Introduction Sustainability in San Francisco International Airport, USA
San Francisco International Airport (SFO) is committed to sustainability, implementing initiatives to reduce environmental impact.
From energy-efficient infrastructure to waste reduction programs, SFO aims to be a model for eco-friendly aviation practices. Through partnerships and innovative strategies, the airport strives to balance growth with environmental responsibility, contributing to a greener future for air travel.
Get to know San Francisco International Airport, USA
San Francisco International Airport (SFO) is a major hub located 13 miles south of downtown San Francisco, California. Handling over 50 million passengers annually, it ranks as one of the busiest airports in the United States. SFO serves as a gateway for both domestic and international flights, connecting travelers to various destinations worldwide.
Key features of SFO include state-of-the-art terminals, such as the iconic International Terminal, which reflects the region’s cultural diversity. The airport is renowned for its commitment to sustainability, with initiatives ranging from energy-efficient facilities to waste management programs.
SFO provides a wide array of amenities for travelers, including diverse dining options, shopping outlets, lounges, and art installations. Efficient ground transportation options, such as the Bay Area Rapid Transit (BART) and shuttle services, link the airport to the city and surrounding areas.
As a technology and innovation hub, SFO continues to adapt and enhance its services to meet the evolving needs of passengers, making it a crucial hub for both business and leisure travel on the West Coast.
San Francisco International Airport, USA Profiles Data
San Francisco International Airport (SFO) is a major international airport situated in San Mateo County, near San Bruno and Millbrae, 13 miles south of downtown San Francisco, California. Opened in 1927, SFO has grown into one of the busiest airports in the United States.
Key Features:
1. Passenger Traffic: SFO handles over 50 million passengers annually, serving as a crucial hub for domestic and international travel.
2. Terminals: The airport consists of multiple terminals, with the iconic International Terminal showcasing cultural diversity through art and design.
3. Sustainability: SFO is recognized for its commitment to sustainability, implementing various eco-friendly initiatives, such as energy-efficient buildings and waste reduction programs.
4. Amenities: Travelers at SFO enjoy a range of amenities, including diverse dining options, shopping outlets, lounges, and art installations.
5. Transportation: Efficient ground transportation options like BART (Bay Area Rapid Transit) and shuttles connect the airport to the city and surrounding areas.
6. Innovation Hub: Located in the tech-savvy San Francisco Bay Area, SFO continues to embrace technology and innovation to enhance passenger experience.
History of San Francisco International Airport, USA
San Francisco International Airport (SFO) has a rich history dating back to its opening in 1927.
Here are key points in its development:
1. Establishment: SFO was established as Mills Field Municipal Airport in 1927, named after the Mills Field Flying School of the early 1920s.
2. Expansion in the 1930s: The airport expanded during the 1930s, with new terminal buildings and runway developments.
3. Military Use during World War II: SFO played a crucial role during World War II as a major military airfield.
4. Post-War Growth: After the war, the airport returned to civilian use and experienced significant growth in the post-war era.
5. Name Change: In 1955, it was renamed San Francisco International Airport to reflect its growing international air traffic.
6. Jet Age and New Terminal: With the advent of jet travel in the 1960s, SFO built a new terminal to accommodate the increased demand for air travel.
7. Expansion and Modernization: Throughout the latter half of the 20th century and into the 21st century, SFO underwent multiple expansion and modernization projects to keep pace with the evolving aviation industry.
8. Innovation and Sustainability: SFO has become a leader in airport sustainability, implementing initiatives such as energy-efficient facilities and waste reduction programs.
9. International Terminal: The International Terminal, opened in 2000, is a notable architectural landmark that reflects the cultural diversity of the San Francisco Bay Area.
10. Current Status: Today, SFO continues to be a major international gateway, known for its commitment to sustainability, technological innovation, and providing a diverse range of services for millions of passengers each year.
Renewable Energy and Sustainability in San Francisco International Airport, USA
San Francisco International Airport (SFO) has been a pioneer in implementing renewable energy and sustainability initiatives, reflecting its commitment to environmental responsibility.
Key features include:
1. Solar Power: SFO has integrated solar power extensively, with solar panels installed on various facilities and structures. These solar installations contribute to the airport’s energy needs while reducing its carbon foounergy-Efficient Buildings:** The airport has focused on constructing and retrofitting buildings with energy-efficient technologies to optimize energy usage and decrease overall environmental impact.
3. Waste Reduction: SFO has implemented comprehensive waste reduction programs, including recycling initiatives and waste diversion strategies, to minimize the amount of waste sent to landfills.
4. Water Conservation: The airport has adopted water conservation measures, including efficient irrigation systems and water-saving technologies, to minimize water usage and promote responsible water management.
5. Green Building Practices: SFO incorporates green building practices in its infrastructure projects, emphasizing sustainability and environmentally friendly construction materials.
6. Alternative Transportation: The airport encourages the use of alternative transportation modes by providing efficient access to public transit, including the Bay Area Rapid Transit (BART) system, reducing the environmental impact of passenger travel to and from the airport.
7. Carbon Offset Programs: SFO may have carbon offset programs in place, allowing passengers and airlines to invest in projects that reduce or capture an equivalent amount of carbon emissions to offset their own environmental impact.
