of possibilities in optical communication and beyond.
{"title":"1550nm-1600nm design and research of Erbium-doped fiber lasers","authors":"Minghui Wang","doi":"10.1088/1742-6596/2795/1/012014","DOIUrl":"https://doi.org/10.1088/1742-6596/2795/1/012014","url":null,"abstract":"\u0000 The fiber laser, an innovative laser type, holds immense significance in optical communication, industrial processing, and scientific research owing to its remarkable high power and efficiency combination. The 1550nm light wave, widely utilized in fiber communication, renders the research and production of fiber lasers in this range pivotal for diverse applications. Within the pages of this paper, we delve into the intricate design and meticulous investigation of an erbium-doped fiber laser operating within the 1550nm-1600nm band. Our noteworthy achievement lies in the adept attainment of laser emission at 1575 nm. This success is intricately woven into the reciprocal reflection of pump light within the resonant cavity of the fiber laser and the nuanced electronic transition process of erbium ions. This paper not only unfolds a detailed exploration of the structural nuances but also unveils the design principles, methodology, and results of MATLAB simulations employed in crafting erbium-doped fiber lasers. Exhibiting exemplary performance at the 1550nm wavelength, this laser proves promising in realms such as optical communication and medical applications, signalling a paradigm shift in the possibilities within these domains. The research presented herein introduces avant-garde concepts for designing high-performance fiber lasers, providing a rich foundation for further exploration in related fields. Through this comprehensive discourse, we aim to contribute not only to the advancement of fiber laser technology but also to the expansion of possibilities in optical communication and beyond.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"14 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012101
Shichuan Chen, Xielin Shen, Bo Yuan, Weiwen Peng, Hua Ye, Zhiping Lei
For remote distribution networks, low voltage is prevalent, which seriously affects the normal use of electricity. Aiming at solving the voltage sag/dip problems in 10.5 kV distribution networks, a hybrid UPQC with a shunt single-phase rectifier and a series three-phase inverter is proposed in this paper. The shunt single-phase rectifier is connected to the feeder lines with the highest and lowest voltage phases to supply enough energy to the series inverter, and the three-phase inverter compensates the voltage deviation by injecting active power through a series transformer, such that the voltage sag/dip problems can be mitigated. The control strategies of the two converters are designed in detail in this paper. Compared with the traditional UPQC with two three-phase converters, the proposed method has the advantage of simpler control methods and lower cost. Finally, the proposed method is verified through MATLAB/Simulink model.
{"title":"Low-voltage Compensation of Distribution Networks Based on A Hybrid UPQC with Single and Three-phase Converters","authors":"Shichuan Chen, Xielin Shen, Bo Yuan, Weiwen Peng, Hua Ye, Zhiping Lei","doi":"10.1088/1742-6596/2774/1/012101","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012101","url":null,"abstract":"\u0000 For remote distribution networks, low voltage is prevalent, which seriously affects the normal use of electricity. Aiming at solving the voltage sag/dip problems in 10.5 kV distribution networks, a hybrid UPQC with a shunt single-phase rectifier and a series three-phase inverter is proposed in this paper. The shunt single-phase rectifier is connected to the feeder lines with the highest and lowest voltage phases to supply enough energy to the series inverter, and the three-phase inverter compensates the voltage deviation by injecting active power through a series transformer, such that the voltage sag/dip problems can be mitigated. The control strategies of the two converters are designed in detail in this paper. Compared with the traditional UPQC with two three-phase converters, the proposed method has the advantage of simpler control methods and lower cost. Finally, the proposed method is verified through MATLAB/Simulink model.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"13 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2792/1/012005
K. Šádková, V. Pommer, E. Vejmelková, D. Koňáková
With the scarcity of raw materials, energy intensiveness and environmental burden connected with producing Portland cement, there is a growing need to find substitute binders. Thermally activated clay also appears to be a suitable material for partial cement replacement. However, not all clays are the same. It depends very much on the place of collection, its chemical and phase composition, and the activation temperature. This study compared six different types of clays fired at 600 °C in terms of quantitative phase analysis and mechanical strength results. In addition to the fineness of grinding and firing temperature, the clay composition had an immense impact on mechanical properties. Content of illite up to 20% was found to be beneficial, as this clay reached the highest mechanical strengths. Regarding the quartz, its presence did not harm the overall performance of thermally activated clays and the presence of calcite could cause the improvement of the mechanical strengths. However, the clay with the most miscellaneous composition caused the deterioration of compressive strength but reached much higher bending strength compared to pure cement.
