Eiffel Tower now has its own wind turbines. [PHOTOS]

The Eiffel Tower Now Has Its Very Own Wind Turbines

The Eiffel Tower Now Has Its Very Own Wind Turbines

Future Tense
The Citizen's Guide to the Future
Feb. 24 2015 5:21 PM

The Eiffel Tower Now Has Its Very Own Wind Turbines

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At 400 feet above ground level, installing the Eiffel Tower's new wind turbines was a tricky endeavor.

Photo courtesy UGE

As part of its “first major face-lift in 30 years,” the Eiffel Tower has a new set of wind turbines.

Earlier this year, the New York City–based renewable-energy design firm UGE installed the turbines, which are now spinning above the tower’s second level, 400 feet above ground level.

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The installation of the turbines was tricky. Each of the two custom-built blades had to be perilously lifted in place by rope. I spoke with UGE’s Jan Gromadzki, who managed the installation from mid-January to early February.

“Being up there so high, we had crazy weather, we had rain, wind and snow while we were doing the installation,” Gromadzki told me. “Just being there on that landmark, watching tourists take photos of you, was a bit unconventional.”

The wind turbines aren’t big. They’re designed to produce about 10,000 kWh of electricity each year, enough to offset the tower’s electricity use in commercial areas—equivalent to the annual average use of a single U.S. home. In addition to the wind turbines, the tower’s environmentally friendly retrofit includes LED lighting and a rainwater recovery system that pipes water directly to toilets on site.

“It’s just two wind turbines. It’s definitely high-profile, but it’s not the biggest project we’ve done in terms of energy generation,” Gromadzki said.

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Gromadzki noted that the Eiffel Tower is already 100 percent powered by renewable energy, which is produced off site as a part of a citywide goal to reduce greenhouse gas emissions 25 percent by 2020 and 75 percent by 2050. So, the new wind turbines are more a publicly visible manifestation of that goal, rather than a meaningful step toward achieving it.

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A worker installing a new wind turbineis suspended by a series of cables within the Eiffel Tower.

Photo courtesy UGE

With a helical shape rather than the more well-known stick-and-pinwheel design, the turbines are also very visually striking, yet specially painted to blend in to the tower’s aesthetic. Gromadzki says the nontraditional design means that the turbines are virtually silent and don’t produce any vibrations.

“I didn’t think we’d be able to seem them that well,” said Gromadzki. “When they’re spinning, it’s pretty much all you can see because they’re the only moving parts on the tower, except for the elevators.”

For architectural purists wondering how such a 21st-century addition to a World Heritage Site could pass muster, the Eiffel Tower has long been at the forefront of the technology of the day. It has functioned as a broadcast tower for more than 100 years—in 1903, Gustave Eiffel saved it from a planned demolition by turning it into a long-range radio antenna.

The energy retrofit on the iconic Paris landmark comes as the city prepares to host a major U.N. summit on climate change later this year, which is expected to culminate in the world’s first comprehensive agreement on climate change action.

“The project happened because the mayor’s office wanted it to happen. They really wanted to make a strong statement about renewable energy,” Gromadzki said. He added that the turbines were commissioned by the city in part to “show the world we’re moving in this direction.”

Asked by email what’s next for their design firm, UGE spokesperson Robin Carol said, “We have upcoming solar projects with Dropbox and Bayer which may be worth mentioning. Not the Arc d'Triomphe...yet :)”

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Eric Holthaus is a meteorologist who writes about weather and climate for Slate’s Future Tense. Follow him on Twitter.