8. Partnerships and Certifications: Collaborations with environmental organizations and industry partnerships help SFO stay at the forefront of sustainability practices. Certifications such as LEED (Leadership in Energy and Environmental Design) may be pursued for new construction or major renovations.
Energy-Efficient Buildings Implementation in San Francisco International Airport, USA
San Francisco International Airport (SFO) has demonstrated a commitment to sustainability by implementing energy-efficient building practices.
Key aspects of this implementation include:
1. Technology Integration: SFO incorporates advanced technologies and design strategies in its buildings to enhance energy efficiency. This includes efficient lighting systems, HVAC (heating, ventilation, and air conditioning) solutions, and smart building management systems.
2. LEED Certification: SFO may pursue LEED (Leadership in Energy and Environmental Design) certification for its new constructions or major renovations. LEED certification signifies a high level of environmentally conscious building practices, covering energy efficiency, water conservation, and overall sustainability.
3. Green Design Principles: The airport likely follows green building principles in its construction projects, emphasizing sustainable materials, energy conservation, and environmentally responsible practices.
4. Renewable Energy Integration: In addition to energy-efficient measures, SFO may integrate renewable energy sources, such as solar panels, on or around its buildings to further reduce its environmental impact.
5. Collaboration and Partnerships: SFO may collaborate with energy experts, architects, and sustainability consultants to implement cutting-edge practices in energy-efficient building design.
6. Continuous Improvement: The airport is likely committed to continuous improvement in energy efficiency, regularly evaluating and updating its buildings to align with the latest advancements in green building technology.
Green Design Principles in San Francisco International Airport, USA
San Francisco International Airport (SFO) incorporates green design principles in its infrastructure projects, emphasizing sustainable and environmentally responsible practices.
Key elements of green design at SFO include:
1. Energy Efficiency: Buildings and facilities at SFO are likely designed to maximize energy efficiency, utilizing technologies such as energy-efficient lighting, HVAC systems, and insulation to minimize energy consumption.
2. Renewable Energy Integration: Green design principles may involve the integration of renewable energy sources, such as solar panels, to generate clean and sustainable power for the airport’s operations.
3. Water Conservation: SFO likely incorporates water-efficient technologies and practices, such as low-flow fixtures and efficient irrigation systems, to minimize water usage and promote responsible water management.
4. Sustainable Materials: The airport likely prioritizes the use of environmentally friendly and sustainable materials in construction and renovation projects, minimizing the environmental impact of its infrastructure.
5. Waste Reduction and Recycling: Green design involves strategies to reduce waste generation and promote recycling. SFO likely implements waste reduction programs, diverting materials away from landfills.
6. Natural Lighting and Ventilation: Design principles may emphasize the incorporation of natural lighting and ventilation to reduce the need for artificial lighting and air conditioning, contributing to energy savings.
7. Landscaping for Sustainability: Landscaping practices at SFO may follow sustainable principles, including the use of native plants, efficient irrigation, and green spaces that enhance the overall environmental impact of the airport.
8. LEED Certification: SFO may pursue LEED (Leadership in Energy and Environmental Design) certification for its buildings, which sets standards for environmentally sustainable construction.
These principles collectively contribute to SFO’s commitment to sustainability and align with broader efforts to minimize the airport’s ecological footprint.
Sustainability Certifications for San Francisco International Airport, USA
San Francisco International Airport (SFO) has been proactive in obtaining sustainability certifications that demonstrate its commitment to environmental responsibility.
Some relevant certifications may include:
1. LEED Certification: SFO may pursue LEED (Leadership in Energy and Environmental Design) certification for its buildings and infrastructure projects. LEED is a widely recognized green building certification that considers factors such as energy efficiency, water conservation, and sustainable materials.
2. Airport Carbon Accreditation: This program, initiated by Airports Council International (ACI), assesses and recognizes airports’ efforts to manage and reduce their carbon emissions. SFO might participate in this accreditation to showcase its commitment to carbon reduction.
3. ISO 14001 Certification: ISO 14001 is an international standard for environmental management systems. It involves a systematic approach to environmental management and could indicate SFO’s commitment to minimizing its environmental impact.
4. Green Business Certification: SFO may pursue local or regional green business certifications, demonstrating adherence to environmentally friendly practices in its day-to-day operations.
5. Sustainability Reports: While not a certification, SFO may regularly publish sustainability reports outlining its environmental initiatives, achievements, and goals. These reports provide transparency and accountability in the airport’s sustainability efforts.
Carbon Offset Programs in San Francisco International Airport, USA
San Francisco International Airport (SFO) may offer carbon offset programs as part of its sustainability initiatives. Carbon offset programs allow travelers to compensate for their flight-related carbon emissions by investing in projects that reduce or capture an equivalent amount of carbon elsewhere.
Key points related to carbon offset programs at SFO may include:
1. Voluntary Participation: SFO’s carbon offset program is likely voluntary, giving passengers the option to participate in mitigating the environmental impact of their air travel.
2. Project Types: The airport may collaborate with environmental organizations to support a variety of carbon offset projects. These projects could include renewable energy initiatives, reforestation efforts, or methane capture programs.
