Presentation

Hello,

It is obvious that energy holds an indispensable place in the lives of many people and that we need energy for using many technological products that make our lives easier. In the recent years, there is a growing tendency for the renewable resources as the source of this energy that we need. It makes us hopeful that the negative effect of the renewable energy resources on the nature is quite low and that they start to become the alternatives for other energy resources. The study that we have carried out is related to the wind energy turbines which are still designed in different shapes and used. Our objective is to develop a system that will increase the capacity and whose operation is quite easy. Some power tables which are described in detail in the patent application documents and power calculation papers are presented below for your analysis. In these theoretical calculations, the mechanical losses of the system and the losses resulting from the fact that the wings which may be called under-wing screen each other for a short period during the circular movement are not taken into consideration. Even if these losses are considered as 4-5% in total, when the capacity percentages in the tables are taken into consideration, it will be seen that the overall capacity of the system will be higher compared to the previously-used systems. As is known, in the systems planned and used so far, the capacity rate was 45% at maximum. In order to reach this capacity rate, big wing radius was needed in the wind turbines having especially a horizontal axis. If we look into the advantages and disadvantages of this system under main titles:

As it is shown in the tables, the efficient of the system is quite higher compared to the others.
• Compared to the other systems, the design and plan of the system is simpler and the system elements are lighter.
• The cost of this system will be less compared to the other systems.
Since the equipments of the system are close to the ground, the operation and maintenance of the system is quite easy.
• The control elements to be used for directing the wings in the system are less in number compared to the ones used in wind turbines having a horizontal axis, their design is simpler and they are more functional and economical.
• At many various wind speed values, the system can be used with a growing efficiency.
• It is needed that the alternators carrying out energy conversion at different wind speeds should be in accordance with the energy dependant on the wind speed or the system should be controlled in any way.

a-) If the system is desired to be taken under control, we resign some of the energy that we can make use of.
b-) And if we want to use appropriate alternator windings, it would charge us additional costs.

In the system that we have planned, on the other hand, instead of the alternators with special winding, more economical and commercially available alternators can be used, therefore optimum benefit can be obtained from the available energy potential without requiring any alternator with special winding.

• The shaft that the power of the wings used in the prior wind turbines having a vertical axis transmit does not need to be stretched against its bending and declining tendency due to the effect of the wind. Since the mobile parts to be placed under the wing arms and the wing arms carrying the loads will be in contact with the construction ground, it is not possible for the shaft to bend or decline.
• The fact that the system is very close to the ground will provide stability.
• The fact that the stability in the system is quite high compared to the turbines having a horizontal axis and that the horizontal area that the system occupies is small provide an important advantage for the off-shore applications.

To criticize our system, we can give an example: Let us suppose that there is a boiler full of wind energy. We see that a glass whose volume is bigger and which can be filled with a ratio of 43-45% is used in the other systems, while in our system a glass can be used whose volume is smaller but can be filled by a ratio of 69-70%. Consequently, it is quite normal that both of the systems have some advantages and disadvantages, there is no ideal system.

For my part, your critics and suggestions are very important, which is very professional, and hoping that you will not make me deprived of your contributions I thank you very much for your interest.

NOTE : In these systems where we have made theoretical calculations for different constructions, a better arrangement can be made for “C” wing length, the total capacity of the system by preferring the optimum one can be increased by 2-3%.

NOTE : As can be seen from the tables, no matter how low is the radius (2R) and the number of cycles (rpm), the capacity increases to that extent.


Table - 1
Rpm
(min-1)
V
(m/s)
2R
(m)
H
(m)
C
(m)
N
 
Ptotal
(Nm/s)
Ppotan
(Nm/s)
Efficient
( ɳ )
50 4 1 20 0,3 4 390 680 0,5749
50 7 1 20 0,3 4 2299 3644 0,6310
50 8 1 20 0,3 4 3483 5440 0,6400
50 10 1 20 0,3 4 6943 10625 0,6535
50 12 1 20 0,3 4 12158 18360 0,6622
50 14 1 20 0,3 4 19489 29155 0,6685
50 16 1 20 0,3 4 29295 43520 0,6731
50 18 1 20 0,3 4 41936 61965 0,6767
50 20 1 20 0,3 4 57773 85000 0,6797


