from the land-where-palm-trees-sway dept.
Wind technology is growing—literally. Today's offshore wind turbines can tower more than 490 feet above ground, their spinning blades churning out up to 8 megawatts (MW) each—about enough to power 4000 homes in the U.S.
But with their increasing size comes challenges. Off the east coast, where offshore turbines are located in the U.S., increasingly powerful Atlantic hurricanes pose risks to the structures themselves and to the future of wind energy. To make those turbines more hurricane-resilient, a team of CU Boulder researchers are taking a cue from nature and turning the turbine around.
"We are very much bio-inspired by palm trees, which can survive these hurricane conditions," said Lucy Pao, Palmer Endowed Chair in the Department of Electrical, Computer and Energy Engineering.
Traditional upwind turbines face the incoming wind, and to avoid being blown into the tower, their blades must be sufficiently stiff. It requires a lot of material to build these relatively thick and massive blades, which drives up their cost. Turbine blades on downwind rotors, however, face away from the wind, so there's less risk of them hitting the tower when the winds pick up. This means they can be lighter and more flexible, which requires less material and therefore less money to make. These downwind blades can also then bend instead of break in the face of strong winds—much like palm trees.
[...] Ultimately, she believes a combination of improved controllers, lighter and resilient materials, and strategic turbine configurations could allow for giant offshore turbines to outpace the competition. They're not only more cost-effective and energy efficient, allowing for one big turbine instead of many smaller ones (which would reduce installation and maintenance costs), and able to capture faster wind speeds higher off the ground, but they could also withstand the more severe weather sure to come.
"Wind turbine blades are typically designed to last at least 20 years, and we want our novel concept blades to achieve similarly long lifetimes," said Pao.
I realise that this has been an unpleasant time for many of our anonymous community members, but I can assure you that it has been necessary. I am not yet prepared to go into details but I can at least update you with our findings so far. But first we have to look at some historical data.
Anonymous Cowards (ACs) have always been - and will hopefully continue to be - welcome members of our community. There are many perfectly understandable reasons for wishing to post as AC and how you chose to live your own personal life is of no concern of this site. Equally, you are welcome to use VPNs and other security measures to protect your privacy. We take similar measures to protect all of your data so that you will not be compromised by us. These measures are effective and to the SN administration ACs appear as a single user with the user identity of #1.
We cannot treat some ACs differently from others. While we can manage to sort out your comments etc with the aid of the hashes that we produce, they change so frequently as to be useless for any purpose outside of this site. But the Administration is only concerned with what happens within this site and so this point is moot. We have no interest in the rest of the internet so IP addresses are also of no interest to us. How your comments get from wherever you are to us is irrelevant. The bottom line is that ACs can only be treated as a single account. That account is granted certain permissions or not granted those permissions and they apply to every AC interaction.
Most of our community, both logged in and AC, participate in the discussions in an reasonable manner and discuss the topic that has been outlined and any threads that resulting from it. It is true that, particularly at weekends, there is a slight increase in the number of ACs appearing but on their own they are little more than a minor irritant. There is, however, a 3rd group, consisting of ACs who sole purpose seems to be to derail any sensible discussion. Over recent years they have become more aggressive and often use personal attacks rather than challenging what is being said. Some are more obvious than others and I am sure that you can all think of examples of such people for yourself. A very small number have stated that it is their aim to prevent SoylentNews from continuing.