3. Financial Contributions: Travelers interested in offsetting their carbon footprint may make financial contributions at designated points within the airport or through online platforms. The funds are then directed towards verified carbon reduction projects.
4. Awareness Campaigns: SFO may run awareness campaigns to inform passengers about the carbon offset program, emphasizing the importance of sustainable travel practices.
5. Tracking and Reporting: The airport may track and report on the success and impact of its carbon offset program, ensuring transparency and accountability in environmental initiatives.
Renewable Energy Integration in San Francisco International Airport, USA
San Francisco International Airport (SFO) has demonstrated a commitment to renewable energy integration as part of its sustainability initiatives.
Key aspects include:
1. Solar Power Installations: SFO has implemented solar power systems across various facilities, including parking structures and terminal buildings. These solar installations contribute to the generation of clean and renewable energy.
2. Energy-Efficient Technologies: The airport incorporates advanced energy-efficient technologies in its infrastructure to optimize energy consumption. This includes efficient lighting, HVAC systems, and other technologies designed to reduce overall energy demand.
3. Renewable Energy Procurement: SFO may engage in renewable energy procurement agreements, sourcing a portion of its energy from renewable sources such as wind or solar farms. This helps reduce reliance on traditional energy sources and lowers the carbon footprint of the airport’s operations.
4. Partnerships with Renewable Energy Providers: Collaborations with renewable energy providers and initiatives may play a role in sourcing and integrating renewable energy into the airport’s energy portfolio.
5. Innovative Projects: SFO may explore innovative projects to harness renewable energy, potentially utilizing its infrastructure for energy generation while maintaining functionality and safety standards.
6. Carbon Reduction Goals: Renewable energy integration aligns with SFO’s broader sustainability goals, contributing to efforts to reduce carbon emissions and environmental impact.
Commercial Activity in San Francisco International Airport, USA
San Francisco International Airport (SFO) is a major hub with a vibrant commercial environment offering a range of services and amenities for travelers.
Key aspects of commercial activity at SFO include:
1. Diverse Retail Outlets: SFO features a variety of retail options, including duty-free shops, luxury boutiques, and souvenir stores. Travelers can find a wide range of products, from electronics to clothing and local specialties.
2. Dining Options: The airport offers diverse dining choices, including restaurants, cafes, and fast-food outlets. Passengers can enjoy a mix of international cuisine and local flavors while waiting for their flights.
3. Lounge Services: SFO provides lounges for various airlines and premium passengers, offering amenities such as comfortable seating, Wi-Fi, refreshments, and business services.
4. Rental Car Services: Travelers have access to rental car services, allowing for convenient transportation upon arrival at their destination.
5. Airport Hotels: SFO may have on-site hotels or nearby accommodations, providing convenience for passengers with layovers or early departures.
6. Transportation Services: Commercial activities extend to transportation services, including taxis, rideshare services, shuttles, and public transit options, facilitating easy connectivity to and from the aaaiu
7. Business and Conference Facilities: SFO may offer business and conference facilities, providing spaces for meetings, conferences, and other business-related activities.
8. Art Installations: The airport’s commercial environment often includes art installations and exhibitions, showcasing local and international artists and contributing to the cultural atmosphere of the airport.
These commercial activities collectively enhance the overall travel experience for passengers at San Francisco International Airport, making it a dynamic and well-equipped hub.
Conclusion for Exploring Sustainability in San Francisco International Airport
San Francisco International Airport (SFO) stands as a notable exemplar of sustainability in the aviation industry.
Through a comprehensive approach, SFO has implemented various initiatives to minimize its environmental impact and promote responsible practices. From renewable energy integration, energy-efficient buildings, and waste reduction programs to the commitment to green design principles, the airport is dedicated to balancing growth with environmental responsibility.
SFO’s emphasis on sustainability extends beyond infrastructure to include commercial activities, with diverse retail, dining, and service offerings designed to enhance the traveler experience. The airport’s commitment to renewable energy, coupled with its support for carbon offset programs, reflects a holistic approach to environmental stewardship.
As a vital transportation hub in the San Francisco Bay Area, SFO not only connects people worldwide but also serves as a model for how airports can embrace sustainability without compromising operational efficiency. Continued innovation and collaboration with environmental organizations position SFO as a leader in the pursuit of a greener and more sustainable future for air travel.
https://www.exaputra.com/2023/11/exploring-sustainability-in-san.html
Renewable Energy
Omterra Rebrand, Goldwind Warns on Turbine Size
Weather Guard Lightning Tech

Omterra Rebrand, Goldwind Warns on Turbine Size
Siemens Gamesa rebrands as Omterra, Goldwind questions ever-bigger turbines, and MIT revisits the century-old Betz limit.
Sign up now for Uptime Tech News, our weekly newsletter on all things wind technology. This episode is sponsored by Weather Guard Lightning Tech. Learn more about Weather Guard’s StrikeTape Wind Turbine LPS retrofit. Follow the show on YouTube, Linkedin and visit Weather Guard on the web. And subscribe to Rosemary’s “Engineering with Rosie” YouTube channel here. Have a question we can answer on the show? Email us!
