5 ms·

https://www.forconstructionpros.com/concrete/article/10886050/ohios-first-largescale-wind-farm-uses-lafarge-cement-for-turbine-concrete-foundations https://www.

kragen 7y ago
https://www.forconstructionpros.com/concrete/article/10886050/ohios-first-largescale-wind-farm-uses-lafarge-cement-for-turbine-concrete-foundations https://www.forconstructionpros.com/concrete/article/1088605... is still 7 years ago, but it says they used 30,000 "tons" (probably about 27000 tonnes in modern units) of cement occupying 122500 "cubic yards" (94000 m³ in modern units) to support the 152 2-MW turbines of a 304 MW wind farm. That's 89 tonnes (though that number is probably wildly approximate) or 304 m³ per megawatt. This is a little more than the 190 m³/MW for nuclear plants cited by the 2007 NextBigFuture artcle, but a lot less than the 870 m³/MW for wind farms they cited. So, if concrete requirements for wind farms dropped by two thirds from 2007 to 2013, what do you suppose they are today?
- edhelas 7y ago
  Dropped by 2/3 ok. For a lifespan of, 20 years ? Again a power plant life expectancy is 3, maybe 4 times that. And you need to do the foundation once. You don't replace a wind turbine over a wind turbine, you need to redo the foundations (the concrete is constantly stressed and fragilized through the years), same for a power plant (also for security purposes). This doesn't count the concrete needed for the access roads and cables to connect everything. From the article "Lafarge also supplied 20,000 tons of Type I cement for soil stabilization of approximately 44 miles of roads". Let's try to do the maths with a modern power plant as well. Knowing that you produce more energy than in the 70' with modern turbines and we have bigger plans as well on smaller areas.

kragen 7y ago

https://www.forconstructionpros.com/concrete/article/10886050/ohios-first-largescale-wind-farm-uses-lafarge-cement-for-turbine-concrete-foundations https://www.forconstructionpros.com/concrete/article/1088605... is still 7 years ago, but it says they used 30,000 "tons" (probably about 27000 tonnes in modern units) of cement occupying 122500 "cubic yards" (94000 m³ in modern units) to support the 152 2-MW turbines of a 304 MW wind farm. That's 89 tonnes (though that number is probably wildly approximate) or 304 m³ per megawatt. This is a little more than the 190 m³/MW for nuclear plants cited by the 2007 NextBigFuture artcle, but a lot less than the 870 m³/MW for wind farms they cited. So, if concrete requirements for wind farms dropped by two thirds from 2007 to 2013, what do you suppose they are today?

edhelas 7y ago
Dropped by 2/3 ok. For a lifespan of, 20 years ? Again a power plant life expectancy is 3, maybe 4 times that. And you need to do the foundation once. You don't replace a wind turbine over a wind turbine, you need to redo the foundations (the concrete is constantly stressed and fragilized through the years), same for a power plant (also for security purposes). This doesn't count the concrete needed for the access roads and cables to connect everything. From the article "Lafarge also supplied 20,000 tons of Type I cement for soil stabilization of approximately 44 miles of roads". Let's try to do the maths with a modern power plant as well. Knowing that you produce more energy than in the 70' with modern turbines and we have bigger plans as well on smaller areas.