ABSTRACT
THE CONTENT OF THE ABSTRACT
Introduction
1. Tasks of the research
2. Goal of the research
3. Goal Setting
4. Solution of the problem
Conclusions
References
Introduction
The energy crisis can be solved by the use of the inexhaustible, in human terms, sources of energy. One of the alternative energy sources is wind.
1. Tasks of the research
It’s known that with increase in altitude increases and the speed of the wind. Calculation formula the wind speed at the height of the piles[2]:
(1)
where V - the unknown wind speed (m / s), V0 - wind speed at the ground (m / s), H - piles height (m), H0 - altitude where was measured by V0 (m), a - empirically exponent of 0.14 .
In Figure 1 shows the recalculated according to wind speed for different heights of the piles (wind speed on the ground accepted 5 m / s).
Figure 1 - Dependence of the recalculated according to wind speed for different heights of the piles
Instantaneous power of the wind flow is determined by the formula
[7]:
(2)
where Npotok - instantaneous power of the wind flow, P - mass density of air (kgsek ^ 2 / m ^ 4), F - windwheel swept area (m 2), V - wind speed (m / s).
From (2) that the power of the wind flow is proportional to the cube of wind speed.
Calculation of the swept surface of the windwheel:
(3)
where F - of the swept surface of the windwheel (m 2), D - diameter of the windwheel (m).
From (3) follows that develops power is proportional to the square of the wind turbine diameter windwheel.
I proposed a method of "promotion" wind turbine, can increase the power generated by wind turbines by about 1%.
2. Goal of the research
1. Rationale and development of electronic systems increase the efficiency of wind turbines.
2. Simulation of the electronic system "promotion" wind turbine.
3. Goal Setting
In Figure 4 shows a graph of work wind turbine.
Figure 4 the graph of work wind turbine
From Figure 4 shows graph that the work is reminiscent of the hysteresis curve wind turbine.
In the area between the boundary and starting-speed wind turbine can either work or not. It depends on the previous state windwheel, stands or is rotated. By using the method "promotion" there is no this dependence.
4. Solution of the problem
The electronic system determines the state of reading of wind and windwheel. At the time of needed wind speed and windwheel fixation of stiffness electronic system shunts battery charger, thereby causing the battery to untwist the generator.
Block diagram of the system increase the efficiency of wind turbines is shown in figure 5.
Figure 5. Block diagram of the system increase the efficiency of wind turbines
Figure 6 - percent increase generated power dependence on the height of the piles.
Figure 6 - percent increase generated power dependence on the height of the piles.
In Figure 7 shows the generated power, with wind speeds in the aisles: Starting windwheel below the speed, but higher than the boundary velocity, the diameter of the windwheel.
Figure 7 - Dependence of the generated power of the diameter of windwheel
Also of work the electronic system can be represented as a oscillogram figure 8.
Figure 8 - oscillogram of work electronic system
where t - time (s), V - wind speed (m / s), U - the voltage on the output of the generator (V), Relays - relays status (where 0 - open, 1 - is closed).
Conclusions
Method can additionally provide about 1 kW per month. The estimated cost of the electronic system is not more than 50 UAN. Payback period of about 5 years. 1. Фатеев Е.М. Как сделать самому ветроэлектрический агрегат. Государственное энергетическое издательство, 1949 г. – 64 с. 2. Виноградов Н.В., Виноградов Ю.Н. Как самому рассчитать и сделать электродвигатель. ЭНЕРГИЯ, 1974 г. – 164 с. 3. Шефтер И.Я., Рождественский И.В. Изобретателю о ветродвигателях и ветроустановках. Министерства сельского хозяйства СССР, 1957 г. – 145 с. 4. Европейская ассоциация ветроэнергетики (European Wind Energy Association, Бельгия), [Электронный ресурс] - Режим доступа URL: http://www.ewea.org/
References
5. Global Wind Energy Council, [Электронный ресурс] - Режим доступа URL: www.gwec.net/ 6. Климат Донецка, [Электронный ресурс] - Режим доступа URL: http://www.meteoprog.ua/ru/climate/Donetsk/ 7. Шефтер И.Я., Рождественский И.В. Ветронасосные и ветроэлектрические агрегаты. «КОЛОС» Москва, 1967 г. – 372 с. 8. Проектно конструкторское технологическое бюро «КОНКОРД», [Электронный ресурс] - Режим доступа [Электронный ресурс] - Режим доступа URL: http://wind.dp.ua/
9. Каргиев В.М. Ветроэнергетика. Руководство по применению ветроустановок малой и средней мощности. «ИСЦ», 2001 г. – 62 с.
10. Литвиненко А.М. Пособие по изготовлению ветроагрегатов. 17 с.
11. Агеев В.А. Нетрадиционные и возобновляемые источники энергии. (курс лекций) Кафедра теплоэнергетических систем, 2004 г.
12. Перебаскин А.В. Микросхемы для управления электродвигателями (Энциклопедия ремонта. Вып. 12) – 1999г., 291 с. 13. Шефтер Я.И. Использование энергии ветра. «Энергоатомиздат», 1983 г. – 199 с.
14. Рензо Д. Ветроэнергетика. . «Энергоатомиздат», 1982 г. – 271 с.
15. Харитонов В.П. Автономные ветроэлектрические установки. Москва 2006г. – 275 с.
16. Форум. Нетрадиционная энергия. [Электронный ресурс] - Режим доступа URL: http://www.fieldlines.com/
17. Альтернативные источники энергии. [Электронный ресурс] - Режим доступа URL: http://imlab.narod.ru/Energy/Energy.htm
18. Малая энергетика. [Электронный ресурс] - Режим доступа URL: http://rosinmn.ru/
19. Ветроэнергетика. [Электронный ресурс] - Режим доступа URL: http://www.rlocman.ru/wind/
This master's work is not completed yet. Final completion: December 2012. The full text of the work and materials on the topic can be obtained from the author or his head after this date
