Аннотация. Построена компьютерная модель системы заряда емкостного накопителя (ЕН) на основе индуктивно-емкостного преобразователя (ИЕП) в среде MATLAB. Особенностью предлагаемой системы заряда ЕН является выполнение ИЕП на основе гибридного электромагнитного элемента-многофункционального интегрированного электромагнитного компонента. По результатам моделирования определены параметры ИЕП для заряда ЕН током неизменной формы, обеспечивающим максимальный КПД, произведен выбор наиболее оптимального схемотехнического решения с использованием ИЕП для построения на его основе силовой части системы заряда ЕН реального объекта. Таким образом, с помощью модели оптимизирован режим работы системы заряда, выбраны необходимые параметры устройства. Применение ИЕП позволяет обеспечить постоянство значения тока в цепи 375 © Электронный научный журнал «Нефтегазовое дело». 2015. №4 http://www.ogbus.ru нагрузки, независимо от состояния ЕН. Это позволяет экономично использовать установленную мощность повышающего трансформатора, исключить броски тока при включении емкости на заряд и обеспечить линейное нарастание напряжения на заряженной емкости, что обеспечивает максимальный КПД. Произведена оценка энергетической эффективности для разных режимов заряда емкостного накопителя. Среднециклический КПД в режиме заряда ЕН не постоянным током составляет 51%, КПД в режиме заряда ЕН постоянным током составляет 89%.
Introduction. The co-authors analyze the sources and consumers of thermal power in the Far North and the Arctic region. The co-authors describe industrial, fire, and environmental hazards coming from existing heating systems that consume burned hydrocarbons. The co-authors propose an alternative system that uses electro-thermal technologies.Subject of research. Electro-thermal systems designated for the maintenance of the operation of industrial and social facilities in the Far North and the Arctic region.Objective. Substantiation of the need to have flame heating systems, which are currently in operation, replaced by highly efficient, safe and eco-friendly electro-thermal heating systems in the Far North and the Arctic region.Materials and methods. The co-authors analyze thermal power generation in the environment characterized by extremely low temperatures.Findings. The co-authors describe several heating sources that comprise electro-thermal technologies, applicable in the Far North and the Arctic region.Conclusions. Electro-thermal heating systems boost heat transmission and power efficiency of heating systems due to their high controllability. They can also reduce the environmental impact, caused by strong heat flows produced by flame furnaces onto the climate of the Far North and the Arctic region.
Introduction: the systems of thermal effects on thermo-dependent, viscous and highly viscous liquids under conditions of the Arctic and the Extreme North are considered. Low efficiency and danger of heating systems based on burned hydrocarbons, heated liquids and steam are shown. Electrothermal heating systems used to maintain thermo-dependent fluids in a fluid state are considered. The evaluation of the effectiveness of the application of the most common electrothermal system — heating cables (tapes). The most effective electrothermal system based on induction technologies has been determined. Materials and methods: considered methods of thermal exposure to maintain the fluid properties of thermo-dependent fluids at low extreme temperatures. Results: presents an induction heating system and options for its implementation in the Extreme North and the Arctic. Conclusions: induction heating system to minimize loss of product quality, improve the system performance under changing process conditions, eliminate fire product, to reduce the influence of the human factor.
Introduction: there is much concern about power supply to small and remote villages and industrial facilities, such as crude oil and gas fields, in the present-day power industry. Systems using renewable energy sources are the most innovative solutions to this problem. The need for electric energy storage units complicates the use of renewable energy sources. Versatile types of storage units, working on different principles, are in use now. Flywheels, working on the principle of mechanical accumulation of energy, are of particular interest.Methods: both traditional and advanced designs of electric energy accumulation systems are analyzed in the article. Recent advancements in machine building, power engineering and structural materials are contributed into structural elements of an electric energy accumulation system.Results and discussion: basic strengths and weaknesses of electric energy storage units were identified in the course of the analysis. The author substantiated the need for new effective electric energy storage units working on the principle of mechanical accumulation of potential and kinetic energy. The conclusion is that advanced engineering solutions, such as flywheels and energy efficient reversible electric machines, can boost the efficiency of electric power storage systems. The solution underlying the design of an energy efficient storage unit is offered to electric power industry players.Conclusion: the storage unit under development has flywheels and energy efficient reversible electric machines. It improves the energy efficiency of both classical power generation systems and those using renewable energy sources.
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