The Uptime Wind Energy podcast, brought to you by StrikeTape. Protecting thousands of wind turbines from lightning damage worldwide. Visit striketape.com. And now your hosts
Allen Hall: Welcome to the Uptime Wind Energy Podcast. I’m your host, Allen Hall, and I’m here with Rosemary Barnes, who is recovering from a very serious illness, Matthew Stead, who has been healthy pretty much all the Australian winter, and Yolanda Padron in sunny, hot Austin, Texas. Welcome, Rosemary
Rosemary Barnes: Thank you. I am recovering from man flu, and I say man flu because it’s just a cold, but I’m complaining a lot about it.
Allen Hall: there’s gonna be a new name for Siemens Gamesa. So it was Siemens and then Gamesa’s a separate company. They merged. Siemens Energy, uh, broke off from Siemens AG. So [00:01:00] that’s a very well-known name, Siemens. It’s– Everybody knows Siemens at this point around the world.
And the, the one family had, as a company, had s- label on everything, right? So it’s, uh, Werner von Siemens started it 150 years ago. It’s been a long time since Siemens was started, but it’s everywhere. It’s on turbines, transformers, and power plants around the world, and now they’re changing their name, right?
So when Siemens Energy broke off from Siemens AG, they, they had a limited time they could use that name, so they have rebranding themselves or are about to rebrand themselves, and I wanna pronounce this right, Omterra. O-M-T-E-R-R-A. Now, we did a little research on this, and I think it’s Latin for all of the world.
It’s kind of a conjoined, uh, set of words, Latin words, kind of a, a schmear in a sense. So, uh, so the company that, you [00:02:00] know, that spun off in w- roughly 2020, if I remember this right, Matthew, does that sound right? It was roughly 2020 when Siemens Energy was established on its own. Uh, they’re gonna be changing their name to Omterra.
So instead of seeing, seeing Siemens Gamesa publications or Siemens Gamesa wind turbines, I guess they’re gonna have this new name, Omterra. What do we all think?
Matthew Stead: I think it’s great. I think, and if you go back to, you know, GE Vernova, um, I, I thought Vernova was a bit weird for a while, but now it just rolls off the tongue and easy. It just makes so much sense. Um, so I’m, I’m, I’m for it. I, I like it. I’ve already… You know, can already say it. It took a lot longer to say Vernova than it’s taking to say
Terra.
Rosemary Barnes: I think that it– But it’s not Vernova, it’s GE Vernova, right? So everyone knows what it is. Whereas my understanding is it’s not Siemens Omtera, it’s just Omtera, which makes it sound like a new budget kind of [00:03:00] brandless, history-less, uh, company. So that’s… Yeah, I’m no
branding expert, but I think that, uh, like they, they must have not been able to use the word Siemens at all, um, because otherwise you surely would, because it has a very…
Outside of, you know, their blade issues and bearing issues of a couple of years ago, they do have a, like a solid engineering reputation across many fields, so you wouldn’t probably intentionally divorce yourself entirely from that. So, um, yeah, I, I think it will take some getting used to for me
Matthew Stead: but everyone remembers. I mean, it’s not like– The people in the wind industry know their heritage, they know their history, so I don’t think it matters. I mean, you know, you know, they, they purchase the Senvion, you know, technologies or, you know, licenses in Europe. You know, y- y- you don’t forget these things, so I don’t think it matters.
I think it’s just a, it’s a color, it’s a, it’s a label
Yolanda Padron: I think it’ll be fine. I just think that there will be a little [00:04:00] bit of confusion down the line as with everything, right? Like I’ve, I’ve been on the side of conversations where I have to explain like Siemens versus like SGRE on paper and it’s like, oh, it’s– this is why th- there was that paper trail, uh, because people would think it was an absolutely different thing.
Um, so I, I can totally see those conversations coming, coming to play in the future where someone thinks that Ontier is a completely different entity that maybe they changed OEMs or something, um, for a site. But nothing a little history lesson won’t fix, I guess.
Matthew Stead: You just want people talking about you
Rosemary Barnes: Name change every year
Allen Hall: Change your name every year. Well, that’s, that’s one way to approach it. I w- always wonder what the boardroom looks like and sounds like when this discussion is going on, because Siemens, Siemens Energy is a big company, and there had to be outsourcing of this to probably several marketing firms, mostly [00:05:00] in Germany, I’m guessing.
And they came back with a bunch of pitches, and eventually they picked one. But boardrooms are probably not the place to pick a name. And I always think like, “Oh, you just had such a opportunity to do something really cool or really impressive.”
Allen Hall: Well, we’ll see how it goes with Omterra. The, it’s gonna be, I’m sure, a huge marketing effort, and you’ll probably see commercials for it during the Super Bowl.
Developers are [00:06:00] eyeing Britain’s next big renewables auction and have been waiting to learn the rules and most importantly, the price. Well, this week the UK government delivered both. It confirmed a package of changes to the CFD scheme ahead of allocation round eight, aimed at simplifying the process and keeping good projects from being tripped up by some paperwork.
So AR7 was super successful, and they’re hopefully gonna have a, a great allocation round eight. Uh, unchanged from last round, here are some pieces to it. AR7 brought in 15 gigawatts of, of new capacity, uh, well below the ceilings, and the government is betting that that’s stability from AR7’s gonna exist for AR8, so they’re keeping the pricing limits the same.
