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Cold Autumn Delays Installation of Noise Dampers on NextEra Wind Turbines; Mercer Uses Hyperlinks Well

I want to compliment Bob Mercer on fully adopting Internet journalism. His December 20 report on Crowned Ridge Wind’s interesting urgent request to the Public Utilities Commission for a waiver of operating conditions demonstrates perfectly how to integrate hyperlinks into good reporting.

One design for LNTE attachments for wind-turbine blades
Illustration of a serrated type of low-noise trailing-edge attachment for wind turbine blades, from Tze Pei Chong and Elisa Dubois, “Optimization of the Poro-Serrated Trailing Edges for Airfoil Broadband Noise Reduction,” Journal of the Acoustical Society of America, 2019.08.29.

Crowned Ridge Wind (a tongue-snarling name not fit for broadcast) is in trouble. NextEra Energy Resources got permission from the PUC back in July to build up to a 130-turbine, 300-megawatt wind farm across 83 square miles of Grant and Codington counties. To fulfill the noise provisions among the 45 conditions on its permit, NextEra agreed to install “low-noise trailing edge” attachments—LNTE—on their turbine blades to ensure neighbors wouldn’t hear any noise from the turbines greater than 45 decibels (a little louder than their fridges but quieter than most offices and gentle conversations).

NextEra’s chief engineer on the project, Joshua Tran, says the blade surface and air temperature need to be 50°F during installation and the blade temp needs to be 6°F higher than the dew point. That’s not just because engineer Tran is from Palm Beach, Florida; it’s because the glue may not hold!

Alas, our wet, chilly autumn was hard on corn and wind farmers alike: NextEra only managed to attach LNTEs to eight of its 87 turbines before the blades got too cold. As Bob Mercer reports, if NextEra doesn’t have Crowned Ridge up and running by January 1, it will have to pay Xcel Energy a penalty of $75,000 per day. (Ouch: that’s four speeches they won’t be able to afford from Kristi Noem’s motivational speaker!) NextEra thus is asking the PUC to temporarily waive the LNTE requirement until summer 2020. To protect neighbors from blade noise, NextEra is promising to shut down six of the turbines whenever the wind blows harder than 20 miles per hour.

NextEra asked for this waiver on December 13, a week before the PUC’s regular December 20 meeting. Opponents of the wind farm said NextEra has to give at least ten days notice of a request for a change like this. The PUC obliged both parties by calling an ad hoc meeting for December 30:

Commission chairman Gary Hanson proposed waiting until the next scheduled meeting. That’s on January 7.

“I do believe this falls under the ‘We do not know what we do not know,”‘ Hanson said.

Vice chairman Chris Nelson told the company’s officials and lawyers in the meeting room they should have asked for the waiver two months ago. He told the interveners on the phone they needed to produce meaningful information rather than using the time as a delaying tactic.

Nelson suggested the meeting should be December 30 or 31.

…Hanson said he would “hold tight” on January 7 for the meeting. But he lost, as Nelson and Fiegen voted for December 30 or 31.

“This places an unnecessary burden on intervenors’ rights,” Hanson said.

Nelson responded that the intervenors were getting the 10 days they wanted.

“This is a compromise,” Fiegen said. “I was ready to vote today. At least we’re giving them more time” [Bob Mercer, “Unexpectedly, a S.D. Wind Farm Is in a Tight Spot,” KELO-TV, 2019.12.20].

The PUC’s noise expert (no, not Kristi Noem’s motivational speaker) David Hessler says NextEra can still satisfy the noise-reduction conditions with the temporary waiver plan. NextEra will get a good finger-wagging—Commissioner Nelson is right: NextEra should have called when the snow flew on Gypsy Day—but they’ll likely also get their waiver and can dicker with Xcel to see how their buyer feels about not running turbines on the windier days.

But Bob, Bob, Bob—Bob Mercer veteran reporter turned Internet maven, gets kudos for a well-structured and well-source report. He plops seven hyperlinks snugly into his story, aptly providing readers with sources for the Crowned Ridge Wind docket, the December 13 cover letter and waiver request, engineer Tran’s explanation of the problem, a map of the wind farm and the intervenors’ residences, the intervenors’ complaint about insufficient notice, and the PUC staff’s assessment that the noise levels won’t get out of hand if NextEra follows through and shuts down the LNTE-less turbines on windy days. That’s the great utility of hyperlinks, attaching lots of useful supporting information to an article with minimum disruption of the reading flow.

Mercer’s excellent hyperlinking shows the insufficiency of broadcast television and print for journalism. His 578 words on this technical regulatory topic are already too much for a two-minute spot before weather and sports. A TV spot can’t make those supporting resources available to its audience. And even in his old print milieu, Mercer could never have placed those seven documents immediately in the hands of his readers. Only the Internet and hyperlinks, the greatest invention of the twentieth century, makes possible this kind of rich information-sharing.

