Bibliografie tematiche / Eco-Friendly insulating gas

Letteratura scientifica selezionata sul tema "Eco-Friendly insulating gas"

Autore: Grafiati

Pubblicato: 1 giugno 2024

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Articoli di riviste sul tema "Eco-Friendly insulating gas":

Guney, Ezgi, e Okan Ozgonenel. "An Eco-Friendly Gas Insulated Transformer Design". Energies 14, n. 12 (21 giugno 2021): 3698. http://dx.doi.org/10.3390/en14123698.

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Electricity companies around the world are constantly seeking ways to provide electricity more safely and efficiently while reducing the negative impact on the environment. Mineral oils have been the most popular transformer insulation, having excellent electrical insulating properties, but have many problems such as high flammability, significant cleaning problems, and are toxic to fish and wildlife. This paper presents an alternative approach to mineral oil: a transformer design that is clean and provides better performance and environmental benefits. A 50 kVA, 34.5/0.4 kV gas insulated distribution transformer was designed and evaluated using the COMSOL Multiphysics environment. R410A was used as insulation material. R410A is a near-azeotropic mixture of difluoromethane (CH2F2, called R-32) and pentafluoro ethane (C2HF5, called R-125), which is used as a refrigerant in air conditioning applications. It has excellent properties including environmentally friendly, no-ozone depletion, low greenhouse effect, non-explosive and non-flammable, First, the breakdown voltage of the selected gas was determined. The electrostatic and thermal properties of the R410A gas insulated transformer were investigated in the COMSOL environment. The simulation results for the performance of oil and SF6 gas insulated transformers using the same model were compared. The gas-insulated transformer is believed to have equivalent performance and is an environmentally friendly alternative to current oil-based transformers.

Deng, Jiayan, Min Peng, Zhanyang Gao, Yi Wang, Baoshan Wang, Wenjun Zhou, Ruichao Peng e Yunbai Luo. "Synthesis and dielectric properties of the eco-friendly insulating gas thiazyl trifluoride". RSC Advances 10, n. 5 (2020): 2740–46. http://dx.doi.org/10.1039/c9ra09256k.

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Zhang, Lei, Ruichao Peng, Yanjun Huang, Guangsen Song e Yi Wang. "Toxic Study on the New Eco-Friendly Insulating Gas Trifluoromethanesulfonyl Fluoride: A Substitute for SF6". Sustainability 14, n. 9 (26 aprile 2022): 5239. http://dx.doi.org/10.3390/su14095239.

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It has been proven that the gas trifluoromethanesulfonyl fluoride (CF3SO2F) has good dielectric performance and the potential to replace the potent greenhouse gas sulfur hexafluoride (SF6), which is the most commonly used insulating gas in high-voltage electrical equipment. However, there are many key biochemical properties, such as toxicity, that the new eco-friendly insulating gas will need to obtain. It could protect the operator and equipment and help the chemical engineering development of this gas in the power grid industry. In this study, according to Horn’s method, an acute toxic gas inhalation test was carried out. The results showed that the lethal concentration of 50% (LC50) for female rats was 27.1 g/m3, and that for male rats was 23.3 g/m3. The behavioral and vital sign changes in the rats were recorded. Pathological sections of the main organs revealed that the heart, lungs, spleen, and eyes suffered the most damage from the gas. This research also provides scientific suggestions for the protection of electrical workers exposed to the insulating gas CF3SO2F.

Choi, Eun-Hyeok. "UHF High-sensitivity Diagnostic Sensor Design for Eco-friendly Insulating Gas". Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 36, n. 2 (28 febbraio 2022): 22–27. http://dx.doi.org/10.5207/jieie.2022.36.2.022.

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Alassaad, Farjallah, Karim Touati, Daniel Levacher e Nassim Sebaibi. "Thermal behavior of light earth used for building insulation: Insight on PCM introduction impact". Journal of Physics: Conference Series 2069, n. 1 (1 novembre 2021): 012120. http://dx.doi.org/10.1088/1742-6596/2069/1/012120.

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Abstract To reduce building significant contribution to greenhouse gas emissions, architects and engineers are seeking eco-friendly construction solutions. Among investigated options, building’s thermal insulation and heat storage can be cited. In this regard, earth-based materials are attracting particular interest. These last years, there is a renewed interest in these eco-friendly building materials and techniques. This is due to many advantages that they present: excellent humidity regulation ability and high thermal inertia. Present study aims to improve light earth thermal properties. Specifically, this research work focuses on the development of an insulating and heat storing material. To achieve this, phase change materials (PCM) are incorporated in soil-natural fiber mixtures. In fact, different light earth samples are first prepared. Then, thermally characterized to highlight the impact of PCM on the light earth thermal insulating, heat storing properties and thermal response to changing boundary conditions. The incorporation of PCM showed an interesting improvement of the light earth thermal properties namely on thermal conductivity, specific heat capacity, and thermal comfort time.

