Page 419 - Wind Energy Handbook

BLADES 393

Calculated Maximum out- of-plane bending 12 m radius (kNm) 130 118 115 108 90 108 88

and moment at
Speed azimuth for bending moment 258 158 908 908 908 158 908

Rated Critical blade maximum

m/s axis
16
with Machine Maximum inclination of flow to shaft 308 46.88 138 138 138 49.58 138
WTG

Diameter Stall-regulated Maximum shaft tilt with respect to flow 138 138 138 138 138 138 138

m for
40
IIA Wind direction change ¼ yaw error – – – 47.8 –
Class Dynamics, 278 458

for
Cases Ignoring speed (m/s) Max 40.4 31 36.6 40.5 25 25 31

Load Radius wind Gust 15 11.6 15.5 – – 15

Production m 12 at Hub-height Initial 16 25 25 25 25 16

Power Moments

for Bending extreme direction change
Conditions Description Normal turbulence model (Normal turbulence model Extreme coherent gust with direction change fault considered) Grid loss with 1 year extreme extreme operating gust Extreme coherent gust

Wind Out-of-plane extreme – fatigue) – Electrical (not operating gust year Extreme wind shear year

7.3 Maximum 50 50
Table Load case 1.1 (1.2) 1.3 1.4 1.5 1.6 1.7 1.8 1.9