The Web is where Bob belongs.Keep those links coming, Bob!

12 Comments

  1. jerry 2019-12-27 10:23

    The sooner we can wean ourselves from dirty oil and fossil fuels in general, the safer we all will be. Would you rather have a little noise or the explosions of munitions over your melon?

    “Beijing (AFP) – China, Russia and Iran will hold joint naval drills starting Friday in the Gulf of Oman, Beijing and Tehran said, at a time of heightened tensions since the US withdrew from a landmark nuclear deal with Tehran.

    Set to take place from December 27 to 30, the military exercises aim to “deepen exchange and cooperation between the navies of the three countries”, Chinese defence ministry spokesman Wu Qian told reporters Thursday.

    Wu said the Chinese navy would deploy its Xining guided missile destroyer — nicknamed the “carrier killer” for its array of anti-ship and land attack cruise missiles — in the drills.” https://news.yahoo.com/china-russia-iran-hold-joint-naval-drills-093455381.html?soc_src=community&soc_trk=tw

    Looks like a giant FU to Chubby and the rest of us.

  2. Robert McTaggart 2019-12-27 10:31

    Let’s see….people use energy, but if you place the energy production close to the people they don’t like it. Then if you place the energy farther away, it may not be in an optimal location, and you lose energy in transmitting it to the people. Then the people have to pay more and they don’t like it.

    O boy #FredFlintstone.

    The noise reduction is an engineering problem….ultimately it can be addressed. It is more of a problem the bigger the turbine blades are, and the bigger turbine blades can capture more energy. Cost of doing business.

    Curtailment certainly stops the noise, but they don’t make money when that happens.

  3. mike from iowa 2019-12-27 12:03

    Isn’t preventing wind turbine noise cancer a biglier problem?

  4. jerry 2019-12-27 12:35

    What about the noise from the forced air furnace? The air conditioner? Fox News? Fried eggs? All of that is noise pollution.

  5. Robert McTaggart 2019-12-27 15:01

    Both the frequency and the volume are of issue. If the furnace is really noisy, you have problems.

    Dog poop and chicken poop are bad enough, but if either a dog or a rooster really get going in the noise department overnight or early in the morning, that doesn’t make for good sleeping.

    Bottom line, if people buy a house, they should be able to sleep in it and live in it.

    If you want to live right next to a wind farm (I mean right next to one), I’m sure you will be able to find somebody who will sell you their house.

  6. Debbo 2019-12-27 15:11

    I don’t find the noise from wind turbines a problem. It’s not loud like most air moving, bladed objects are because the turbines are not moving air. The air is moving them. A 6″ table fan is much louder.

    The ado over wind turbine noise seems way “overblown.” (See what I did there?😉) I wonder how much of it erupts from people who want to stop wind farms by any means necessary.

  7. Robert McTaggart 2019-12-27 15:45

    Ha! I get it, Debbo.

    If the regulations have guidelines for noise at different frequencies, then you have to follow the rules. Somebody’s done a measurement, performed a Fourier analysis, and shows this noise pattern (volume at different frequencies) will bother enough people. I’m not talking cancer, I am talking loss of sleep, etc.

  8. mike from iowa 2019-12-27 16:08

    Bottom line, if people buy a house, they should be able to sleep in it and live in it.

    Even when giant cafos are built nearby? The stink from a swine operation is “louder” than noize from wind turbines. It also helps to be nearly deef w/o hearing aid. And even with it in, the noize is not that bad. The biggest problem with the noize is figuring out which direction it comes from. Stink is easier to track.

  9. Robert McTaggart 2019-12-27 16:52

    Do they build wind turbines next to CAFO’s? If they stress the animals, the operation will lose money, so the answer will be no.

    If there is no problem, they should be found copiously with such operations.

  10. Porter Lansing 2019-12-27 17:13

    Usually, the noise of a wind turbine is negated by the noise of the South Dakota wind, itself. When you live in SD, the noise of the wind becomes a background and your brain learns to ignore it. However, the constant irritant of the background wind noise is a cause of the continually, contrary personality many in SD carry around like a millstone, grinding away at the mind. Move away and discover how the normal silence elsewhere is so soothing.

  11. mike from iowa 2019-12-27 17:37

    I suspect wind turbines and cafos compete for the same/similar higher ground locations and I seriously doubt noize will stress already stressed pork chops.

  12. Richard Schriever 2019-12-28 10:29

    I have a security camera for the rear of my house/yard/alley/parking. It notes when it notices things, like “a sound, talking, movement, a person, and so on. The sound of the wind blowing past the microphone is the most frequently noted thing by far – usually louder to talking, or a door slamming, or a car driving by.

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