Results 21 to 30 of about 30,179 (147)

Investigation of the content of unsaturated hydrocarbons in transformer oils using IR spectroscopy

Известия высших учебных заведений: Проблемы энергетики
THE  PURPOSE. To  analyze  the  current  understanding  of  unsaturated  hydrocarbons with  double  C=C  bonds  in  mineral  transformer  oils  and  evaluate  the  effectiveness  of  modern methods of controlling the content of these compounds in oils ...
M. Sh. Garifullin, Y. N. Slobodina, A. R. Bikzinurov, R. A. Giniatullin, V. A. Chernyshov   +4 more
doaj   +1 more source

Evaluation of the lubricating power of sweet almond oil without additives

Dyna, 2018
The lubricity of sweet almond oil (Prunus amygdalus var. Dulcis) was evaluated through Anti Wear (AW) properties and Extreme Pressure (EP) performance in a four-ball tribometer.
Arnoldo Emilio Delgado-Tobón, William Arnulfo Aperador-Chaparro, Rafael Guillermo García Cáceres   +2 more
doaj   +1 more source

CFD Analysis of the Thermal-Hydraulic Performance of Traditional and Alternative Oils for Transformer Cooling

Applied Sciences
The search for alternative, more environmentally friendly coolants to replace mineral oils in power transformers represents a relevant challenge for the power industry.
Elisabetta Salerno, Adriano Leonforte, Mattia Grespan, Diego Angeli, Mauro A. Corticelli   +4 more
doaj   +1 more source

CONTRIBUTIONS TO EVALUATION OF THE BIODEGRADABILITY BY ASPERGILLUS NIGER AND OTHER FUNGI’S OF SOME INSULATING OILS [PDF]

Journal of Sustainable Energy, 2015
Mineral insulating oils used in electrical equipment because of their toxic organic substances and xenobiotic, represents a major risk to the environment - to accidental spills pollute soil, groundwater and surface water.
RADU E., UDREA O., LINGVAY M., SZATMÁRI I., LINGVAY I.   +4 more
doaj  

The Importance of Data Reliability and Usability When Assessing Impacts of Marine Mineral Oil Spills

Toxics, 2021
Spilled mineral oils in the marine environment pose a number of challenges to sampling and analysis. Mineral oils are complex assemblages of hydrocarbons and additives, the composition of which can vary considerably depending on the source oil and ...
A. Dallas Wait
doaj   +1 more source

State-of-the-Art and Future Perspectives of Environmentally Friendly Machining Using Biodegradable Cutting Fluids

Energies, 2021
The use of cutting fluids has played a vital role in machining operations in lubrication and cooling. Most cutting fluids are mineral oil-based products that are hazardous to the environment and the worker, cause severe diseases and pollute the ...
M. Naveed, A. Arslan, H. M. A. Javed, T. Manzoor, M. M. Quazi, T. Imran, Z. M. Zulfattah, M. Khurram, I. M. R. Fattah   +8 more
doaj   +1 more source

Tensão superficial estática de soluções aquosas com óleos minerais e vegetais utilizados na agricultura Surface tension of mineral oils and vegetable oils

Engenharia Agrícola, 2007
O trabalho teve como objetivo avaliar a tensão superficial estática de soluções aquosas com formulações de óleos minerais e vegetais emulsionáveis utilizados como adjuvantes na agricultura.
Cristina G. de Mendonça, Carlos G. Raetano, Cristiane G. de Mendonça   +2 more
doaj   +1 more source

Synthesis and Evaluation of Bio-Lubricants from Renewable Raw Materials

Lubricants
The objective of this study was the evaluation of the production of base oils for lubricants of biological origin using vegetable and used frying oils as feedstock. The production method was based on a two-stage transesterification process.
Dimosthenis Filon, George Anastopoulos, Dimitrios Karonis   +2 more
doaj   +1 more source

INFLUENCE OF A PROLONG APPLICATION OF MINERAL OILS ON BULB YIELD, QUALITY OF CUT FLOWERS AND SPREAD OF VIRUSES IN TULIP CULTIVATION

Acta Scientiarum Polonorum: Hortorum Cultus, 2018
The experiments were designed to evaluate the impact of two mineral oils: Sunspray 850 EC (85% of mineral oil) and Sunspray Ultra-Fine (98.8% of mineral oil) applied for a prolonged time (2 vegetation seasons) on yields of tulip of ‘Leen van der Mark ...
Barbara Marcinek, Katarzyna Karczmarz, Mariusz Szmagara, Wojciech Durlak, Elżbieta Pogroszewska   +4 more
doaj   +1 more source

Study of the Impregnation of Power-Transformer Cellulosic Materials With Dielectric Ester Oils

IEEE Access, 2021
The application of alternative dielectric oils as esters in power transformers is hindered by the lack of knowledge regarding their properties and respecting which are the best techniques to ensure their proper performance.
Jaime Sanz, Oasis Sancibrian, Cristian Olmo, Cristina Mendez, Alfredo Ortiz, Carlos J. Renedo   +5 more
doaj   +1 more source