When TSR (Tip Speed Ratio) is at speed ratio
at the end of the rotor relative to the wind speed, which consists of three types of rotor blades is equal to 5 times the wind speed
D is the diameter of the rotor (m) is calculated by multiplying the circumference is 22/7
.An example of the calculation of no-load speed of three types of rotor blades. 15-meter diameter at wind speed of 8 meters per second speed 8 X
= 5 X 7/X 60 (15 X 22) the 16800 =
= 330/50.90 RPM.
Note from this calculation formula. If the wind speed is decreased. No-load speed will be reduced to the same ratio as the wind speed dropped from 8.6 meters per second. No-load speed will decrease from 50.90 the rest 38.175 RPM , In which case the replacement cycle, increased to 1500 rpm may require a gear ratio 1: 40
.
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