Results 91 to 100 of about 646,559 (302)

Prediction of Dissolved Gas Concentrations in Transformer Oil Based on the KPCA-FFOA-GRNN Model

Energies, 2018
The purpose of analyzing the dissolved gas in transformer oil is to determine the transformer’s operating status and is an important basis for fault diagnosis.
Jun Lin, Gehao Sheng, Yingjie Yan, Jiejie Dai, Xiuchen Jiang   +4 more
doaj   +1 more source

Stress corrosion in titanium alloys and other metallic materials [PDF]

Multiple physical and chemical techniques including mass spectroscopy, atomic absorption spectroscopy, gas chromatography, electron microscopy, optical microscopy, electronic spectroscopy for chemical analysis (ESCA), infrared spectroscopy, nuclear ...
Basu, P. K., Brotzen, F. R., Harkins, C. G., Hightower, J. W., Leith, I. R., Mclellan, R. B., Parris, D. P., Roberts, J. M., Rudee, M. L., Salama, K.   +9 more
core   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

A comprehensive analysis for wind turbine transformer and its limits in the dissolved gas evaluation

Heliyon
This study employs the PRISMA-A methodology to conduct a systematic review of transformer fault diagnostics using Dissolved Gas Analysis (DGA) data. A comprehensive analysis was performed across four major databases—IEEE, Scopus, ScienceDirect (Elsevier),
Ricardo Manuel Arias Velásquez
doaj   +1 more source

Shale Gas Content Calculation of the Triassic Yanchang Formation in the Southeastern Ordos Basin, China

Energies, 2017
Shale gas content is the key parameter for shale gas potential evaluation and favorable area prediction. Therefore, it is very important to determine shale gas content accurately. Generally, we use the US Bureau of Mines (USBM) method for coal reservoirs
Jiao Su, Yingchu Shen, Jin Hao, Bo Liu
doaj   +1 more source

A century of dissolved gas analysis - Part II

Transformers Magazine, 2019
Future brings some changes to DGA. It is expected that offline DGA in standard laboratories will gradually disappear as a routine test and transformers without online DGA will be tested by using simple portable devices. The online sensors will be monitored from a central control room with a sophisticated artificial intelligence in an effort to predict ...
openaire   +4 more sources

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Fault diagnosis method for transformers based on feature selection of dissolved gas in oil

电力工程技术
Dissolved gas analysis is important for the early warning and diagnosis of transformer faults. Aiming at the problems of numerous types of features for dissolved gas in oil and the insufficient analysis of fault associated features, a new fault diagnosis
LIAO Caibo, YANG Jinxin, HU Xiong, QIU Zhibin, LIU Xiaotian, ZHU Wenqing   +5 more
doaj   +1 more source

On-Line Analysis of Oil-Dissolved Gas in Power Transformers Using Fourier Transform Infrared Spectrometry

Energies, 2018
To address the problem of on-line dissolved gas analysis (DGA) of a power transformer, a Fourier transform infrared (FT-IR) spectrometer was used to develop an analysis instrument. Carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), ethane (C2H6),
Xiaojun Tang, Wenjing Wang, Xuliang Zhang, Erzhen Wang, Xuanjiannan Li   +4 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