Li, Yi, Shuangshuang Tian, Linlin Zhong, Geng Chen, Song Xiao, Yann Cressault, Yuwei Fu et al. "Eco-friendly gas insulating medium for next-generation SF₆-free equipment". iEnergy 2, n. 1 (marzo 2023): 14–42. http://dx.doi.org/10.23919/ien.2023.0001.

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Wu, Dong, Wengui Chen e Zelin Ji. "Simulation Analysis of Arc-Quenching Performance of Eco-Friendly Insulating Gas Mixture of CF3I and CO2 under Impulse Arc". Journal of Electrical and Computer Engineering 2024 (18 maggio 2024): 1–12. http://dx.doi.org/10.1155/2024/8604095.

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Due to its superior insulating qualities, SF6 gas is extensively used in the power sector. However, because of its poor environmental protection properties, finding ecologically acceptable insulating gas has become a critical challenge in the power sector in the context of pursuing green electricity. This work simulates the arc-quenching performance of a gas mixture of CF3I and CO2, which is thought to be a workable substitute for SF6 gas. The COMSOL software is used to build a two-dimensional model of a single-pipe arc-quenching chamber based on the concepts of magnetohydrodynamics (MHD) theory. The lightning impulse current is made by applying electrical stimulation to pure CO2 gas, gas mixtures with 10% CF3I and 90% CO2, and gas mixtures with 30% CF3I and 70% CO2 in the single-pipe arc-quenching chamber. During the first stage of arc formation, the results show that CF3I/CO2 gas mixtures with 10% and 30% CF3I have lower electrical conductivity than pure CO2 gas. An 8/20 μs lightning impulse current waveform with a magnitude of 4 kA is used for this observation. The highest airflow velocity for pure CO2 is 1744 m/s, but the mixture of 10%/90% CF3I/CO2 has a maximum airflow velocity of 1593 m/s. The 30%/70% CF3I/CO2 mixture has the highest maximum airflow velocity at 1840 m/s. Airflow velocity increases and the overpressure in the arc-quenching chamber is prolonged when there is a greater concentration of CF3I gas in the gas mixture. Consequently, these factors greatly reduce the duration of the arc-extinguishing time. The arc-quenching chamber’s overpressure is extended when the amount of CF3I gas in the gas mixture is increased, which increases the velocity of the airflow. As a result, these factors significantly decrease the duration of the arc-extinguishing time.

Masson, J. F., S. Bundalo-Perc e P. Mukhopadhyaya. "Measurement of thermal conductivity of building insulation foams by modulated differential scanning calorimetry — Critical review & observations". International Review of Applied Sciences and Engineering 3, n. 2 (1 dicembre 2012): 157–62. http://dx.doi.org/10.1556/irase.3.2012.2.9.

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Abstract The rise in energy prices, the need to conserve energy and the pressure to protect the environment promote the development of innovative eco-friendly thermal insulating foams for building applications. In this quest, a rapid and accurate method to measure the thermal conductivity of new foams is required during the research and product development stage. Temperature-modulated differential scanning calorimetry (MDSC) provides thermal conductivity values from heat capacity measurements on cylindrical samples less than about 20 mg in weight. This method is the basis of the ASTM E1952 standard method “Thermal Conductivity and Thermal Diffusivity by Modulated Differential Scanning Calorimetry”. In this work, the MDSC and the ASTM E1952 test methods are applied to thermal insulating foams used in construction applications. Measurements on polystyrene, polyurethane, and polyisocyanurate insulations demonstrate that MDSC possesses excellent repeatability, but its application through ASTM E 1952 provides inaccurate thermal conductivity values. Two sources of errors were identified, 1) the use of nitrogen as a purge gas, and 2) the use of an equation that inaccurately relates the measured heat capacity to thermal conductivity. Methods around these difficulties exist, but they remain untested with insulating foams.