And let me give you some of the numbers here. So everything’s in 2024 prices, just so we have a baseline here. It, 113 pounds per megawatt hour [00:07:00] for fixed bottom offshore wind, 271 pounds for floating offshore wind. That’s, uh, pounds per megawatt. And then 92 pounds per megawatt for onshore wind, and s- 75 pounds per megawatt for solar. So 271 pounds per megawatt hour in 2044 dollars is, you know, you’re probably talking, what, 290 pounds per megawatt hour. That’s a really good strike price or ceiling to allow, uh, some more floating wind into the UK waters
Rosemary Barnes: Yeah. Well, the UK have this newly signed agreement with Japan, right, to, to progress development of that technology. I feel like I, I haven’t looked up any numbers to back this up, but I feel like the gap between fixed bottom and floating is narrowing. It’s barely more than double now, which, um, yeah, I think is not that bad considering how little development there has been for floating offshore wind compared to fixed bottom.
So [00:08:00] yeah, I think that it is an interesting technology to develop. I, I know with the, um, auction rounds and ’cause it’s a government thing, it’s easy to think, “Oh, why are you spending any money on anything other than the cheapest one?” Because y- you know, like, it, it feels weird that the government would play, you know, when they’re purchasing power for their grid, that they would do any more than trying to just get, you know, bulk power at the cheapest price possible whilst ensuring, you know, reliability.
Um, but in the previous or the previous, the one– last one or the one before that, they had quite a few tidal projects announced that certainly, you know, an expensive and not mature technology. But I think that you can’t say the same thing about floating offshore wind. I think that it is on a, like a good, a good development trajectory, and there are certainly places on Earth where floating offshore is one of the most appealing technologies.
You know, if you think of through to 2030s, 2040s, there’s plenty of places where, um, you know, slightly higher [00:09:00] price paid for floating offshore wind will still be worth it because they have so few other options available. So it makes sense as an industry to in- invest in capabilities there.
Matthew Stead: think it’s a really interesting method. It seems to be really successful, the contract for di-difference approach. So, um, I’m, I’m surprised that it’s not adopted more widely, um, in other locations,
Rosemary Barnes: it is around a bit.
I would like to see it, like, in, in Australia, we are, we are developing some new wind projects, but not as fast as we need to, to, you know, hit our upcoming targets. And I think, like, while the government is doing some things to help move or help incentivize developers, it’s not working that well, and maybe CFD would be a, you know, a bit of a better way to, like, just actually guarantee that these projects are gonna go ahead.
Allen Hall: Australia has a shipping problem. there’s been a concern at state-owned transport hubs are becoming less supportive of [00:10:00] wind energy projects with ACEN Renewables saying that they will now have to truck a large transformer from a wind project or for a wind project in northern New South Wales from the Port of Adelaide.
That’s not necessarily close. And h- they also said that the Port of Brisbane has refused to accept passage of some big transformers for a solar farm. also there’s some, uh, something about blades not being able to be accepted in certain ports. Like some of the, uh, Australian state-managed or state-owned ports are not accepting renewables.
Rosemary Barnes: I think
also that blades in Queensland can only be transported to site like one per day with a full police escort or something. It’s wild to
me ’cause, you know, like I lived in, in Denmark for so long and there were blades going up and down just the normal highway every single day, multiple like, uh, and three– they would go in sets of threes for obvious reasons.
Um, yeah, but the, the, the [00:11:00] Queensland government changed like a, a year ago or, or so, and it changed to a very anti-renewables government and they just threw all of the state’s renewable plans in the bin,
Allen Hall: such a recent change that when they, at least the news articles I’ve seen about it, I’ve only seen a handful, that they have, um, like last year some big transformers, like really difficult to move items have come through those ports and they’re just not letting them through now. How does that work?
If you have a, a, a legal right to build a wind farm or a solar farm or, or substation or whatever’s going on there, how do they reconcile not allowing those components to come through a port? In what world does that make sense?
Matthew Stead: I mean, most of the ports are– yeah, most of the ports are privatized, so it’s up to the individual commercial entity that’s running the port, I would, I would imagine. So it’s beyond the control of the government, would be my first guess.
Yolanda Padron: it seems like it’s an, a federal sort of thing that would give permits.
Matthew Stead: No, I mean, I’ve done a bit of work in the Port of Melbourne and, [00:12:00] um, it’s facilitated by the government, uh, state government, not federal, and but the ports are largely privatized.
Rosemary Barnes: I just pulled up an article and it says that it’s state-owned transport hubs are becoming
less supportive of wind energy projects. Um, yeah, and that’s the reason for why they’ll have to get that transformer in northern New South Wales, so very close to Queensland. They have to go from Adelaide, where you live, Matt, all the way through South Australia, maybe Victoria, New South Wales, and then, yeah, up to nearly the border.
Allen Hall: Is that just a temporary blip that the next election cycle it’ll revert back or is this something that’s more long term?
Rosemary Barnes: uh, it’s not obvious that it’s gonna flip straight back, that’s for sure
Allen Hall: [00:13:00] for years, the race in wind has run mostly in one direction: bigger and bigger blades, bigger towers, bigger machines.
