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9.0 Wind Turbine Operation
NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer
on page v of this document.
DOC012R02 AOC 15/50 User Manual Nov 2001
83
The example below illustrates the above formula:
If a 50 kW wind turbine generates 50 kW at 13.4 m/s (30 mph) wind speed under
standard conditions, what would the output be at an altitude of 1,980 m (6,500 feet) and
30°C (86°F)?
Solution:
Corrected Output = Standard Output *C
t
*C
a
P
s
= 50 kW
1
6
19
.95 =
460
+
8
5
=
C
t
.799 =
966
. =
C
6500/1000
a
Corrected Output = (50kW) (.951) (.799) = 38.0 kW
This approach can also be used, albeit with less accuracy, to correct annual energy (kWh) output
predictions.
9.4.5 Acoustics
The AOC 15/50 has been designed as a low-noise wind turbine. The most significant sources of
noise are the drive train and the turbulence caused by the blades as they pass the tower. An
audible increase in noise may indicate a problem and appropriate measures to diagnose it should
be taken immediately, to prevent damage to the wind turbine. Please note the sounds associated
with a normally operating wind turbine when the machine is first installed; these will provide an
acoustic baseline for future comparisons.