Wu, Peng, Yi Li, Song Xiao, Junyi Chen, Ju Tang, Dachang Chen e Xiaoxing Zhang. "SnO2 nanoparticles based highly sensitive gas sensor for detection of C4F7N: A new eco-friendly gas insulating medium". Journal of Hazardous Materials 422 (gennaio 2022): 126882. http://dx.doi.org/10.1016/j.jhazmat.2021.126882.

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Castiñeira Suárez, Manuel, T. Ballweber, A. Moser, M. Schaak e K. Ermeler. "Influence of Oxygen-containing Filling Gas Mixtures on the Interruption Capability of MV Load Break Switches". PLASMA PHYSICS AND TECHNOLOGY 10, n. 2 (31 agosto 2023): 107–10. http://dx.doi.org/10.14311/ppt.2023.2.107.

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Nowadays SF6 is commonly used as filling gas for medium voltage load break switches due to its outstanding insulating and arc-quenching properties. However, due to its high global warming potential the interrupting performance of alternative eco-friendly gases are investigated for such devices. This contribution investigates the thermal interruption capability of a medium voltage load break switch using two different oxygen-containing gas mixtures: dry air and a mixture of nitrogen, oxygen and carbon dioxide. The findings indicate an improved performance in comparison to pure nitrogen when considering an admixture of oxygen. In gas mixtures containing 80\% nitrogen, the addition of oxygen results in an enhanced thermal interruption capability compared to an equivalent proportion of carbon dioxide.

Più fonti

Tesi sul tema "Eco-Friendly insulating gas":

Ye, Fanchao. "Fault decomposition characteristics and application feasibility assessment of C4F7N-CO2-O2 mixed insulating gas". Electronic Thesis or Diss., Orléans, 2023. http://www.theses.fr/2023ORLE1030.

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Dans ce travail de doctorat, une étude théorique et expérimentale systématique a été menée sur l'isolation du mélange de gaz C4F7N-CO2-O2 respectueux de l'environnement et ses caractéristiques de décomposition et de biosécurité sous défauts électriques et thermiques. Sur la base de la méthode de dynamique moléculaire ReaxFF, le processus de décomposition thermique du mélange gazeux sous différentes teneurs en O2 et températures est simulé. En combinant les résultats simulés avec des essais de décomposition thermique, le processus cinétique de décomposition thermique du mélange gazeux et le mécanisme d'évolution de ses sous-produits dans différentes conditions sont révélés. En même temps, le mécanisme d'influence de la teneur en O2 sur la tension de claquage et les valeurs caractéristiques statistiques du mélange C4F7N-CO2-O2 pour des décharges partielles sont analysés et le mécanisme d'influence de différents facteurs sur la génération et l'inhibition des gaz et des sous-produits solides au cours du processus de décomposition par décharge du mélange gazeux est clarifié. En conclusion, sur la base des résultats de simulation et expérimentaux, nous proposons la quantité optimale d'additif O2 et les composants caractéristiques de diagnostic du mélange gazeux C4F7N-CO2-O2 pour les défauts des équipements isolés au gaz moyenne tension ; nous testons la biosécurité du C4F7N et de ses produits de décomposition après l'exposition à l'arc, puis évaluons la faisabilité, la sécurité de l'application du mélange de gaz C4F7N-CO2-O2 dans l'équipement en combinant avec les caractéristiques isolantes et de décomposition électrique et thermique du mélange de gaz C4F7N-CO2-O2 et, les résultats de la biosécurité
In this doctoral work, a systematic theoretical and experimental study has been carried out on the insulation of environmentally friendly C4F7N-CO2-O2 gas mixture and on its decomposition characteristics and biosafety under electrical and thermal faults. Based on the ReaxFF molecular dynamics method, the thermal decomposition process of the gas mixture under different O2 contents and temperatures is simulated. The kinetic process of the thermal decomposition of the gas mixture and the evolution mechanism of its by-products under different conditions are revealed by combining with thermal decomposition tests. Meanwhile, the influence mechanism of O2 content on the breakdown voltage and partial discharge statistical characteristic values of the C4F7N-CO2-O2 mixture is analyzed, and the influence mechanism of different factors on the generation and inhibition of gas and solid by-products during the discharge decomposition process of the gas mixture is clarified. In conclusion, based on the simulation and experimental results, we propose the optimal O2 additive amount and fault diagnosis characteristic components of C4F7N-CO2-O2 gas mixture for medium-voltage gas-insulated equipmentwe test the biosafety of C4F7N and its arc decomposition products, and then evaluate the feasibility and safety of applying C4F7N-CO2-O2 gas mixture in equipment by combining with the insulating and electrical and thermal decomposition characteristics of C4F7N-CO2-O2 gas mixture and the results of the biosafety

Li, Yalong. "Research on the decomposition characteristics and biosafety of C5F10O/N2/O2 mixed insulating gas". Electronic Thesis or Diss., Orléans, 2023. http://www.theses.fr/2023ORLE1050.

