Analysis of air wind turbines for electric power generation
Journal Title: Наукові праці Донецького Національного Технічного Університету серія: Електротехніка і Енергетика - Year 2018, Vol 1, Issue 1
Abstract
With the development of electric technologies, scientists are increasingly thinking about how to generate, store and properly transform the energy resources that are in the bowels of the earth: coal, oil and gas, as well as renewable sources: sun, water, wind. Industrial energy is used in generating alternative sources-capital-intensive industry. In order to "catch" the wind, design engineers tend to climb higher. And this, in turn, is quite a complex and resource-intensive task. In offshore energy the Foundation and installation of technologically sound projects are about 30-40% of capital costs, as well as the lease of large areas on which power generating plants are located. The article analyzes innovative wind turbines, namely flying types of wind generators. Such an innovative direction is air wind power, which launches into the sky at a height of 200, 400 or even 1000 meters flying wind power plants-airships, balloons,"kites, drones and other aircraft equipped with wind turbines or drive ground generators with their "leashes". Sorted out in detail what should be the flow of wind speed for the nominal operation of the generating unit. Nature imposes certain restrictions on the use of wind turbines. Everything depends on the average wind speed in the region. It is known that the initial rotation speed of the wind turbine rustles is 2 m/s. At maximum efficiency, the speed of the windmill should be from 9 to 12 m/s. Starting from the wind speed of 4 m/s, the installation of a wind turbine is considered appropriate. The presented calculation of the wind speed for the height at which such aircraft and the power of the wind generator are installed at the maximum absorption of the average annual wind flow rate. A table and a graph of the energy effect of the wind flow, taking into account its speed on the surface area covered by the blades of the wind turbine, are presented. Taking into account all the advantages and disadvantages of this type of alternative energy sources, it is possible to develop a solar-wind air complex (SWАC) connecting solar and wind energy in such a way that it can be used by optimal voluminous flying objects in the form of a ball or airship. The largest area for solar panels with a minimum volume of gaseous filler will allow to raise several-turbine wind turbines using helium traction power. Thus, after a detailed analysis, such flying wind turbines will allow to increase the efficiency of electric power generation several times. At altitudes of more than 1000 meters wind streams are more and more stable, so the generation is almost constant. It will also reduce capital costs for the installation of high overall dimensions on the ground, that will definitely save money. The innovative solar-wind air system is a hybrid system with increased efficiency, compared to standard types of generating systems. Such types of alternative energy sources may be installed on the territory of Ukraine, thereby improving its energy efficiency and economic independence in the future.
Authors and Affiliations
Oleksandr Kollarov, S. SKRYPNYK
Keywords
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