Because it’s clean and renewable, wind is one of our best energy sources.
“Windmill” describes any bladed structure that generates power from wind, but there’s a big difference between windmills and turbines.
Windmills harness wind for mechanical tasks, such as pumping water, operating a saw, or grinding grain. A windmill uses mechanical action, not electricity, to perform a specific job at a specific location. But a wind turbine generates electricity that’s sent elsewhere.
Windmills were in use as early as the 9th century in Persia. By the 1600s, windmills dotted the landscape across the Middle East and Europe, most famously in Holland. From there, through trade and colonization, windmills spread around the world.
In the United States and Australia, windmills were crucial to the development of agriculture. They were vital through the 1800s and into the 1930s, when windmills were replaced by electric motors and appliances.
Unlike windmills, wind turbines produce electricity through camshafts that rotate at high speed. As the blades turn, a wire is moved across a magnetic field to produce electric current. Turbines are larger than windmills, with higher towers and longer blades. Giant turbines in wind farms have up to 300-foot blades, with even longer blades (as long as 700 ft.) on the newest ones.
Wind turbines are generally three-bladed, usually white, and sit atop a single pole. Dozens or even hundreds of wind turbines form wind farms.
The first power plant using wind turbines opened in 1895 in Denmark, with more than 2,500 wind turbines installed over the next five years.
By 1900, however, wind proponents had lost out to gas and coal companies and during the 20th century, almost all power plants were fueled by polluting, non-renewable fuels.
The situation is improving, though.
For example, approximately 50% of Maryland’s power now comes from clean (non-carbon-producing) sources, and the state has ambitious goals. (See our recent Common Sense article on solar power.) Wind-generated electricity accounts for only 1.3% of all Maryland power but planned projects will increase this percentage.
The U.S. Wind Turbine Database assembles data on 73,352 turbines in 43 states, plus Guam and Puerto Rico. The most recent turbines became operational just this year, while the oldest were installed before 1990. Collectively, these turbines have a capacity of almost 145,000 megawatts of electricity.
Most wind farms are on land, but over the past few decades, the industry has moved to offshore installations. Winds are stronger at sea and can generate more electricity more efficiently. Offshore turbines are larger and stronger to survive storms, thus more expensive.
Last year was a tough year for the wind farm industry, and it is not clear how things will shake out. Ørsted, a Danish company with contracts for the majority of the offshore wind farms in the U.S., has recently canceled two projects off the New Jersey coast.
Several other Ørsted contracts are being reconsidered. Costs and delays rose significantly during 2023, due to supply chain issues, inflation, interest rates, and political unrest.
There are four wind farms along the Atlantic coast off Rhode Island, Virginia, New York, and Massachusetts.
Maryland has four offshore wind power projects under contract. None are under construction yet, and Ørsted has moved completion dates to 2026 or later. 146 turbines are expected to generate 12,000 full-time-equivalent jobs and 2,022.5 megawatts of power, and to supply power for nearly 600,000 homes on the Eastern Shore and elsewhere in Maryland.
These wind farms would also generate jobs in related areas. In August 2022, through the American Rescue Plan, Maryland was awarded a $23 million grant to establish a training center to create an offshore wind turbine workforce. Called Maryland Works for Wind, the grant will provide funds for training, fabrication, and employment. The project will be guided by Ørsted.
Turbines will be built initially in Baltimore. Operational, maintenance, and construction jobs will be created in Federalsburg, West Ocean City, and Salisbury.
The Eastern Shore will host a training program for apprentices and interns to learn how to maintain turbines.
While most welcome the prospect of cleaner, renewable wind power and new jobs, there are local officials, business owners, and residents in and near Ocean City who worry about damaging their tourism industry. Although the turbines would be 12 to 25 miles out to sea, on clear days the tops of the turbines would be visible and might be considered unaesthetic.
Ocean City officials point out that even small turbines are taller than a cruise ship, while medium-size turbines are taller than the Statue of Liberty. The tallest (over 800 ft.) would be higher than the Washington monument. In response, the developer agreed to move the turbines further offshore. They also agreed to reduce the number of turbines.
After a century-long downturn in its use, wind power may be coming back to Maryland and the U.S. Maryland has ambitious plans, but they depend on the outcome of the turbulent issues now affecting the wind turbine industry.
Sources and more information:
“Amid offshore wind industry struggles in the US, how will Ocean City projects fare?” Christine Condon, Nov. 17, 2023, Baltimore Sun
“List of offshore wind farms in the United States,” Wikipedia
https://en.wikipedia.org/wiki/List_of_offshore_wind_farms_in_the_United_States
“New York Turns On Its First Offshore Wind Farm,” Patrick McGeehan, Dec. 6, 2023, New York Times
https://www.nytimes.com/2023/12/06/nyregion/ny-wind-farm-long-island.html
“OC supports green & unseen wind farms,” Town of Ocean City, Md.
https://oceancitymd.gov/oc/oc-supports-green-unseen-wind-farms/
“Offshore wind in the U.S. hit headwinds in 2023. Here's what you need to know,” Miriam Wasser, Dec. 27, 2023, NPR
Off-Shore Wind Projects in Maryland
https://offshorewindmaryland.org/offshore-wind-projects-in-md/
“Vineyard Wind, country’s first large-scale offshore wind project, is producing clean electricity,” Miriam Wasser, Jan. 3, 2024, WBUR.org
https://www.wbur.org/news/2024/01/03/vineyard-offshore-wind-massachusetts-first-power-clean-energy
Wind Energy in Maryland, WindExchange, Office of Energy Efficiency & Renewable Energy
https://windexchange.energy.gov/states/md
“Wind Industry Jobs on the Way to Maryland’s Eastern Shore,” Aug. 5, 2022, WBOC.com
Windmills for Sale in Montana, Big Sky Windmills
Windmills for Sale, Rockridge Windmills, California
https://www.rockridgewindmills.com/windmills-for-sale/
“Wind turbines 11.9 miles off the coast of Ocean City,” Jack Fietchner, July 17, 2023, WMDT.com
https://www.wmdt.com/2023/07/wind-turbines-11-9-miles-off-the-coast-of-ocean-city/
Jane Jewell is a writer, editor, photographer, and teacher. She has worked in news, publishing, and as the director of a national writer's group. She lives in Chestertown with her husband Peter Heck, a ginger cat named Riley, and a lot of books.
Title image: Pond at Pickering Creek Audubon Center, Talbot Co. Photo: Jan Plotczyk