Recycling of wind turbine blades

How are wind turbine blades recycled?

Reading time: 3 minute

Approximate 85% of turbine components, including steel, copper cables, electronics and gear can be recycled or reused. But fiberglass blades are difficult to remove.

In order to be transported, they they are cut into three pieces with an industrial saw with a diamond blade. This method leads to prohibitive long-distance transportation costs.

So, companies are now looking for ways to deal with the tens of thousands of shovels that have reached the end of their lives, many of which are not the most environmentally friendly, burying them forever is also not ideal.

Why are wind turbines used?

To prevent catastrophic climate change caused by burning fossil fuels, many governments and corporations have promised to use only green energy until 2050. Wind energy is one of the cheapest ways to achieve this goal.

Strathclyde University of Glasgow recycling solution

A team of researchers at Strathclyde University in Glasgow has discovered a method to recycle certain composites used in wind turbine blades, which were previously impossible to recycle, which is why thousands of obsolete blades were buried annually.

The university has developed a thermal recovery and post-treatment process of glass fibers from polymer composites reinforced with glass fibers, found in wind blades, to obtain almost perfect quality glass fibers.

This composite used in wind turbine blades is considered a hard material to recycle and usually goes straight to the landfill. If implemented globally, it is estimated that the technique will meet almost half of the global demand for fiberglass.

"Recycling fiberglass can turn composite waste into reusable fiber and could serve 50% of global fiber demand glass if implemented worldwide. As the process produces both medium value and high value fibers, a wide range of markets can be covered, from less demanding products to high performance products.

Recycled GRP (fiberglass) will also be attractive to industries outside the wind farm and can be adapted for a wide range of composite applications.

Today, GRP is used in sectors such as car production, shipbuilding, oil and gas production, construction and sporting goods. ", shows the University.

Aker Offshore Wind and Aker Horizons

For this reason, the university has signed a memorandum of understanding with Norwegian offshore wind developer Aker Offshore Wind and green investment company Aker Horizons to implement its new technology.

The recycling method developed by Global Fiberglass Solutions

Also, a start-up, Global Fiberglass Solutions, has developed a the method of breaking the blades and pressing them into granules and fiberboard to be used for floors and walls.

The company started the production of samples at a factory in Sweetwater, Texas, near the largest concentration of wind farms on the continent. The company is planning another operation in Iowa.

"We can process 99,9% of a blade and we can go through almost 6000 - 7000 blades per year per factory ", said the director general Don Lilly. The company has accumulated an inventory of shovels in almost a year, which are ready to be shredded and recycled as demand increases, according to him.

"When we start selling more to builders, we can get more. Now we're just getting ready.", he said.

Bibliography:

https://energy-center.ro/

http://adev.ro/qk9558

http://politicalforum.com/

 1,294 total hits, 1 hits today

13 comments

  1. I saw how these blades were buried when they could no longer be used. Green energy is not so green. There is something similar about photovoltaic panels. They are difficult to recycle.

    1. Exposure to ultraviolet lightning, lightning, birds, and occasionally strong winds. I think that microcracks or an aging of the material as a whole appear.

    2. During the life of the blades of about 20 years, they must withstand huge loads that can lead to their damage. Wind turbine blade repairs are made with epoxy or polyester resins and fiberglass or carbon fiber.

    1. Very good question. The idea is that these blades have reached a certain stage of degradation, they can no longer be repaired. Curiously, no one has thought, until recently, that the material from which they are made is difficult to recycle. Probably it's all about money here.

  2. The idea was, how it degrades in the wind, and when it comes to the shredder it suddenly turns and I'm hard to destroy! Isn't life much underestimated? What happens if they are not replaced in time? Do they break into pieces? Well, problem solved! 😉

    1. Very well exposed point of view. Most likely the lifespan is much underestimated. Like I said, I think it's more about money here.

  3. The material is likely to age, crack and need to be replaced without waiting for the blades to break. I assume they are made of fiberglass. I think it could be crushed and then used in the reinforcement of concrete in construction.

  4. They are exposed to high forces, weather and ultraviolet rays and after a while they no longer have safety in operation. Breakage during operation would cause enormous damage whose costs would far exceed the cost of new blades. Nobody takes a risk. It is exactly like in aviation where after exceeding the resources of an engine, it is changed even if it still works very well. Outdated engines from aviation are later used in ground applications as gas generators, power source for various applications, etc. At some point, they will also find a reuse solution for these blades.

  5. And if you don't change them and leave them for the entire duration of the wind turbine, doesn't the problem remain the same? Or do the blades dissolve on their own? It is simply safety in operation. this is why he changes them periodically.

Add a comment

Your email address will not be published. Required fields are marked with *

The maximum upload file size: 2 MB. you can upload: image, audio, video, document, spreadsheet, Interactive, text, archive, queues, other. Links to YouTube, Facebook, Twitter and other services inserted in the comment text will be automatically embedded. Drop file here