由于生产硅酸盐水泥的原材料稀缺、能源密集和环境负担沉重，人们越来越需要寻找替代粘结剂。热活化粘土似乎也是部分替代水泥的合适材料。然而，并非所有粘土都是一样的。这在很大程度上取决于采集地点、化学成分和相组成以及活化温度。本研究比较了在 600 °C 下烧制的六种不同类型粘土的定量相分析和机械强度结果。除了研磨细度和烧制温度外，粘土成分对机械性能也有很大影响。伊利石含量达到 20% 会带来好处，因为这种粘土的机械强度最高。至于石英，它的存在不会损害热活化粘土的整体性能，而方解石的存在可提高机械强度。不过，成分最杂的粘土会导致抗压强度下降，但与纯水泥相比，其抗弯强度要高得多。
{"title":"Mechanical properties of blended cements affected by impurities in thermally activated clays","authors":"K. Šádková, V. Pommer, E. Vejmelková, D. Koňáková","doi":"10.1088/1742-6596/2792/1/012005","DOIUrl":"https://doi.org/10.1088/1742-6596/2792/1/012005","url":null,"abstract":"\u0000 With the scarcity of raw materials, energy intensiveness and environmental burden connected with producing Portland cement, there is a growing need to find substitute binders. Thermally activated clay also appears to be a suitable material for partial cement replacement. However, not all clays are the same. It depends very much on the place of collection, its chemical and phase composition, and the activation temperature. This study compared six different types of clays fired at 600 °C in terms of quantitative phase analysis and mechanical strength results. In addition to the fineness of grinding and firing temperature, the clay composition had an immense impact on mechanical properties. Content of illite up to 20% was found to be beneficial, as this clay reached the highest mechanical strengths. Regarding the quartz, its presence did not harm the overall performance of thermally activated clays and the presence of calcite could cause the improvement of the mechanical strengths. However, the clay with the most miscellaneous composition caused the deterioration of compressive strength but reached much higher bending strength compared to pure cement.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012100
Jiayi Wang, Jianqiang Kou, Yankun Xia, Dianbo Zhou, Mingfu You
The drastic fluctuations in temperature and humidity in the switchgear environment can lead to condensation, posing the threat to the safe and dependable operation of power equipment. In response to the limitations of current anti-condensation measures, a new anti-condensation system for high-voltage switchgear is proposed. Firstly, this research provides an overview of the cause of condensation and the present situation of relevant prevention technologies. Secondly, a new anti-condensation system for high-voltage switchgear is presented. Drawing upon existing anti-condensation technology, this system effectively addresses prevalent issues such as high air humidity and facile condensation in high-voltage switchgear. Electric field simulation calculations, conducted using COMSOL simulation software, demonstrate that the system does not compromise the normal operation of the switchgear. Finally, practical applications show that the robust operational stability of the system. It consistently achieves precise heat dissipation and dehumidification in high-voltage switchgear, which has high application value.
{"title":"Research and Application of New Anti-Condensation System of High-Voltage Switchgear","authors":"Jiayi Wang, Jianqiang Kou, Yankun Xia, Dianbo Zhou, Mingfu You","doi":"10.1088/1742-6596/2774/1/012100","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012100","url":null,"abstract":"\u0000 The drastic fluctuations in temperature and humidity in the switchgear environment can lead to condensation, posing the threat to the safe and dependable operation of power equipment. In response to the limitations of current anti-condensation measures, a new anti-condensation system for high-voltage switchgear is proposed. Firstly, this research provides an overview of the cause of condensation and the present situation of relevant prevention technologies. Secondly, a new anti-condensation system for high-voltage switchgear is presented. Drawing upon existing anti-condensation technology, this system effectively addresses prevalent issues such as high air humidity and facile condensation in high-voltage switchgear. Electric field simulation calculations, conducted using COMSOL simulation software, demonstrate that the system does not compromise the normal operation of the switchgear. Finally, practical applications show that the robust operational stability of the system. It consistently achieves precise heat dissipation and dehumidification in high-voltage switchgear, which has high application value.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"8 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The small waste cigarette butts every year worldwide added up is a significant threat to the environment. The main component of cigarette butts is cellulose acetate, which is an excellent film-forming material. Here, a one-step phase transition method was employed to successfully convert waste cigarette butts into a transparent film. This film (160×18×0.5 mm) derived from waste cigarette butts (CB) has high mechanical strength (fracture stress 23.5 MPa, Young’s modulus 13.1 MPa), good thermal stability, and excellent optical transmittance (91.8%), and low haze (40.3%). Its properties rival those of traditional low-density polyethylene (PE) film. Meanwhile, the CB film displayed fascinating bending-ability and folding resistance. The cigarette butt-derived film with low cost and excellent properties exhibits a promising application as agricultural mulch and provides recycle solution for waste cigarette butts.
