The wind speed has to be pretty high, Dave, to put it out of action. Our local
turbine should be up a very large proportion of the time: i.e. the wind is high
enough to turn it but not so high that the blades have to be feathered (or
furled). That up-time was part of the cost-benefit analysis undertaken by the
organisation making it happen.
I watched some large turbines the other day in gusts of up to 35kts and they
were very well controlled. Gusts above that are pretty rare and they wouldn’t
place them in windy places if high winds might be a threat. The large offshore
wind farms are a very sizeable investment.
Chris
On 23 Mar 2014, at 18:43, deebel <deebel@xxxxxxxxx> wrote:
> I've also heard that over a certain windspeed that it is unsafe for the
> turbines to operate which seems rather ironic
>
> Dave
>
> On 23/03/2014 18:13, Chris Barker wrote:
>> Another snag with wind power is that it is too easy to switch off. Surplus
>> power is switched off in the UK, so that will give a false picture of the
>> proportion of power produced by wind (or other renewables).
>>
>> It also means that the power companies are paying for energy that they can't
>> use.
>>
>> Chris
>>
>> On 23 Mar 14, at 16:46, Ken Norton <ken@xxxxxxxxxxx> wrote:
>>
>>> Chuck wrote:
>>>> According to the DOE, Iowa wind farms produced 27.4% of the state's
>>>> electrical capacity in 2013... a far cry from being able to supply half
>>>> the country. Unlike the UK which fails to meet the claimed 33%
>>>> production from installed capacity, Iowa very slightly exceeds it. When
>>>> you figure out how to get rid of all the backup conventional generating
>>>> capacity you'll have something. Meantime you've just managed to
>>>> increase the cost and (some would say) blight the land.
>>> The DOE estimate is slightly misleading for several reasons. First of
>>> all, several major wind farms came online in 2013. We're building them
>>> as fast as we can. Secondly, Iowa is an energy exporter. A substantial
>>> amount of our wind energy is exported to other states. Thirdly, we've
>>> been able to replace mainline coal-fired plants with gas-fired boost
>>> plants.
>
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