Are Recyclable Wind Turbines on the Horizon?

 Here is a report taken from one of my favourite websites; Earth 911

     

"Looming Waste Management Issues

The design life of wind turbines is about 20 to 25 years. The longest wind turbine blade to date is 350 feet, almost the length of a football field. Although certain parts of wind turbines can be relatively easily recycled, others are not designed for recyclability. In particular, wind turbine blades present the biggest waste management challenge, but researchers from the National Renewable Energy Lab (NREL) in partnership with Arkema Inc. are making progress in this area.

Most wind turbine blades are currently constructed with composite material infused with a thermoset resin, which makes them highly durable to withstand storms and the elements. Unfortunately, thermoset plastics are almost impossible to recycle, so the blades do not have much scrap value and are not very appealing to recyclers. Therefore, many spent turbine blades are piling up in landfills, although some reinforced plastic blades are downcycled into cement products.

Promising Turbine Blade Research

The good news is that researchers have developed a blade out of thermoplastic resin (instead of thermoset resin) that is low-cost, lightweight, and seems to be recyclable. If the new blade also proves to be durable, this could be a gamechanger for the offshore and onshore wind industry. Lower costs also could help boost wind energy deployment, reducing the use of fossil fuels. A lightweight blade is easier to transport and uses less fuel. It also seems easier to recycle and uses less energy in the manufacturing process. These are all wins for the environment and the wind energy industry.

“With thermoset resin systems, it’s almost like when you fry an egg. You can’t reverse that,” said Derek Berry, a senior engineer at NREL in a press release. “But with a thermoplastic resin system, you can make a blade out of it. You heat it to a certain temperature, and it melts back down. You can get the liquid resin back and reuse that.” This means that the blades could be recycled instead of downcycled into lower-value goods.

So far, the thermoplastic resin blade durability looks promising. “The thermoplastic material absorbs more energy from loads on the blades due to the wind, which can reduce the wear and tear from these loads to the rest of the turbine system, which is a good thing,” said NREL researcher Robynne Murray.

Although the research looks promising, progress will be slow. Most wind farms being constructed today will be decommissioned in a few decades. The benefits of recyclable blades are still decades away at best. The decommissioning of wind farms and the associated environmental impact has largely been a blind spot for the industry. Hopefully, recent advances will help make wind power even greener. Despite the waste issue, wind power is still one of the most sustainable sources of energy.

By Sarah Lozanova

Sarah Lozanova is an environmental journalist and copywriter and has worked as a consultant to help large corporations become more sustainable. She is the author of Humane Home: Easy Steps for Sustainable & Green Living, and her renewable energy experience includes residential and commercial solar energy installations. She teaches green business classes to graduate students at Unity College and holds an MBA in sustainable management from the Presidio Graduate School."

Let us hope that they can resolve this issue before we have all these things in the landfills, there are areas that have all the broken blades lying around on the ground, just left there to rot. I really do wish that they had thought of all these things before they mass produced and jumped on board the "Green Energy Train".  It seems that we are always playing catch-up, realising after the event that "oh maybe we should have thought of this before"over and over again.  We have the problems with old mobile phones and old solar panels coming to our attention now! How long have mobile phones been around and only now do we realise that disposing of them is a problem. The solar panel manufacture and disposal issue is rearing it´s ugly head now, making question them.

When will we learn?

The blog song for today is " People are strange" by The Doors

TTFN