And now a chief engineer f- at one of China’s largest turbine makers says it’s time to pump the brakes. Bo Juul Petersen, uh, Goldwind’s chief engineer in Denmark, argues that scaling turbines up no longer makes economic sense. So it’s not an engineering question, it’s an economic question. His reasoning rests on a simple rule of geometry, the square cube r- law, which says that as a turbine grows, its materials and costs climb faster than the rotor area that earns the revenue.
Past a certain point, he says, bigger simply costs more than it makes. Have we crossed that threshold yet? Is 20 megawatts that, [00:14:00] uh, pivot point where it doesn’t make any more sense to make a larger turbine?
Matthew Stead: didn’t we have problems when we went from three to six?
Allen Hall: One to two.
Matthew Stead: I, I, I think, uh, I think it’s good that someone’s actually coming out and saying this
Yolanda Padron: Whoa, whoa, whoa. Rosie’s on the podcast.
Rosemary Barnes: yeah, ex-excuse me, this is one of my topics of obsession that I constantly carry on about. I made a whole, a whole video about it with, um, equations to back up my opinions about scaling, um, and a very nifty tug of war metaphor between economic factors that favor big wind turbines and economic fav- factors that favor small ones.
And I think that we’re always a little bit ahead of, of what the right, the right balance is between those. So, you know, the benefits from having bigger turbines are that, um, you have fewer electrical connections, for offshore especially, that means less subsea cables and, um, yeah, just like much faster Faster construction of all that, you [00:15:00] know, less, uh, substructures and less, less of everything to install, less of everything to maintain as well.
You know, it doesn’t take so much longer to get up and do your annual maintenance checks of a big turbine compared to a small one. Like, it takes longer, but not, not that much longer. Um, but then all of the structural factors favor smaller turbines over bigger ones. blades especially, as they get longer, you get so many more problems in O&M, but they don’t show up on the developer’s spreadsheet, you know. The spreadsheet that you’re using to decide, um, your f- your final investment decision, it, it doesn’t, it doesn’t know that you’re gonna have a whole bunch of blade issues.
It doesn’t wanna know and so I think that that’s one factor that has pushed us past the economic point of where wind turbine size should be. And I think the other thing is prestige. I know that when I worked at LM, you know, we had the longest blade in the world.
It was 88 meters, was our first, um, world record that we set while I was working there. They’d had many before that. We had– They [00:16:00] had a, like, one-to-one scale printout of it that they took to WindEurope or WindHamburg, um, that everyone stood in front of, and then they lost it to somebody, and then they got it back again with the blade for the Halieade-X.
And we all know how well that went to, you know, have the world’s longest blade. Y- you know, it wasn’t so easy to make it, turned out. It’s very easy to announce and not so easy to make, um, with reliable quality. And now we’ve got all these Chinese companies, especially MingYang, is constantly announcing the world’s biggest something.
Um, don’t sell so many of them, but it’s not the point, isn’t to sell them, it’s to have the prestige of making the world’s biggest something.
Allen Hall: Yeah, what would be the technology breakthrough that would allow it to be more stable at a 20 or 25 megawatt? Because right now I’m, I’m seeing 1% improvement here and there, not 5%, 10%.
Rosemary Barnes: Yeah, I mean, 1% improvement will eventually add up to what, what you need. Maybe it’s in
20 years’ time, not 10 years’ time. But y- you know, like you can imagine anything. maybe [00:17:00] they start somehow, like aero and automotive manufacturing technologies get cheap enough that we can start making wind turbine blades with all prepregs instead of y- you know, um, you know, dry fabric and infusion.
For example, maybe 3D printing gets cheap enough that you can make your whole, whole blade from an additive process. Like a- anything like that. But it can also be other things like maybe the cost of subsea cables in- increases like a whole lot, and then if, you know, like things on one side getting more expensive can make it more worthwhile to save hard problems somewhere else. So that’s why I say it’s like a, it’s a, a ve- it’s a multivariable optimization problem that changes every time you have a…
Like for every project to project from year to year, it’s always gonna be slightly different. So I don’t think it’s wise to definitively say 20 megawatts is the threshold that we should never cross. Like I, I don’t agree with that.
Allen Hall: It’s one of those arguments, I think, about [00:18:00] any sort of technology about where the endpoint is. There’s too many variables to predict it. I always point to aviation in which older airplanes will hang around and hang around and hang around until the fuel price goes up enough where it doesn’t make sense to operate them.
So they will fly an airplane un-until they can no longer structurally do it. But if the price of oil shoots up and the price of aviation fuel bumps up, those airplanes get parked, and then they’re buying the new airplane with a more efficient engine. It’s a similar thing, I think. There’s just– You can’t tell where the technology’s gonna go or what the economic impacts of any part of that business will force you to do something different.
So it’s gonna be higher than 20 megawatts, guarantee you that.
Yolanda Padron: Well, it’s one of those things too, right? Where if we’re repeating the, the same blade type and we’re getting smarter about operating that same blade type, then the economic cost goes down, [00:19:00] right? Like, eventually. ‘Cause then you’re not just experimenting on every new thing or having to take all of the, the funding into tr- specializing techs or getting very specialized techs onto your site and finding a new– kind of the wheel every so often. [00:20:00] So speaking of larger wind turbines, evidently we’ve been doing this all wrong, that we’ve had the calculations for the, uh, Betz limit has been off, and, uh, a group of MIT engineers, I guess, uh, have, have made a breakthrough.
