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Oil and oil-impregnated cellulose paper and pressboard are widely used as insulation materials in converter transformers. The existence of DC component in electric stress imposed on converter transformer insulation unfavorably causes space charge accumulation inside the oil impregnated paper insulation. It has been reported that the water content of oil impregnated paper has an impact on space charge...
The approaches to improve the effectiveness of oil field exploitation using mathematical models of the oil deposit processes for forecast oil well debit are realized. It has been shown that using formula Kolmogorov-Erofeev allowed to receive more adequate model. On the base system analysis of the oil deposit processes was carried out the selection and estimation of important oil deposit parameters...
We describe a method for generating giant (micro sized) lipid vesicles using pneumatic valves and microfluidic T-junction. Water, oil containing lipids, and water were sequentially infused into the microfluidic channel to form bilayer lipid membranes (BLMs) on chambers (Fig. 1). Valves on the back of the chambers were driven pneumatically and pushed the water out of the chamber; consequently the BLMs...
The control and managing of pipelines have been assuming a major importance for all kinds of fluids to be conveyed through. When the fluid is like oil, harmful liquid and/or water for human beings necessity, the monitoring of pipelines becomes extremely fundamental. Based on the reflexion according to fast detecting systems, spectral analysis response is a topic of interest. Among spectral analysis...
Water-in-oil instruments have been developed for field use, both as a portable devices and for continuous on-line measurements and are trademarked as DOMINOs. The unit responds to changes in relative saturation of water in oil that can be related to the water content in paper. As the solubility of water in oil can increase with very aged oils, the water content as a concentration can overestimate...
We investigate the deformation and coalescence of two closely spaced drops of conducting liquid suspended in an insulating fluid under the action of an electric field. The equations governing droplets deformation are derived in the case of drops subjected to a potential difference. The critical conditions for existence of a stationary solution are determined for drops anchored on capillary tubes in...
The life of a transformer is limited to the deterioration of its solid insulation. Winding conductors and other solid insulation materials in oil-immersed transformers have been insulated using cellulose products. For many years, manufacturers have met the needs of special applications by designing transformers using thermally upgraded materials to achieve lighter weight, higher power density and...
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