Natural energy reserves are unevenly distributed, making shortages of energy resources common in many countries. This is an incentive for three things: looking for less expensive imports, saving energy and developing alternative heat and energy sources. According to industry professionals, coal-water fuel (also known as CWF or coal slurry) is a promising product. CWF isRead More
Reliability and efficiency of modern electrical grids depends on power transformers. Transformer failures are down time can be very costly. All things considered (the cost of a new transformer, disposal of the failed transformer, transportation, installation etc), the expenses may run into millions of dollars. The primary cause of transformer failure is damaged insulation, whichRead More
The contamination of transformer oil during transportation and storage is not only particulate matter, but also water and gases from the air. The oil begins to age, and its parameters degrade: acid number and dissipation factor grow, while its dielectric strength decreases. This makes drying and degassing of oil imperative to keep the oil inRead More
Wind Turbine Flushing is a process used in many types of industrial equipment to prevent faults related to the oil system. This article deals with oil flushing of hydraulic systems and wind turbine gearboxes. The purpose of Wind Turbine flushing When oil filled equipment is operated, several processes influence the quality of oil. These areRead More
Both natural materials (bleaching clays, natural bauxites and zeolites) and synthetic substances (silica gel, aluminum oxide, alumina silicate catalyst and synthetic zeolite) are used for adsorption purification of mineral oil. Bleaching clay, silica gel, aluminum oxide and alumina silicate are used mostly for waste oil regeneration. Aluminum silicate used as adsorbents vary widely in chemicalRead More
Literature contains much information on using bitumen emulsions in road construction. Damaged bitumen surfaces Surface damage. The beginning of surface damage is easily visible after rain. The first indications of surface destruction can be identified by finding wet spots on an otherwise dry surface. These may be caused by insufficient binder content in the surface,Read More
Practical experience of marine power plant operation shows that their reliability, mean time between failures and time before overhaul depends on operation parameters related to fuel quality. Many river vessels use diesel fuel and fuel oil for propulsion. Fuel always contains sulfur and its sulfuric compounds (mercaptans, sulfides, disulfides etc). These substances reduce quality andRead More
Any oil used in electrical equipment must comply with certain requirements. I.e. its quality and parameters must not be below the values stated in regulatory documents and equipment manuals. Any deviation may lead to transformer malfunction and outrage. Some of the most important indications of oil quality are its dielectric strength, moisture and gas content.Read More
Both production volume and consumption of biodiesel have been growing due to two main factors. First, the global environmental deterioration, caused mainly by the emissions from burning fossil fuel. Second, this deterioration caused tightening of exhaust emission regulations. Many countries have adopted laws to gradually increase the share of biodiesel used as fuel. The selectionRead More
Vacuum is understood as a certain area of space with pressure less than that of the ambient atmosphere. There is also the concept of the ideal or absolute vacuum: a space totally devoid of matter. However, achieving this condition is impossible. The former definition is usually used. The degrees of vacuum The range of pressuresRead More
Petroleum based oils have a wide range of industrial uses. They lubricate, dissipate heat and provide electrical insulation in high voltage systems. The oils age in use, their performance degrades and ultimately, a large amount of potentially hazardous waste is generated. This article deals with: disposal of oil; oil regeneration; oil re-refining. Used oil disposalRead More
A seminar on purification and regeneration of industrial oils, as well as power transformer servicing, was held in Mexico City on 29 November 2018. This seminar became one of the most attended events recently held by GlobeCore. The number of participants reached approximately 100, representing 40 companies from Mexico, Salvador and Guatemala, which are relatedRead More
GlobeCore began in 1969. It was then when a new company, originally serving the agricultural industry, was formed. Today GlobeCore is a world leader in the production of oil purification and filtration machines. In this article we show the progress of our company in the last 50 years. The focus of purification and regeneration ofRead More
Removal of heavy metals and neutralization of heavy metals are words instantly familiar to all environmental scientists and wastewater purification specialists. In this article we will discuss the existing methods of removal of heavy metals, analyze benefits and limitations and will suggest techniques to improve efficiency of wastewater purification. What are the heavy metals HeavyRead More
One of the largest events in the Central American electric energy industry, Concapan-2018, was held on 7 – 9 November in San Salvador. GlоbeCore participated in the event in cooperation with out partner, Grupo Saytec S. A. de C. V. Visitors of our combined exhibition booth were able to see the the CMM-4/7 unit. ThisRead More
Dielectric strength is an indicator used to assess insulation properties of transformer oil. It is very often equated with breakdown voltage, but their numerical values are not equal. Breakdown voltage is a minimum voltage applied to an insulation, resulting in its breaking down and becoming electrically conductive. At the same time dielectric strength is aRead More
One of the main reasons of failures and damages of turbine oil systems (regulating, lubricating and shaft sealing) is loss of performance properties of turbine oils. It is due to the fact that some energy facilities are at a final stage of their exploitation. Besides the existing methods of oil analysis as well as equipmentRead More
Depending on the voltage class, the preventive maintenance of a power transformer may be performed from once a year to once every four years. This process is most often performed by a three man team, with the transformer taken offline. The maintenance includes a clear sequence of certain operations. First, general transformer condition is checked.Read More
The importance of analyzing transformer oil is well known and undisputed. Beside the information on the current condition of the insulation fluid, the analysis also reveals other problems: aging of cellulose insulation, partial discharges etc. Full and abbreviated analysis can be performed on the transformer oil. The process of transformer maintenance has been rapidly developingRead More
GlobeCore invites all power industry professionals to visit our seminar, which will be held in Mexico City (Ramada Mexico Reforma Hotel) on 29 November 2018, starting at 8.00 a.m. In the course of the seminar we will cover current issues of electrical insulation oil purification and regeneration, as well as improvement of transformer reliability andRead More
