Typical windstrength for wind turbine operation
Minimum working wind needed ..8mph
Optimum is 30 mph
Max is 50 mph, at which they are feathered / shut down.
As wind energy increases to speed off its movement squared.( ie double wind, you can create 4 x energy, its easy to see at 8mph they are only just providing electricity..)
Worthwhile production kicks in at 13 mph. ( that's about wind needed for a windsurfer to plane, and for yachts/ dinghies to be fun)
No where in UK has an average wind speed over 13mph. ( median) The mean average is distorted by the days when the things have to be shut down. ( 50 mph on Monday and 10 rest of week , will give a good average wind but turbine would not have been producing all week)
When you next drive past a wind farm,check wind and see if they are rotating,chances are in UK they will not be)
Look up some average wind speeds for around uk..I,ve spent last 35 years searching for wind.
The mis information is from the advocates, looking for grants to build them...
In years to come they will be another symbol of how people can be misled, along with Hybrid cars.
The only people benefitting from them are farmers whose land they are built on and Siemens..supplying them.
Imagine having to rely on one in your garden , you could only boil kettle on 13 mph plus days.
Any sailor will tell you, wind in UK is like a fickle old man. Might not turn up when expected, gets up late and goes to bed early, but occasionally turns up full of energy.
Planning our energy requirements around it is ludicrous.
.. sorry Zatlan, but this is a topic you obviously are not well versed in.
Engineers would tend to use metres per second as the measure of wind speed.
The power of the wind increases by the cube of the wind speed
The wind resource is significantly higher at 100 m above sea level than at the levels you sail at.
Engineers will do site surveys by taking wind speed measurements over a year or more before calculating the appropriate annualised energy yield. And these will produce accurate figures and provide pointers for the optimal aerofoil blade sections.
Wind power, unlike solar is a technology which scales well, .. a solar area of twice the area captures twice the energy. IN wind it captures 4 times . in wind big is better...and a better use of materials
The comments about unreliability in turbines with gearboxes failing etc.. yes this happens, Earlier machines used inappropriate gearboxes, probably designed for locomotives, and not suited to the transient fluctuations in power. ..
but there is a trend, particularly for the offshore 3 to 5 megawatt peak power units, to go for gearbox free units ... Just like a very very large direct drive hub motor , and use electronics to condition the output voltage.
Your comment about wind and sailing is interesting, but I doubt that the sailors who have used it for some 3000 years would agree with your fair weather sailing analysis.
Almost every dire prediction about wind has been proven wrong.. that it would destabilise the grid, that it could not compete with fossil fuel burning, that it could not sustain a national baseload..