From the inbox: large-scale wind energy in Kentucky?
Monday, January 14, 2013
If you’ve ever driven west from Kentucky, you know the drive can be pretty flat at times. With family in Iowa, I make the drive about once a year. A common joke from my in-laws is that it’s so flat you can watch your dog run away for three days.
Driving through the Midwest and Great Plains, you’ll encounter stretches of road where wind turbines dot the country-side. And there’s a good reason for it: the geography is such that winds in portions of these areas are much stronger than average.
That means the “fuel” for these wind turbines is available more often and in steadier supply than in places like Kentucky, which Mother Nature ranked low on the wind potential scale.
Having a secure and reliable supply of fuel is essential for utility companies like ours, which must generate and deliver energy as their customers demand it.
And in Kentucky, we’re mandated to serve our customers at the lowest reasonable cost. A poor availability of steady and strong winds in our state means that relying on wind to create energy on a larger size and scale – particularly on the hottest days of summer and coldest days of winter – would be an expensive endeavor, and one that would require a lot of land.
Largest wind farm in Kansas begins operation
Check out this story from the Kansas City Star about a wind farm in the state that began commercial operation this year. In order to generate 438 megawatts, more than 274 wind turbines were built on a 66,000-acre plot of land.
Since we’re often asked about the possibility of wind power to meet customers’ energy demands in Kentucky, I did a little more research on the amount of land it would take in order to match the stated generation output of the wind farm in Kansas.
Because the wind doesn’t always blow in our area (wind typically generates only about 10 percent of its rated capacity at the time of summer peak), we would need 10 times the scale of Kansas’ latest wind farm to actually get 438 megawatts during times of peak energy use.
Not all wind is created equal
How large is 66,000 acres (the size of Kansas’ latest wind farm)? More than 103 square miles.
To put this in perspective, Louisville, Ky., is nearly 400 square miles and Lexington, Ky., is about 285 square miles.
Knowing that 10 times the scale of the 438-megawatt wind farm in Kansas would need to be built in Kentucky to match the generation output, we would need at least 1,030 square miles of land (659,200 acres) to complete a similar project here in the Bluegrass state.
That’s more than 2.5 times the size of Louisville and more than 3.5 times the size of Lexington.
Truth in Advertising
Wind farms seldom produce energy equal to what is promised, and even the turbines in windier places like Kansas and the Great Plains states regularly produce only a fraction of their rated capacity.
If only 10 percent of your investment is available when it’s needed most (think peak energy demand days in the summer or winter), a utility company either has to have 10 times the rated capacity or supplement the short-fall with more reliable back-up generation which adds to the cost.
While wind turbines will continue to become more efficient, technological advancements can’t capture wind that doesn’t blow.
Think of it another way: if your car is rated to provide 30 miles per gallon but can only do so on rare occasions and usually only delivers 3 miles per gallon, you’d have some real problems.
At LG&E and KU, we must meet our customers’ energy needs 24/7, and that requires us to respond real-time to any changes in demand.
Wind energy can play a role in meeting the nation’s energy needs, but its low availability, particularly on hot summer days, and the relatively high cost of wind turbines means it’s not a good source for reliable, low-cost generation that we are obligated to supply in Kentucky.
We’ll explore more environmental topics in future blog entries. If there’s anything you’d like us to discuss, leave us a comment and we’ll add it to the list.
Until next time, keep using energy wisely.
Driving through the Midwest and Great Plains, you’ll encounter stretches of road where wind turbines dot the country-side. And there’s a good reason for it: the geography is such that winds in portions of these areas are much stronger than average.
That means the “fuel” for these wind turbines is available more often and in steadier supply than in places like Kentucky, which Mother Nature ranked low on the wind potential scale.
Having a secure and reliable supply of fuel is essential for utility companies like ours, which must generate and deliver energy as their customers demand it.
And in Kentucky, we’re mandated to serve our customers at the lowest reasonable cost. A poor availability of steady and strong winds in our state means that relying on wind to create energy on a larger size and scale – particularly on the hottest days of summer and coldest days of winter – would be an expensive endeavor, and one that would require a lot of land.
Largest wind farm in Kansas begins operation
Check out this story from the Kansas City Star about a wind farm in the state that began commercial operation this year. In order to generate 438 megawatts, more than 274 wind turbines were built on a 66,000-acre plot of land.
Since we’re often asked about the possibility of wind power to meet customers’ energy demands in Kentucky, I did a little more research on the amount of land it would take in order to match the stated generation output of the wind farm in Kansas.
Because the wind doesn’t always blow in our area (wind typically generates only about 10 percent of its rated capacity at the time of summer peak), we would need 10 times the scale of Kansas’ latest wind farm to actually get 438 megawatts during times of peak energy use.
Not all wind is created equal
How large is 66,000 acres (the size of Kansas’ latest wind farm)? More than 103 square miles.
To put this in perspective, Louisville, Ky., is nearly 400 square miles and Lexington, Ky., is about 285 square miles.
Knowing that 10 times the scale of the 438-megawatt wind farm in Kansas would need to be built in Kentucky to match the generation output, we would need at least 1,030 square miles of land (659,200 acres) to complete a similar project here in the Bluegrass state.
That’s more than 2.5 times the size of Louisville and more than 3.5 times the size of Lexington.
Truth in Advertising
Wind farms seldom produce energy equal to what is promised, and even the turbines in windier places like Kansas and the Great Plains states regularly produce only a fraction of their rated capacity.
If only 10 percent of your investment is available when it’s needed most (think peak energy demand days in the summer or winter), a utility company either has to have 10 times the rated capacity or supplement the short-fall with more reliable back-up generation which adds to the cost.
While wind turbines will continue to become more efficient, technological advancements can’t capture wind that doesn’t blow.
Think of it another way: if your car is rated to provide 30 miles per gallon but can only do so on rare occasions and usually only delivers 3 miles per gallon, you’d have some real problems.
At LG&E and KU, we must meet our customers’ energy needs 24/7, and that requires us to respond real-time to any changes in demand.
Wind energy can play a role in meeting the nation’s energy needs, but its low availability, particularly on hot summer days, and the relatively high cost of wind turbines means it’s not a good source for reliable, low-cost generation that we are obligated to supply in Kentucky.
We’ll explore more environmental topics in future blog entries. If there’s anything you’d like us to discuss, leave us a comment and we’ll add it to the list.
Until next time, keep using energy wisely.