Table - 2
Rpm
(min-1)
V
(m/s)
2R
(m)
H
(m)
C
(m)
N
 
Ptotal
(Nm/s)
Ppotan
(Nm/s)
Efficient
( ɳ )
70 4 1 20 0,3 4 355 680 0,5224
70 7 1 20 0,3 4 2190 3644 0,6010
70 8 1 20 0,3 4 3341 5440 0,6141
70 10 1 20 0,3 4 6720 10625 0,6325
70 12 1 20 0,3 4 11837 18360 0,6447
70 14 1 20 0,3 4 19050 29155 0,6534
70 16 1 20 0,3 4 28724 43520 0,6600
70 18 1 20 0,3 4 41214 61965 0,6651
70 20 1 20 0,3 4 56881 85000 0,6692


Table - 3
Rpm
(min-1)
V
(m/s)
2R
(m)
H
(m)
C
(m)
N
 
Ptotal
(Nm/s)
Ppotan
(Nm/s)
Efficient
( ɳ )
50 4 1,3 20 0,3 4 352 920 0,3834
50 7 1,3 20 0,3 4 2182 4930 0,4427
50 8 1,3 20 0,3 4 3330 7360 0,4526
50 10 1,3 20 0,3 4 6704 14375 0,4664
50 12 1,3 20 0,3 4 11814 24840 0,4756
50 14 1,3 20 0,3 4 19021 39445 0,4822
50 16 1,3 20 0,3 4 28683 58880 0,4872
50 18 1,3 20 0,3 4 41604 83835 0,4962
50 20 1,3 20 0,3 4 56818 115000 0,4940


Table - 4
Rpm
(min-1)
V
(m/s)
2R
(m)
H
(m)
C
(m)
N
 
Ptotal
(Nm/s)
Ppotan
(Nm/s)
Efficient
( ɳ )
50 4 1,3 20 0,4 4 487 880 0,5536
50 7 1,3 20 0,4 4 2962 4716 0,6280
50 8 1,3 20 0,4 4 4508 7040 0,6405
50 10 1,3 20 0,4 4 9045 13750 0,6578
50 12 1,3 20 0,4 4 15905 23760 0,6694
50 14 1,3 20 0,4 4 25568 37730 0,6777
50 16 1,3 20 0,4 4 38515 56320 0,6838
50 18 1,3 20 0,4 4 55226 80190 0,6887
50 20 1,3 20 0,4 4 76181 110000 0,6926


Table - 5
Rpm
(min-1)
V
(m/s)
2R
(m)
H
(m)
C
(m)
N
 
Ptotal
(Nm/s)
Ppotan
(Nm/s)
Efficient
( ɳ )
50 4 2 20 0,64 4 655 1344 0,4873
50 7 2 20 0,64 4 4357 7203 0,6049
50 8 2 20 0,64 4 6715 10752 0,6245
50 10 2 20 0,64 4 13693 21000 0,6520
50 12 2 20 0,64 4 24326 36288 0,6701
50 14 2 20 0,64 4 39382 57624 0,6834
50 16 2 20 0,64 4 59630 86016 0,6932
50 18 2 20 0,64 4 85838 122472 0,7001
50 20 2 20 0,64 4 118773 168000 0,7070


Table - 6
Rpm
(min-1)
V
(m/s)
2R
(m)
H
(m)
C
(m)
N
 
Ptotal
(Nm/s)
Ppotan
(Nm/s)
Efficient
( ɳ )
50 4 3 20 0,9 4 -- -- --
50 7 3 20 0,9 4 5261 10933 0,4812
50 8 3 20 0,9 4 8311 16320 0,5093
50 10 3 20 0,9 4 17486 31875 0,5486
50 12 3 20 0,9 4 31661 55080 0,5748
50 14 3 20 0,9 4 51113 87465 0,5844
50 16 3 20 0,9 4 79326 130560 0,6076
50 18 3 20 0,9 4 114978 185895 0,6185
50 20 3 20 0,9 4 159948 255000 0,6272