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Research progress on low dielectric constant modification of cellulose insulating paper for power transformers

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 991-1009 doi: 10.1007/s11705-022-2259-7

Abstract: Cellulose insulating paper is the main insulating component of power transformers.Cellulose is used to produce power-transformer insulating papers owing to its excellent electrical propertiesThe dielectric constant of a cellulose insulating paper can be effectively reduced by chemical or physicalFinally, some recommendations for future modified cellulose insulating paper research and applicationsThis paper can provide a reference for further research on low dielectric constant cellulose insulating

Keywords： low dielectric constant     chemical and physical modification     cellulose insulating paper     transformer    

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Detailed analysis of PCBs and PCDD/Fs impurities in a dielectric oil sample (ASKAREL Nr 1740) from an imported transformer in China

Jun HUANG, Yamei HUI, Toru MATSUMURA, Gang YU, Shubo DENG, Makoto YAMAUCHI, Changmin WU, Norimasa YAMAZAKI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 195-204 doi: 10.1007/s11783-013-0527-y

Abstract: Homolog and congener profiles of polychlorinated biphenyls (PCBs), polychlorinated dibenzo- - dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in commercial PCBs formulations are useful information for the source appointment of PCBs contamination as well as the risk assessment caused by potential exposure. Dielectric oil (ASKAREL Nr 1740) in an imported transformer found in China was sampled and analyzed by isotope dilution technology using high resolution gas chromatography-high resolution mass spectrometry (HRGC/HRMS). The detailed homolog and congener profiles of PCBs obtained were compared with those of known Aroclor formulations. High similarity in the homolog profile between the oil sample and Aroclor 1260 was found, with the hexachlorinated and heptachlorinated biphenyls accounting for more than 80.2% of the total PCBs concentration. Severn indicator PCBs contribute about 30%, while 12 PCB congeners (i.e., #153, #143, #168, #180, #149, #165, #138, #170, #190, #187, #174, #181) account for more than 50% of the total PCB concentrations. Total concentration of PCDDs, PCDFs and dioxin-like PCBs (DL-PCBs) was found to be 740 ng TEQ/g, of which 620 ng TEQ/g came from DL-PCBs. The contribution of PCDDs to the total TEQ was neglectable. The concentration of PCDFs homologs follows the order of OCDF>HxCDFs>HpCDFs>PeCDFs>TeCDFs, which is in consistence with the previous study on Aroclor 1260. Three DL-PCBs congeners (i.e., #118, #156, #157) accounted for 77% of the total concentration of DL-PCBs, also they contribute 72% in the TEQ caused by DL-PCBs.

Keywords： dibenzo-p-dioxins (PCDDs)     polychlorinated dibenzofurans (PCDFs)     Askarel transformer     insulatingfluid    

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Retraction note to: Industrial bio-based plant aggregates as hygric and insulating construction materials

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-021-2039-9

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Industrial bio-based plant aggregates as hygric and insulating construction materials for energy efficient

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1532-1532 doi: 10.1007/s11705-020-1960-7

Abstract: In this paper, the bulk density, microstructure, porosity and pore size distribution of the selected aggregates, including hemp shiv, flax shiv, rape shiv and wheat straw, are fully studied due to these properties are highly related to their excellent characteristics and more or less linked to the properties of the final product. The scanning electron microscope results showed all the selected aggregates have a highly porous and complex hierarchical structure, whereas the arrangement of pores and the thickness of cell wall are significantly different among these aggregates. All the selected aggregates had a low bulk density ranging from 30 to 130 kg∙m and a high porosity between 75.81% and 88.74%. The thermal conductivity of the selected bio-aggregates ranged from 0.04 to 0.06 W∙m ∙K . The thermal conductivity of the selected aggregates was not only depending on the bulk density of the sample but also depending on the raw material. Hemp shiv, rape shiv and flax shiv were excellent hygric regulators with moisture buffer value ( ) ranging from 2.07 to 2.36 g∙m ∙%RH , whereas, wheat straw had a lower MBV value ranging from 1.76 to 1.97 g∙m ∙%RH . The results showed that particle size does not affect the value. The value increases linearly with bulk density.

Keywords： bio-based aggregates     density     porosity     thermal conductivity     hygric properties    

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Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

Frontiers in Energy 2022, Volume 16, Issue 3,   Pages 429-444 doi: 10.1007/s11708-021-0747-y

Abstract: The intermediate fluid vaporizer (IFV), different from other liquefied natural gas (LNG) vaporizers,Moreover, studies on the fluid flow and heat transfer behaviors of the supercritical LNG inside the tubesand the condensation heat transfer of the intermediate fluid outside the tubes are summarized.

