Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Gabriela Oprina"'
Autor:
Virgil Marinescu, Ana Maria Luchian, Emilia Simona Apostol, Ion Patru, Daniel Lipcinski, Gabriela Oprina, Danut-Ionel Vaireanu, Iosif Lingvay
Publikováno v:
Scopus-Elsevier
This paper presents an exhaustive study regarding the behaviour of copper in various insulating fluids when exposed to 1100C for 1000 hours in closed systems, with no access to atmospheric oxygen. Following the analysis carried out, it was found that
Publikováno v:
Revista de Chimie. 69:1621-1627
The amounts of flammable gases formed in some transformer oils during the long-term storage (1000 hours) at 110 � 3�C in closed containers (limited access to atmospheric oxygen) were determined qualitatively and quantitatively by gas chromatograp
Publikováno v:
Revista de Chimie. 69:1468-1472
The paper aims to present the investigation of H2 adsorption capacity in metal doped nanostructured materials, by using two methods. Carbonic materials are considered to be one of the most promising materials to be used for hydrogen adsorption and st
Publikováno v:
Revista de Chimie. 68:2881-2885
The behaviour of copper and insulation paper in various electrical insulating fluids (transformer oils) exposed to thermal ageing at 110�30C for 1000 hours in closed vessels (without access to atmospheric oxygen) has been studied. The processing of
Autor:
Florentina Serban, Valerica Stanoi, Gabriela Oprina, Livia Carmen Ungureanu, Iosif Lingvay, Alexandra Pica
Publikováno v:
Revista de Chimie. 68:2551-2555
The behaviour of some insulating fluids in contact with copper foil and / or insulation paper under thermal stress (110�30C for 1000 hours), in a closed system (the access of atmospheric oxygen being limited), has been studied by determining the ch
Publikováno v:
International Journal of Modeling and Optimization. 7:145-151
Autor:
Andreea Voina, Dorian Marin, Sorina Mitrea, Daniel Lingvay, Ladislau Radermacher, Gabriela Oprina
Publikováno v:
Revista de Chimie. 68:581-585
The corrosion state of an underground metallic pipeline of �161 mm and 565 m length was assessed by specific electrical and electrochemical measurements. The investigated pipe, buried in 1997, was protected against corrosion by successive layers of
Publikováno v:
Applied Mechanics and Materials. 841:116-121
The paper presents the analytical solution used to calculate the depression which appears under different types of impellers. This solution can be useful as a preliminary calculus to estimate the magnitude of the depression created at different rotat
Publikováno v:
Applied Mechanics and Materials. 811:117-121
The paper presents the operation of a hydraulic closed circuit equipped with a butterfly valve which can close with a step of 10o. Using four pressure transducers and one temperature transducer, the authors determined the volumetric flow rate, the av
Autor:
Gabriela Oprina, Lucia-Andreea Mitulet, Sergiu Nicolaie, Rares-Andrei Chihaia, Adrian Nedelcu, Mihail Popescu
Publikováno v:
Procedia Engineering. 100:1141-1149
The paper presents the achievements of INCDIE ICPE-CA on wind installations provided with counter-rotating turbines. There are envisaged both the development of an experimental model and the results following the testing activities, respectively. The