{"title":"Preparation and application of waste cigarette butts-derived mulch film with excellent mechanical properties and optical transparency","authors":"Xianjie Liu, Sijun Huang, Genrong Li, Qiuquan Zhang, Haitao Zhang, Youyu Yang, Fengjie He, Donghong Sun, Zhipan Ma, Jufen Huang","doi":"10.1088/1742-6596/2790/1/012005","DOIUrl":"https://doi.org/10.1088/1742-6596/2790/1/012005","url":null,"abstract":"\u0000 The small waste cigarette butts every year worldwide added up is a significant threat to the environment. The main component of cigarette butts is cellulose acetate, which is an excellent film-forming material. Here, a one-step phase transition method was employed to successfully convert waste cigarette butts into a transparent film. This film (160×18×0.5 mm) derived from waste cigarette butts (CB) has high mechanical strength (fracture stress 23.5 MPa, Young’s modulus 13.1 MPa), good thermal stability, and excellent optical transmittance (91.8%), and low haze (40.3%). Its properties rival those of traditional low-density polyethylene (PE) film. Meanwhile, the CB film displayed fascinating bending-ability and folding resistance. The cigarette butt-derived film with low cost and excellent properties exhibits a promising application as agricultural mulch and provides recycle solution for waste cigarette butts.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"103 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012020
Mingran Su, Anan Zhang, Zemin Gong
As one of the most important equipment in the operation of power system, ensuring the safe and stable operation of power transformer is a prerequisite for ensuring the normal supply of power grid. The failure of the power transformer will lead to the interruption of the power supply of the power grid and cause huge losses to the national economy. With the rapid development of China’s power grid scale and the continuous improvement of the intelligent construction of modern power system, the number of power equipment such as transformers is increasing. Therefore, it is necessary to make timely and accurate judgment on the status of key power transformation and distribution equipment in the power system, and grasp the operation of electrical equipment in real time, so as to ensure the reliability of power supply in the power system. This paper takes 220kV oil-immersed transformer as the research object. This paper considers the problems and characteristics of the current transformer fault diagnosis methods. By making full use of dissolved gas analysis (DGA) information in oil, a method for diagnosing faults in electrical transformers based on particle swarm optimization and generalized regression neural networks has been proposed. The simulation comparison experiment is carried out to select the most suitable transformer intelligent diagnosis method based on oil chromatographic data.
{"title":"Intelligent Diagnosis Method of Transformer Based on Oil Chromatographic Data","authors":"Mingran Su, Anan Zhang, Zemin Gong","doi":"10.1088/1742-6596/2774/1/012020","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012020","url":null,"abstract":"\u0000 As one of the most important equipment in the operation of power system, ensuring the safe and stable operation of power transformer is a prerequisite for ensuring the normal supply of power grid. The failure of the power transformer will lead to the interruption of the power supply of the power grid and cause huge losses to the national economy. With the rapid development of China’s power grid scale and the continuous improvement of the intelligent construction of modern power system, the number of power equipment such as transformers is increasing. Therefore, it is necessary to make timely and accurate judgment on the status of key power transformation and distribution equipment in the power system, and grasp the operation of electrical equipment in real time, so as to ensure the reliability of power supply in the power system. This paper takes 220kV oil-immersed transformer as the research object. This paper considers the problems and characteristics of the current transformer fault diagnosis methods. By making full use of dissolved gas analysis (DGA) information in oil, a method for diagnosing faults in electrical transformers based on particle swarm optimization and generalized regression neural networks has been proposed. The simulation comparison experiment is carried out to select the most suitable transformer intelligent diagnosis method based on oil chromatographic data.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"51 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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