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SMALL WIND TURBINES

ASSESSMENT OF WIND POTENTIAL

A location is suitable for a small wind turbine when the average wind speed exceeds 3m/s.

For a first estimation the following table can give significant hints. If the local wind moves leaves and thin twigs most of the time, then you will have good wind conditions for a small wind turbine at  your location.

 

Beaufort m/s Overland At Sea

0
calm

0 to 0,2

Smoke rises vertically

Mirror-smooth lake

1
lighter
train

0,3 to 1,5

Wind direction recognizable only by smoke

Scaly ripples

2
slight

1,6 to 3,3

Audible murmur, wind in your face music

Short small waves, crests not breaking

3
faint
breeze

3,4 to 5,4

Leaves and branches move

Combs begin to break down, usually foam glassy

4
moderate
breeze

5,5 to 8,9

Moves twigs and branches, raises dust

Even small waves, but in many cases foam combs

5
fresh
breeze

9 to 11

Small trees begin to sway

Moderately long waves with foam crests

6
strong wind

11 to 13,9

Difficult to use pipes to wire lines, screens

Formation of large waves begins anywhere, whitecaps

7
stiffer
wind

14 to 17

Grip difficult when walking

Sea heaps up, foam strips downwind

8
stormy
Wind

17,1 to 20,8

Breaks branches from the trees, to walk considerably more difficult

High waves,summit begins to blow away

9
storm

20,9 to 24,4

Small damage to homes and roofs

Summit gone with dense foam strips, rolls the lake, spray

10
severe storm

24,5 to 28,4

Inland rare trees uprooted, considerable damage

Very high waves, sea white with foam

11
gale-force
storm

29 to 33

Very rare inland, widespread storm damage

Exceptionally high waves, visibility severely hindered by spray

12
hurricane

over 33

Extreme storm damage

Air filled with foam and spray, sea completely white

 

Reliable data about the local wind potential means a record of several years at the location. We will support you with consulting and planning and during project realisation.

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