ECO TLP Brings Concrete Foundations to Floating Wind

Nicole Johnson Murphy, CEO of ECO TLP, and Gordon Jackson join to discuss concrete floating wind foundations, production-line construction, and markets from Hawaii to Japan. 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! Welcome to Uptime Spotlight, shining Light on Wind. Energy's brightest innovators. This is the progress powering tomorrow. Allen Hall: Offshore wind obviously is a big deal right now. There's a lot of, countries looking at it and investigating it, doing it, but not really at scale yet. And this is where ECO TLP comes in and. Nicole, let's just start there with a background. What problem were you trying to solve when you started ECO TLP? Nicole Johnson-Murphy: Yeah, so, we were designing for, a site off of Hawaii in 2011, for the HECO RFP. And so we were designing for 300 meter water depth from the beginning. so we were always trying to find a way to work with the ports, with the vessel, with the infrastructure that was existing off Hawaii. And with, and that worked with Jones Act vessels. So we were always trying to meet that [00:01:00] requirement with, and meet the cost, try to, we saw there were much tighter margins in offshore wind than in oil and gas, for example, at that water depth. So we're trying to find something that was cost effective.  Allen Hall: Next question, obviously is what makes those deep water foundations so difficult? Gordon Jackson: It's the water depth, primarily, you need to put foundations down in, extremely deep water. and they're gonna be pretty flexible. so you're trying to control the amount of motion that you get at the surface through your, your deep water, facility. it's really. Really that challenge, and, the weight of components through the water depth, likes of chain would be completely impossible. in 300 meters of water. you need to use something that's a little bit lighter. Yeah, to mow you to the, to the seabed. Allen Hall: [00:02:00] Because it does seem a little odd just not to make the foundations taller, basically. More steel drive it down in, we know that process, we understand that process. It works offshore, near shore in a, lot of locations. But once you get to what depth as it becomes financially or engineering wise, impossible.  Gordon Jackson: For offshore wind, fixed, structures in, maybe a hundred meters of water are gonna be. Economic. they'll be costly compared to what's been done now because, of all the extra structure you need for the, for the deeper water. But, I think you'll see, a crossover between fixed and floating, around the, 70 to a hundred meter water mark. that's sort the range. Allen Hall: And that leads to the next question, which is. It's all financial, right? At some point, the numbers [00:03:00] don't work. If the cost of foundations don't come down, especially in fixed bottom offshore or floating offshore, we lose a lot of offshore wind resource. Nicole can you gimme a scale at what we're missing if we don't get to a more economical solution for floating offshore? Nicole Johnson-Murphy: So we've estimated for our market for, a very deep water market. So we now actually have a solution that goes across all water depths. So we're starting with, this, gravity based structure now with, and, Gordon's team has been really involved in that, development. And then now we can take that same slip form, concrete cylinder. Format and take it across all the water depths. so we basically can hit every water depth now for a very low cost. It's a very simple, just, local, regionally designed and built, system. We, crowdsource the labor and the inputs. and so we [00:04:00] try to, and we also try to give the procurement team of our clients their, an ability to do their job and, be able to bid out aspects of our design, across. Different vendors. So you always wanna give, in construction, you always wanna give, the procurement team a job to do so they can actually get that price, keep that price down on the installation.  Allen Hall: Yeah, that's a unique look that ECO TLP is putting to this problem. Which is moving away from steel, which is expensive obviously, and it's difficult to transport at times to a more localized solution, which is concrete. And thinking about the problem a little bit differently, does that open up a number of doors then in terms of the countries that can get involved in, floating or near shore, wind projects, but just because you're driving the cost down?  Nicole Johnson-Murphy: Absolutely. And I'll let Gordon speak to that.. He's worked. His whole career in offshore concrete. But I think it's, I think it's a, great, it's the only way we would do it. We actually have shipyards in our companies, our partners own [00:05:00] shipyards, and we, just would never probably ex try to create this many units across the world and scale and steel. We'd only do concrete.  Gordon Jackson: Yeah. My first concrete project broke the mold of how you do, construction of concrete offshore structures. it was entirely built within a dry dock and, After we'd gone on and delivered that project, that was in the late eighties. I spent the next 10 years, working on projects all around the world, looking at doing the same sort of thing in different countries. because you only needed, 10, 12 meters of water, at the shore and you could, build a structure and get it out there in the water. It really opened up the market for offshore concrete structures that, that, first project that we did.  Allen Hall: So using that first project as leverage and knowledge of how to do these things, how much advantage [00:06:00] does concrete give you over steel? Gordon Jackson: It's difficult to say because it bends country to country. And, quite often you're competing against, steel built in some, very low cost fabrication countries. so if you're in a high cost, high labor cost country, I worked in Australia, and the labor cost there was extremely high. So concrete wasn't particularly cheap, but the overall solutions that we came up with, were cheap. Allen Hall: So does that involve basically like slip forms or how are you, thinking about that problem? Because it's a huge engineering task and you only learn. By doing it on some level because all great plans, always run into trouble as soon as you try to implement them. So you took all that previous knowledge and then applied it to this problem, and now you have, basically [00:07:00]trimmed or, slimmed, the design down into, you have a, very economical model, even in more uneconomical economies because of labor laws and cost of labor and access and those kind of things. What does that look like now? And what's your thought process on, Hey, this is what it's gonna look like? Can we get, quayside how do we do this and how do we keep this thing simple? Gordon Jackson: The key thing is we're looking at, a production line approach, which has been, it's tried and tested for, for marine, concrete construction, construction of quay walls and and the we're using exactly that same system. We've just been tried and tested to create a production line of, ECO TLP units or ECO GBS units where we're building, onshore and where we're going from station to station, doing a task at each station. [00:08:00] So it's exactly like a production line, that you're be familiar with and, you load out the completed structure onto a barge, and then you. Submerge that barge and your structure floats off and that's, the real key to getting the, the economy from the concrete basis.  Nicole Johnson-Murphy: Yeah, and I'll say that the OpEX is really something we focus a lot on because it's not just what you're doing on the CapEx and the development and the port, it's actually that 30 year lifetime maintenance. And this is a, when you, we fully submerge our floater, which is basically inert in the ocean. It's, very eco-friendly with the ocean. There's no paint, there's no, maintenance on the floater over the lifespan. You're, monitoring those, the moorings and the, weight of any marine, buildup on those moorings and things like that. But generally it's a very low maintenance solution and it's very heavy and a comfortable car [00:09:00] ride for the turbine. It really has slow motions. it's, almost like a, a high skyscraper in the water. you're just the top of that skyscraper is moving a little bit. But you're, you're really giving it that comfortable, slow ride over its lifetime. It's not hitting a lot of turbulence, like a different type of floater.  Allen Hall: Yeah. It is a different concept, really, right? That you have this mass at the bottom and you have this mass at the top, which is the, cell on the wind turbine. And if you can design it just right, everything dampens becomes stable. Even in turbulent water. How long did it take you to figure out that aspect of the design? Because it does seem like a lot of projects hit a, an end point right there because the motion of the turbine is not good for the lifetime of the turbine.  Nicole Johnson-Murphy: We, look at it as a, kind of hybrid spar, TLP so, the original design came from my late father who was, who had designed Ekofisk for Phillips [00:10:00] petroleum in the early. Late sixties, And, so he'd come from oil and gas and he'd come from that concrete, construction background. And, he is very comfortable with it. And I think, Gordon, that's part of why I like working with Gordon 'cause Gordon has that same, long-term view on, these construction principles. And I think that,...