Novel Approaches to Wind EnergyPosted: January 18, 2015
I think that some of the most exciting developments in human evolution are in the realm of new and creative approaches to harnessing energy. Certainly, our dependence on fossil fuels – coal and petroleum – has done such damage to the environment of the planet that the sustainability of human life is uncertain. The new Pope Francis has taken the issue to heart saying “An economic system centred on the god of money needs to plunder nature to sustain the frenetic rhythm of consumption that is inherent to it. The system continues unchanged, since what dominates are the dynamics of an economy and a finance that are lacking in ethics.”
However, it may be that human ingenuity will yet come to our rescue.
I love trees !! So this unique approach to harvesting wind energy being developed by NewWind of France is reaching right down deeply into my environmentalist heart. Each tree like structure includes a hundred mini-windmills. I suspect that such trees will pose far less risk to birds than the gargantuan windmills that make up the wind farms.
Due to the light construction of the “leaves,” the Wind Tree generates power at wind speeds as low as 4.4 miles per hour! This translates into sustained operation times (an average of 320 days a year) that are almost double those of standard windmills that need higher wind speeds in order to produce electricity. Total output for the tree is about 3.1 kiloWatts. This is substantially below standard windmills, but they can’t operate on as many days due to higher wind thresholds.
The Wind Tree is made entirely of steel and, according to the manufacturer, it is completely silent while running. Each tree is about 36 feet tall and 26 feet wide, allowing it to reach above low obstacles like buildings and other smaller trees and have uninterrupted access to breezes at that level. They can either be plugged in to the public grid or used to power an individual building or complex.
Each tree costs about $36,500, but the payback will be fast. “Planting” them in “groves” may be the key to making the model work most cost effectively. NewWind is planning a test this March, with several units being installed in Paris.
Harnessing wind power really isn’t a new idea. The first grinding of grain harnessing wind power may have developed in Persia. Evidence of windmills in England dates from the 12th century. Wind was not the first non-human power source applied to the task of grinding corn – it was preceded by both animal power, and in all probability by water power. And of course, the Dutch are famous for employing their own unique style of windmill to pump water.
Our family unexpectedly discovered the Shattuck Windmill Museum and Park while traveling through Oklahoma to share Thanksgiving Dinner with family. This little museum was established in 1994 by a gathering of old windmillers. By January 2013 there were 62 diverse examples of windmills standing in the park with no two exactly alike. Beyond displaying these historic structures the park also shows visitors how homesteaders lived and why the windmill was so important to their survival. The park is located at the junction of US Highway 283 and OK State Highway 15.
Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unevenly heats the surface of the Earth. As hot air rises, cooler air moves in to fill the void. As long as the sun shines, the wind will blow. And as long as the wind blows, people will harness it to power their lives.
Wind is a clean source of renewable energy that produces no air or water pollution. And since the wind is free, operational costs are nearly zero once a turbine is erected. Mass production and technology advances are making turbines cheaper, and many governments offer tax incentives to spur wind-energy development.
Some people think wind turbines are ugly and complain about the noise the machines make. The slowly rotating blades can also kill birds and bats, but not nearly as many as cars, power lines, and high-rise buildings do. The wind is also variable: If it’s not blowing, there’s no electricity generated.
During our travels of the blue highways of the back roads we encountered the biggest wind farm we had ever seen in Texas. It turned out to be a project promoted by T Boone Pickens. He bought 500 turbines from GE to build the farm. But then the recession hit hard in late 2008, the Texas wind farm struggled to get the proper transmission lines permitted, and natural gas started on its downward spiral in price, making clean power less attractive to investors.
I’m not complaining about the incredibly low gas prices we are all experiencing currently in the United States. Some of that is driven by excess supply generated by the fracking boom and I suspect some of this has to do with geopolitics influenced by both the Middle East and Russia but I wonder if humanity is being short-sighted about the long-term costs. A General Accounting Office report noted that “shale oil and gas development poses risks to air quality, generally as the result of (1) engine exhaust from increased truck traffic, (2) emissions from diesel-powered pumps used to power equipment, (3) gas that is flared (burned) or vented (released directly into the atmosphere) for operational reasons, and (4) unintentional emissions of pollutants from faulty equipment or impoundment-temporary storage areas”.
But back to novel approaches to harnessing wind energy, how about the winds that blazing-fast trains create (and mechanical forces and energy beyond that including the heat of stations, train car interiors and even the sweat of passengers) ? Around the world, small-scale projects are starting to find innovative ways to harness all this energy. Passengers waiting for a train on the platform are accustomed to the whoosh of wind when their train arrives. Making use of China’s high-speed rail network, designers Jiang Qian and Alessandro Leonetti Luparini have created a prototype of a small power generator called the T-box to make use of those gusts.
Knowing that all “good” things (a relative term if ever there was one) pass, I remain optimistic about human creativity and all of the ways that humanity is going to find to access energy that we never considered as a resource and have either been wasting the potential of or failing to harness the presence of – like wind which is as constant as the sun shining somewhere on this planet every minute of every day.
~ Information Resources
Pope Francis’s edict on climate change will anger deniers and US churches – http://www.theguardian.com/world/2014/dec/27/pope-francis-edict-climate-change-us-rightwing
History of Windmills – http://www.windmillworld.com/windmills/history.htm
Shattuck Windmill Museum – http://www.shattuckwindmillmuseum.org/
Wind Power Information – http://environment.nationalgeographic.com/environment/global-warming/wind-power-profile/
T Boone’s wind farm plans finally blow away – https://gigaom.com/2012/10/15/t-boones-wind-farm-plans-finally-blow-away/
How Has Fracking Changed Our Future ? – http://environment.nationalgeographic.com/environment/energy/great-energy-challenge/big-energy-question/how-has-fracking-changed-our-future/
6 Ways to Harness the Wasted Energy of Trains (and Their Passengers) – http://www.popularmechanics.com/science/energy/efficiency/6-ways-to-harness-wasted-transit-energy#slide-5
Blog author ~ Deborah Hart Yemm is co-founder of
Yemm & Hart, a green materials producer