worthy of note is this blasting of prof hughes
Nuclear and coal are often cited as always available
For example DRAX in uk is mentioned in bishops hill
But figures for recent availability (excludes time not required and not producing) come out at approx. 80%
Some plots using data from REFs own database
|Each Turbine with approx 10 years record load factor plotted against year|
|A linear curve fit to Turbines output gives change in load factor per year|
Note that the first graph shows all turbines load factor reducing until 2011 when a large recovery occurs. Is part of the loss caused by a reducing wind speed profile which then improves in 2011?
The second plot does show a general loss in efficiency over 10 years but nearer 7% total not the 15% suggested by Hughes document.
The REF site admits that 2010 was a low wind year:
"Overall, it is clear that the load factor for 2010 was low in comparison with preceding years, indicating that winds in this year, and particularly in the winter 2009-2010, were themselves relatively low."
There are 2 plots on the REF site:
|Note offset zero! If you ignore 2010 (low wind) the load factor looks pretty flat for the remaining 6 years|
|Offshore and onshore data combined?|
Diseases/disturbances reported by opponents:
Well worth a read if you are looking for reasons to oppose the construction!