Allen Hall: So basically every wind turbine that is spinning today is based on some fundamentals, uh, math, empirical data in, in some level, but on formulas that have led us to design the wind turbines and that core formula called the momentum theory. And if you hear blade designers who hang around blade designers, which I don’t necessarily recommend, but if you do hang around blade designers, they, they’ll say the momentum theory, momentum theory, like, “Yeah, yeah, yeah, yeah, I got it.”
It, it, the– MIT is saying it breaks down exactly at the operating point where modern turbines try to live. Um, so for a century the fix [00:21:00] was a patchwork of corrections and useful, but with no real theory behind them. Now, a team at MIT said it has rebuilt the math from first principles, creating what they call a unified momentum model. It even nudges at the famous Betz limit, the century-old ceiling on how much energy a rotor can capture, and it bumps it up by a few percentage points, and that would be the first uptick to the Betz limit in over 100 years. All right, Rosemary, as our official Betz limit expert, does this make any sense?
Have the MIT folk something new?
Rosemary Barnes: a wind turbine blade, its aerodynamics are just the same aerodynamics as what keeps an airplane in the sky, right? It’s, it’s all the… It’s just an airfoil. It’s just facing a wind speed, um, you know, a local wind speed. It’s complicated by the fact that [00:22:00] a wind turbine blade is also rotating, so the wind speed is different along the whole span, and that’s, uh– and so is the flow angle, and that’s why blades are twisted and tapered.
Um, but you know, essentially when you wanna figure out how much energy, uh, a wind turbine is gonna generate or you wanna design the blade so that it optimizes that amount, you’re just slicing it up into a whole bunch of little bits of 2D flow, exactly the same as an, an airplane. So if it doesn’t work for wind turbines, then it shouldn’t work for airplanes either.
So that’s one fundamental thing. And also at Betz limit, it’s not like it’s not driving design. It’s more like if you, if your design exceeds the Betz limit for a, um, a horizontal axis wind turbine, then you– it’s like a sanity check that you’ve done something wrong. Uh, that’s, that’s what I would say you would mostly use it for.
Um, but what I don’t understand, and maybe Alan, presumably you did read the, read the research or at least the press [00:23:00] release. Are they arguing that y- um, like the tips of a wind turbine blade are rotating, are moving fast enough that it’s approaching transonic flow? ‘
Allen Hall: Yeah, it’s a rental number thing.
Rosemary Barnes: there’s different types of aerodynamic equations depending on how fast the, airfoil’s moving.
And my understanding is transonic is like 0.8 Mach, um, 0.8, which is 274 meters a second, which is more than double what, um, the fastest tip speeds are currently. So I would think that you’re not quite approaching that yet. They’re– It’s not like a cutoff that, you know, all of a sudden at that exact, exact speed the air behaves totally differently.
But, um, y- yeah, like it seems far enough away that it’s not that relevant. But is that what they’re getting
at or, or is it something different?
Allen Hall: I like doing sanity checks when I read things from MIT. So what blade [00:24:00] manufacturers and/or wind turbine OEM has designed a set of blades and go, “Oh my gosh, we’re getting more energy than what we calculated,” and not thought to themselves, “Huh, maybe we should look into that”? It’s, it’s, it’s hilarious almost that all the engineers working in wind for 100 years wouldn’t have stumbled across this, where the turbine produces more power than the Betz limit would say it would.
Y-
Rosemary Barnes: yeah, as many people have commented on, you know, any one of my YouTube videos about wind turbine aerodynamics, if they would just put more blades in there, then, you know, less wind would just fly through without ever being, um, y- without ever hitting a blade.
So, you know, like obviously wind turbine, uh, blade aerodynamics people are stupid because if they weren’t, then they would see that you just put more blades in and you get more, twice as many blades, twice as much energy and w- What about three times as many blades? Three times as much energy.
And I [00:25:00] didn’t even go to MIT and that’s just, you know, like just
brilliant
Allen Hall: Obvious
Rosemary Barnes: off the top of my head here.
Allen Hall: it’s sort of ludicrous, honestly, and I see these things in wind occasionally. I see it more often in other areas, particularly aerospace, where, where you just have to go, “What are we spending time on?
Really? We’re working on this? On a fraction of a percentage point that we may have a slight error in?” Like, it does not matter. What are you gonna do with that?
Rosemary Barnes: there’s two issues. One is that the person writing up the press release is not the person that did the research, and they will always blow it up to be much more groundbreaking than the engineers who actually worked on it probably think it is.
So, the, like, I think you have to, like, reserve your criticism of the work and try and criticize the press release. And then the second error that I commonly see is that people don’t have an un- good understanding of a status quo. So they think that they have smashed the status quo, but really it’s more to do with them not understanding the status quo than it is through [00:26:00] some legitimate, like, massive im- improvement.
So it could well be that this is all very good and correct work, just with limited practical implication. That would be my most expected, um, from this.
Allen Hall: Rosemary, how many times a month do you get queries about wind turbine improvements that are just physically impossible?