Keywords： intermediate fluid vaporizer     design of structure and intermediate fluid     condensation heat transfer    

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Review of fluid and control technology of hydraulic wind turbines

Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 312-320 doi: 10.1007/s11465-017-0433-2

Abstract:

This study examines the development of the fluid and control technology of hydraulic wind turbinesThe current state of hydraulic wind turbines as a new technology is described, and its basic fluid model

Keywords： wind turbine     hydraulic system     fluid model     control technology    

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Computational fluid dynamics simulation of aerosol transport and deposition

Yingjie TANG, Bing GUO

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 362-377 doi: 10.1007/s11783-011-0365-8

Abstract: In this article computational fluid dynamics (CFD) simulation of aerosol transport and deposition, i.e

Keywords： computational fluid dynamics (CFD)     aerosol     transport     deposition    

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Investigation of carbon dioxide photoreduction process in a laboratory-scale photoreactor by computational fluid

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1149-1163 doi: 10.1007/s11705-021-2096-0

Abstract: The novelty of this work is the computational fluid dynamic model combined with the novel carbon dioxide

Keywords： carbon dioxide photoreduction     computational fluid dynamic simulation     kinetic model     Langmuir adsorption    

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Wind-induced vibration control of Hefei TV tower with fluid viscous damper

Zhiqiang ZHANG , Aiqun LI , Jianping HE , Jianlei WANG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 249-254 doi: 10.1007/s11709-009-0038-x

Abstract: The Hefei TV tower is taken as an analytical case to examine the control method with a fluid viscousFinally, a dynamic model is proposed to study the wind-induced vibration control analysis using viscous fluidwind-induced responses and the wind vibration input energy of the tower are decreased greatly by using a fluid

Keywords： high-rise structure     wind-induced response     fluid viscous damper     vibration control    

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Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1525-8

Abstract:

• Effect of gastric fluid on EDCs adsorption-desorption to microplastics

Keywords： Microplastics     Gastric fluid     Endocrine-disrupting chemicals     Adsorption     Desorption    

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Detection of digestive malignancies and post-gastrectomy complications via gastrointestinal fluid examination

Lei Huang,Aman Xu

Frontiers of Medicine 2017, Volume 11, Issue 1,   Pages 20-31 doi: 10.1007/s11684-016-0493-4

Abstract: Herein, the current progress in the relationship between gastrointestinal fluid analyses and GC is systematicallyGastrointestinal fluid examination could also predict the adverse effects of postgastrectomy, such asGastric fluid markers should be further studied to reveal the early predicators of malignancy and complications

Keywords： gastrointestinal fluid     gastric carcinoma     biomarker     diagnosis     prognosis     gastrectomy     adverse events    

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Static and dynamic analysis of functionally graded fluid-infiltrated porous skew and elliptical nanoplates

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 477-502 doi: 10.1007/s11709-023-0918-5

Abstract: The analysis of static bending and free and forced vibration responses of functionally graded fluid-infiltrated

Keywords： static bending     free and forced vibrations     nonlocal theory     isogeometric analysis     fluid-infiltrated    

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Introduction to the special section on the Symposium on Computational Fluid Dynamics and Molecular Simulation

Tianwei TAN, Peiyong QIN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 241-241 doi: 10.1007/s11705-009-0285-3

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Hydrotreating of light gas oil using a NiMo catalyst supported on activated carbon produced from fluid

N. Rambabu,Sandeep Badoga,Kapil K. Soni,A.K. Dalai,J. Adjaye

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 161-170 doi: 10.1007/s11705-014-1430-1

Abstract: Nitric acid functionalized steam activated carbon (NAFSAC) was prepared from waste fluid petroleum coke

Keywords： activated carbon     fluid petroleum coke     NiMo catalyst     hydrotreating     light gas oil    

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effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer fluid

Hulin HUANG, Xiaoming ZHOU,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 155-160 doi: 10.1007/s11708-009-0063-4

Abstract: In this two-layer fluid system, the upper layer fluid is the electrically non-conducting encapsulant

Keywords： fields     thermocapillary convection     critical temperature difference     oscillatory convection     two-layer fluid    

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Title Author Date Type Operation

Research progress on low dielectric constant modification of cellulose insulating paper for power transformers

Journal Article

Detailed analysis of PCBs and PCDD/Fs impurities in a dielectric oil sample (ASKAREL Nr 1740) from an imported transformer in China

Jun HUANG, Yamei HUI, Toru MATSUMURA, Gang YU, Shubo DENG, Makoto YAMAUCHI, Changmin WU, Norimasa YAMAZAKI

Journal Article

Retraction note to: Industrial bio-based plant aggregates as hygric and insulating construction materials

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Journal Article

Industrial bio-based plant aggregates as hygric and insulating construction materials for energy efficient

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Journal Article

Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

Journal Article

Review of fluid and control technology of hydraulic wind turbines

Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI

Journal Article

Computational fluid dynamics simulation of aerosol transport and deposition

Yingjie TANG, Bing GUO

Journal Article

Investigation of carbon dioxide photoreduction process in a laboratory-scale photoreactor by computational fluid

Journal Article

Wind-induced vibration control of Hefei TV tower with fluid viscous damper

Zhiqiang ZHANG , Aiqun LI , Jianping HE , Jianlei WANG ,

Journal Article

Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics

Journal Article

Detection of digestive malignancies and post-gastrectomy complications via gastrointestinal fluid examination

Lei Huang,Aman Xu

Journal Article

Static and dynamic analysis of functionally graded fluid-infiltrated porous skew and elliptical nanoplates

Journal Article

Introduction to the special section on the Symposium on Computational Fluid Dynamics and Molecular Simulation

Tianwei TAN, Peiyong QIN,

Journal Article

Hydrotreating of light gas oil using a NiMo catalyst supported on activated carbon produced from fluid

N. Rambabu,Sandeep Badoga,Kapil K. Soni,A.K. Dalai,J. Adjaye

Journal Article

effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer fluid

Hulin HUANG, Xiaoming ZHOU,

Journal Article