BOTTOM LINE. YOUR INCOME!
Wind, site evaluation and operating income.
The theoretical power that the wind contains, depends on the wind speed, air density and the area over which it flows. Objects and their wind shadows have an enormous negative effect on wind speed and lead to considerably less power in the wind. At higher altitudes, for example on high-rise rooftops, there is far less turbulence. The actual performance, i.e. “what comes out at the end" depends on the following additional factors:
- The cp value (efficiency) of the plant.
- The mechanical loss (drag).
- The electromechanical loss (resistance).
The cp value refers to the efficiency of the wind turbine or the proportion of the wind, which can implement the system into mechanical energy. Depending on the location and or the wind shadows, the developed helix rotor has a cp value from 0.21 to 0.28. Still to deduct is the mechanical loss due to the power transmission and electrical loss during the electricity transmission and transformation into usable energy.
For Example:
On balance, 28% of the theoretical wind power remains for actual use. At 1080 watts of wind power at 12 m / s wind speed, with a rotor surface of 1 m², 280 watts of usable electricity are created.
Put simply, the higher the plant is positioned and the more obstacles that are removed, the easier it is for the wind to access the turbine and the greater the yield.
Sample income statement
Location Sardinien |
Location Hannover |
||
Period |
Produced |
Period |
Produced |
Day moving average |
13,60 kWh |
Day moving average |
7,55 kWh |
Month |
408,3 kWh |
Month |
226,67 kWh |
Annual average |
4900 kWh |
Annual average |
2720 kWh |
Average |
5 m/s |
Average |
4 m/s |
|
|
||
Location Husum |
Location Rosenheim |
||
Period |
Produced |
Period |
Produced |
Day moving average |
26,87 kWh |
Day moving average |
4,67 kWh |
Month |
817,29 kWh |
Month |
140 kWh |
Annual average |
9807,55 kWh |
Annual average |
1680 kWh |
Average |
7,3 m/s |
Average |
4 m/s |
Income Calculations and Savings in Numbers.
How can you save money with the Helix Wind Turbine WIND OF CHANGE? On the basis of two examples, we have illustrated the savings potential.
Wind speed |
Hours |
Power |
Current Price |
TAX |
VAT |
Savings |
4 m/s |
2600 h |
1680 kWh |
23 ct/kWh |
|
|
386,40 Euro |
|
|
|
|
3,53 Ct/kWh |
|
59,30 Euro |
|
|
|
|
|
19 % |
84,68 Euro |
|
|
|
|
|
|
530,38 Euro |
Wind speed |
Hours |
Power |
Current Price |
TAX |
VAT |
Savings |
6 m/s |
2600 h |
3.300 kwh |
23 ct/kwh |
|
|
759,00 Euro |
|
|
|
|
3,53 Ct/kwh |
|
116,49 Euro |
|
|
|
|
|
19 % |
166,34 Euro |
|
|
|
|
|
|
1.041,83 Euro |
Using the following formula you can easily calculate your personal savings potential. The following data is required:
- Average wind speed at your location¹
- Electricity price per kWh of your service provider. (See last invoice).
- Electricity Tax and VAT (see last invoice).
Calculation of potential savings using the following formula:
- Wind speed x hours x (electricity price + tax)!
Payback and break-even point.
By using just the constant, average annual wind speed of your location, the following payback results:
m/s |
Average Wind hours |
Watt |
Result Wh |
Result kWh |
Current Price |
Result |
ROI in years |
|
|
|
|
|
|
|
8.100 € |
1 |
2780 |
100 |
278000 |
278 |
0,275 € |
76,45 € |
108,96 |
2 |
2780 |
200 |
556000 |
556 |
0,275 € |
152,90 € |
54,48 |
3 |
2780 |
350 |
973000 |
973 |
0,275 € |
267,58 € |
31,13 |
4 |
2780 |
450 |
1251000 |
1251 |
0,275 € |
344,03 € |
24,21 |
5 |
2780 |
650 |
1807000 |
1807 |
0,275 € |
496,93 € |
16,76 |
6 |
2780 |
850 |
2363000 |
2363 |
0,275 € |
649,83 € |
12,82 |
7 |
2780 |
1050 |
2919000 |
2919 |
0,275 € |
802,73 € |
10,38 |
8 |
2780 |
1300 |
3614000 |
3614 |
0,275 € |
993,85 € |
8,38 |
9 |
2780 |
1375 |
3822500 |
3823 |
0,275 € |
1.051,19 € |
7,92 |
10 |
2780 |
1425 |
3961500 |
3962 |
0,275 € |
1.089,41 € |
7,65 |
Average wind speeds.
As a constant wind speed never prevails, it is necessary to look at a cross section of wind speeds. The following calculation is based on data from the German Weather Service:
m/s |
Wind hours total |
Watt |
Result Wh |
Result kWh |
Current Price |
Result |
|
0 - 0,03 |
67 |
0 |
0 |
0 |
0,275 € |
0,00 € |
|
1,6 |
606 |
100 |
60600 |
61 |
0,275 € |
16,67 € |
|
3,4 |
1988 |
350 |
695800 |
696 |
0,275 € |
191,35 € |
|
5,5 |
2706 |
450 |
1217700 |
1218 |
0,275 € |
334,87 € |
|
8 |
2217 |
650 |
1441050 |
1441 |
0,275 € |
396,29 € |
|
10,8 |
951 |
850 |
808350 |
808 |
0,275 € |
222,30 € |
|
13,9 |
205 |
1050 |
215250 |
215 |
0,275 € |
59,19 € |
|
17,2 |
20 |
1300 |
26000 |
26 |
0,275 € |
7,15 € |
|
20,8 |
4 |
1375 |
5500 |
6 |
0,275 € |
1,51 € |
|
|
|
|
|
|
Final Results |
1.229,32 € |
|
|
|
|
|
|
ROI at 8.400 € |
6,78 |
Years on average |