Results 61 to 70 of about 642,509 (288)
Energies, 2020 This research focuses on problem identification due to faults in power transformers during operation by using dissolved gas analysis such as key gas, IEC ratio, Duval triangle techniques, and fuzzy logic approaches.
Nitchamon Poonnoy +2 more
doaj +1 more source
Dissolved gas analysis: Gas measurement techniques - Part 1
Transformers Magazine, 2023 DGA (Dissolved gas analysis) is a chemical method based on chemical measurements of a few dissolved species in insulating liquids (oils). Although most of the users and diagnose-providing sources consider all DGA measurements as equal, it is important to realize that different gas measurements of gases from oil matrices possess different advantages and
openaire +1 more source
Condition Assessment of High Voltage Power Transformer Using Dissolved Gas Analysis [PDF]
, 2013 Condition monitoring is the process, which is used to monitor parameter of condition in machinery, such that if a significant change occurs it indicates that it may lead to failure of that machine.
Boda, Sonal Sagar +1 more
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Advanced Engineering Materials, EarlyView.Microstructural evolution and hardness optimization along the cross‐section of friction stir welded AA6061/AlSi10MgMn joints, for electric vehicle battery housings, were investigated. Postweld aging between 170°C and 220°C enhances hardness uniformity within the nugget zone.
Emanuele Ghio, Emanuela Cerri
wiley +1 more source
Modeling Nucleation and Growth of Zinc Oxide During Discharge of Primary Zinc-Air Batteries [PDF]
, 2017 Metal-air batteries are among the most promising next-generation energy storage devices. Relying on abundant materials and offering high energy densities, potential applications lie in the fields of electro-mobility, portable electronics, and stationary ...
Horstmann, Birger +3 more
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Advanced Engineering Materials, EarlyView.This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen +3 more
wiley +1 more source
Short-term nitrous oxide emissions from pasture soil as influenced by urea level and soil nitrate [PDF]
, 2004 Nitrogen excreted by cattle during grazing is a significant source of atmospheric nitrous oxide (N2O). The regulation of N2O emissions is not well understood, but may vary with urine composition and soil conditions.
Christofides, Calliopi +2 more
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Rheocasting versus Die Casting: An Insight into the Low‐Cycle Fatigue Behavior of AlSi7Mg0.6
Advanced Engineering Materials, EarlyView.The study compares rheocast lightweight components with high‐pressure die cast materials regarding microstructure and fatigue behavior. Rheocast process offers higher efficiency due to lower casting temperatures. Despite some microstructural differences, both processes show similar strengths (yield strength 125 MPa, tensile strength 240 MPa).
Julia Richter +4 more
wiley +1 more source
Dissolved gas analysis: Gas measurements technologies – Part 2 – Gas Chromatography (GC)
Transformers Magazine, 2023 This is the second part of the column “Gas measurement technologies for DGA”. In Part 1, the principles and problematics of DGA (dissolved gas analysis) were presented as a chemical method based on chemical measurements. The column is mainly intended for non-chemists who are interested in understanding the basics and the main weaknesses of the most ...
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Subcooled flow boiling of fluorocarbons [PDF]
, 1971 A study was conducted of heat transfer and hydrodynamic behavior for subcooled flow boiling of Freon-113, one of a group of fluorocarbons suitable for use in cooling of high-power-density electronic components. Problems arising from the excellent wetting
Bergles A. E., Murphy, Richard Walter
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