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Dans ce travail de thèse de doctorat, des études expérimentales et théoriques sont réalisées sur les caractéristiques de décomposition du mélange gazeux C5F10O/N2/O2 à l'interface gaz-solide de matériaux métalliques et sous l'action d'une décharge électrique dans un appareil de coupure électrique. La faisabilité et la sécurité de son utilisation sont évaluées en combinaison avec la biosécurité du gaz C5F10O et des produits de décomposition du gaz plasmagène. Compte tenu du contact long entre le mélange gazeux C5F10O/N2/O2 et les matériaux internes de l'équipement de coupure électrique pendant son fonctionnement, la stabilité de l'interaction gaz-solide du mélange gazeux avec les métaux couramment utilisés (cuivre, aluminium et argent), à l'intérieur de l'équipement est caractérisé, et le mécanisme d'interaction gaz-solide entre le mélange gazeux C5F10O et les matériaux métalliques est précisé. Un défaut thermique peut également se produire pendant le fonctionnement de l'équipement. Les caractéristiques typiques de la décharge et de la décomposition par défaut thermique du mélange gazeux C5F10O/N2/O2 contenant différentes concentrations d'oxygène sont identifiées. La composition et les processus de création des produits de décomposition du mélange gazeux sont obtenues, et la corrélation entre les types et le contenu des produits de décomposition caractéristiques et les types de défaut, ainsi que la réaction de l'oxygène vers les produits de décomposition du mélange gazeux C5F10O et le mécanisme d'inhibition de la précipitation des produits solides sont analysés. Sur la base de ce travail, nous proposons un schéma d'optimisation de la stabilité de la couche protectrice argent- cuivre est proposé pour le cuivre avec une faible stabilité gaz-solide du gaz C5F10O/N2/O2. Nous avons défini les produits caractéristiques de la décharge et du défaut thermique du mélange gazeux, ce qui constitue une référence pour la surveillance en ligne des défauts. Nous avons testé la biosécurité du C5F10O et des produits de décomposition par arc. Sa sécurité d'application a été évaluée en fonction des caractéristiques de décharge et de décomposition thermique du mélange gazeux, et des mesures et de protection ciblées et des suggestions sont proposées
In this doctoral thesis work, experimental and theoretical studies are carried out on the decomposition characteristics of C5F10O/N2/O2 gas mixture at the gas-solid interface of metal materials and under the discharge and thermal action, and the feasibility and safety of its application are evaluated in combination with the biosafety of C5F10O gas and arc decomposition products of C5F10O/N2/O2. Considering the long-term contact between C5F10O/N2/O2 gas mixture and the internal materials of the equipment during normal operation, the gas-solid interaction stability of C5F10O/N2/O2 gas mixture with commonly used metal copper, aluminum and silver inside the equipment is evaluated, and the mechanism of gas-solid interface interaction between C5F10O gas mixture and metal materials is clarified. Discharge and thermal fault may also occur during the long-term operation of the equipment. The failure decomposition mechanism of C5F10O/N2/O2 gas mixture is studied through experiments and simulations. The typical discharge and thermal fault decomposition characteristics of C5F10O/N2/O2 gas mixture containing different concentrations of oxygen are revealed. The composition and generation rules of decomposition products of the gas mixture under the faults are obtained, and the correlation between the types and contents of characteristic decomposition products and the fault types, as well as the regulation of oxygen to C5F10O gas mixture decomposition products and the inhibition mechanism of solid product precipitation are analyzed. In conclusion, based on the simulation and experimental results, we proposed the stability optimization scheme of silver-plated protective layer on copper surface for metal copper material with poor gas-solid stability of C5F10O/N2/O2 gas. We extracted the characteristic products characterizing the discharge and thermal fault of C5F10O/N2/O2 gas mixture, which provided a reference for the on-line fault monitoring based on the decomposition components. We tested the biosafety of C5F10O and its arc decomposition products, and evaluated its application safety based on the discharge and thermal fault decomposition characteristics of C5F10O/N2/O2 gas mixture, and proposed targeted safety protection measures and suggestions

Capitoli di libri sul tema "Eco-Friendly insulating gas":

Maladen, R., C. Preve e D. Piccoz. "Validation of a New Eco-friendly Insulating Gas for Medium and High Voltage Equipment". In Lecture Notes in Electrical Engineering, 171–81. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58172-9_19.