Rosemary Barnes: Oh, I mean, if I read all of the comments on my YouTube channel, then probably quite, quite frequently. But, um, yeah, the most common one is just people thinking you can just add more blades and get a proportional increase in, um, in energy, you won’t get more power from adding more blades if that’s the only thing that you do, because in a well-designed wind turbine, which modern ones are, every, e- every air molecule that goes through the rotor disc is gonna interact with the, um, with, with a blade.
That’s how it’s, it’s designed. The blades are moving really fast, and so every molecule doesn’t get hit, but, you know, every, every molecule is affected and has some energy extracted from it. Um, then the other thing is people [00:27:00]who think if you reduce drag, like if you can come up with a lower drag airfoil or a higher lift airfoil, then you think, they think that that relates to more energy proportionally.
So they’re like, “Oh, this airfoil has twice as much lift, so it’s gonna be twice as much power.” It’s like, actually, you know, wind turbine designers are aware of the full range of, you know, airfoils that are available, including high lift ones, and they’re not using it because, you know, the same reason the airplane wings aren’t just, you know, like the highest, highest lift airfoil.
Y- you know, it’s more of a lift to drag ratio type thing, and that’s true for wind turbine blades as well, but also there’s structural considerations probably more so in a wind turbine blade than there are in, um, in airplane wings. So, you know, there’s some sacrifices made for that. Um, yeah, but those are the two, two main families of, of mistakes that I’d say people make.
Allen Hall: So
Rosemary Barnes: Matt
Allen Hall: up to his hand up for
to MIT media representatives
Matthew Stead: uh,
I had a couple of sort of quick and simple points. The first of all, uh, I’m actually a graduate of [00:28:00] MIT. I’ve graduated from, uh, from a course at MIT. Um, so that’s the first thing. Um, not in engineering. Um, the next one is like, so what? I mean, we can’t even reliably measure, um, you know, AEP the other one is all models are wrong.
Yolanda Padron: But not just wind
Matthew Stead: the world is not perfect. All models are wrong, so trying to improve something that’s wrong, you know, might help a little bit, but does it really matter?
Rosemary Barnes: But it is also the job of academics to improve these models. So there’s nothing wrong with MIT spending a lot of energy to, um, you know, improve on an incorrect model with another incorrect model. Uh, if it’s more useful, that’s great, and even if it’s not, like isn’t that the job of
Matthew Stead: yeah.
Matthew Stead: you should add to where it has the most impact on humanity. You should actually put the effort into areas that have a greater impact on pushing the boundary. You know, pushing small boundaries does not help the world
Allen Hall: Matthew is an MIT graduate, [00:29:00] the one thing that Matthew brings to the table is real-world experience. And that if you shelter yourself inside a laboratory at MIT, and I understand why you would do that, because I’m sure it’s a very pleasant place to work, and there’s a lot of benefits to that.
However, the way that MIT used to work back in the day, and not everything was roses then, but oh, okay, y- that people had industry experience. They had a knowledge of what was going on on the ground, and they were engineers, and they realized that formulas and reality don’t always align. And maybe we lost that somewhere in the ’80s and, or ’90s, but it does continue to be a problem, where back to Matthew’s point, if you’re going to use that amount of brain energy, put it to something that can help the world.
This isn’t necessarily helping the world That wraps up another episode of the Uptime: Wind Energy podcast. If today’s discussion sparked any questions or ideas, and I’m sure that it will, we’d love to hear from [00:30:00] you. Reach out to us on LinkedIn, and don’t forget to subscribe so you never miss an episode.
So for Yolonda, Rosemary, and Matthew, I’m Allen Hall, and we’ll see you here next week on the Uptime: Wind Energy podcast.
Renewable Energy
Trump Headed for Prison?
If any of us had been asked before Trump’s arrival on the political scene how we would feel if the United States government descended into abject corruption, became the disgrace of the civilized world, and wanted our opinion on the incarceration of an American president, we would have dismissed it with a laugh.
Now that it has actually happened, we say that removing Trump from office and sending him to prison is the very best outcome possible.
That’s why 70% of Americans and close to 100% of others in the developed world will rejoice the moment that Trump is no longer a figure in world events.
Renewable Energy
Cell Biology
Have you ever wondered why our bodies are in a particular shape, or why they have any shape at all, rather than resembling a bag of jelly?
I just the man met who, working in a research lab in Finland, discovered the “extracellular matrix,” a collection of proteins and carbohydrates to which all healthy cells must bind in order to stay alive, which provides the body’s structure.
This has relevance to cancer research, because those cells do not have to adhere to the matrix, which is why they move around inside the body, and ultimately metastasize, landing somewhere and divide rapidly.
I asked him if he is religious, i.e., if thought God created the extracellular matrix. He immediately replied no.
-
Climate Change11 months ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases11 months ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago
Bill Discounting Climate Change in Florida’s Energy Policy Awaits DeSantis’ Approval
-
Renewable Energy9 months agoSending Progressive Philanthropist George Soros to Prison?
-
Carbon Footprint2 years agoUS SEC’s Climate Disclosure Rules Spur Renewed Interest in Carbon Credits
-
Greenhouse Gases1 year ago
嘉宾来稿:探究火山喷发如何影响气候预测












