Wind Turbines might well be visually non-aesthetic and cause discomfort to those living nearby, however the greatest reason they should not be built is because they do not work! The information presented below is taken from NEM (National Electricity Market) web site a government body overseeing the Eastern Australia energy system and a very interesting article 'Wind Farms in Eastern Australia – Recent Lessons' by Paul Miskelly (2012).
When the 'Environmentalists' first pushed for the development of renewable energy, mainly in the form of Wind Farms, no one considered what the farms could do. Germany had started their 'Energiewende' program and the world was abuzz with the development of renewable energy. No one considered the limitations of an extremely intermittent and variable energy system. In the NEM website if one google searches www.energyanero.id.au, daily, and yearly wind energy graphs can be obtained on the wind output of various Wind Farms. Paul Miskelly (2012) had the following graph in his article.
This clearly shows the immense variation in output of a particular Wind Farm, this one being the Capital Wind Farm NSW. The Wind Farm proponents then said, but if we spread Wind Farms and took the electricity generated throughout the NEM constituency this variable and intermittent output will stabilise. NEM have produced the following graphs:
The top red line shows demand, and obviously Eastern Australia had a heat wave late January. The bottom blue line is NEM Wind Farm Performance. It shows on the left hand side the percentage of all output. The black line is the 14 day moving average (a spurious and meaningless number). Maximum output is nearly 80% in late June. The crucial part is the number of times the line goes below 10% when the renewable wind farm output needs to be totally supported by other generating systems.
The above graph illustrates this negligible output, where it can be seen extended periods of -10% are noted – First to Eighth May 2011 and later in the month from Twenty-eighth to Thirtieth of May 2011. These are not isolated occurrences, but happen all the time. It is crazy that the Greens-Labor Parties should be pursuing this electrical generation system.
To illustrate this even further, proponents are now proposing that battery backup (a new support system) as yet un-costed is needed to 'take out the peaks and lows' of wind generation. An Australian Company Redflow (RDF) listed on the Australian stock exchange has one of the most robust and developed large scale batteries in the world. However even their batteries would be hard pressed to back up the following situation:
This graph from NEM is the total output of Wind Farms in Eastern Australia on the 21st July 2014 and clearly shows between 2 pm and 6pm negligible wind energy production. Looking at the graph after 6pm only one or two farms were producing 'significant' at around 40% of their rated capacity. This shows a significant period when wind energy needed almost 100% backup. So what happened the next day 22nd July 2014:
Discuss in our Forums
See what other readers are saying about this article!
Click here to read & post comments.
15 posts so far.