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Atti di convegni sul tema "Eco-Friendly insulating gas":

Li, Y., X. Zhang, Z. Wei, Y. Wang, Y. Li e S. Xiao. "Study on the acute inhalation toxicity of eco-friendly gas insulating medium C5-PFK". In 22nd International Symposium on High Voltage Engineering (ISH 2021). Institution of Engineering and Technology, 2021. http://dx.doi.org/10.1049/icp.2022.0219.

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Wu, Yuewei, Xiaochun Bai, Jian Wu, Pinghai Lv, De Ding e Xiaobing Yu. "New research progress on synthesis and properities of eco-friendly insulating gas heptafluoroisobutyronitrile((i-C4F7N))". In 2020 7th International Conference on Information Science and Control Engineering (ICISCE). IEEE, 2020. http://dx.doi.org/10.1109/icisce50968.2020.00386.

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Zhuo, Ran, Jing Liu, Mingli Fu, Yi Jing, Yan Luo e Haoyong Song. "Effect of oxygen on the thermal decomposition of eco-friendly gas insulating medium C4F7N-CO2". In 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2020. http://dx.doi.org/10.1109/ichve49031.2020.9279640.

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Yakovlev, Grigory, Jadvyga Keriene, Anastasiia Gordina, Irina Polyanskikh e Milan Bekmansurov. "Efficient Eco-friendly Composite Fluorine Anhydrite-Based Materials". In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.009.

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The paper presents possible ways of utilizing technogenic waste – fluorine anhydrite – by its use in production of dry mortars and piece goods from lightweight concrete with expanded polystyrene, as a organic filler, for low-rise construc-tion. The developed dry mortars are based on fluorine anhydrite binder and complex modifier comprising curing activator (sulfate or alkaline) and finely dispersed additive. The fluorine anhydrite-based compositions have improved physical and performance characteristics, including the improved strength and average density and reduced water absorption compared to the control composition. The developed lightweight anhydrite polystyrene concrete has the density grade of 700 kg/m3 and good vapor and gas permeability. The concrete is stabile while using and fire safe, because each granule of expanded poly-styrene is coated with anhydrite matrix, and has the strength sufficient for structural and heat insulating slabs and blocks. All mentioned compositions are eco-friendly and are in great demand for low-rise construction. Therefore the manufacturing of these compositions will consume a large amount of technogenic waste and will reduce the environmental load on the region where the waste is located.

Li, Xiaolin, Wenxiong Mo, Dibo Wang, Wei Wang, Ran Zhuo e Yan Luo. "Experimental Study on Compatibility of C6F12O/CO2 Gas Mixture with Eco-friendly Insulating Medium and Copper". In 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2020. http://dx.doi.org/10.1109/ichve49031.2020.9279625.

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Li, L., P. Han, Q. Yao, B. Deng, Y. Zhang, S. Xiao, Y. Li, C. Lin e Y. Chen. "Research on the power frequency breakdown characteristics of a new eco-friendly gas insulating medium HFO-1336mzz(E)". In 22nd International Symposium on High Voltage Engineering (ISH 2021). Institution of Engineering and Technology, 2021. http://dx.doi.org/10.1049/icp.2022.0449.

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Kim, Nam-Hoon, Dong-Eon Kim, Sung-Wook Kim e Gyung-Suk Kil. "Comparative Analysis of Partial Discharge Characteristics of an Eco-Friendly Insulation Gas". In 2022 6th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST). IEEE, 2022. http://dx.doi.org/10.1109/icepe-st51904.2022.9757132.

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Wu, Yuewei, Chen Shen, Jian Wu, De Ding, Xiaochun Bai, Pinghai Lv e Xiaobing Yu. "Experimental research on the breakdown characteristics of multicomponent eco-friendly insulation gas mixture". In 2023 International Conference on Optoelectronic Materials and Devices, a cura di Nianbing Zhong e Yang Yue. SPIE, 2024. http://dx.doi.org/10.1117/12.3025014.

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Nechmi, H. E., A. Beroual, A. Girodet e P. Vinson. "Fluoronitriles / CO2 gas mixture as an eco-friendly alternative candidate to F6 in high voltage insulation systems". In 2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP). IEEE, 2016. http://dx.doi.org/10.1109/ceidp.2016.7785493.

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