Environment & Energy
Related: About this forumReplacing A Coal Plant Takes An Infinite Number Of Wind Turbines
Hate to spoil the article but this is why it takes an infinite number of windmills...
Coal generation also produces 84 kg of coal ash per MWh, so that coal plant produces about 265,000 tons of it a year. Wind generation doesnt produce any coal ash, or indeed anything like it, so an infinite number of wind turbines would be required.
From the start...
Coal is going away. What will it take to replace all of the things it provides us with? An infinite number of wind turbines would be required to replace everything a coal plant gives us.
If it was just the electricity, only 120 to 350 modern wind turbines would be required, but thats just the start.
These are averages and capacity factor-based. Its an approximation. Capacity factor is the percentage of a years potential maximum generation that is actually achieved. If a generation unit could generate 100 MWh but actually generates 70 MWh thats a capacity factor of 70%. Its based on a demand, market conditions, supply, maintenance, and the like.
As coal plants are shutting down, theyve also been dropping in capacity factor, and now have an average of under 50%. Well use 50% as our capacity factor for coal.
In 2016, there were 381 coal plants with just under 800 generating units. The average coal plant was running around 720 MW of capacity. Well use 720 MW of capacity for coal as the basis.
720 MW of capacity running 24/7/365 with a capacity factor of 50% would generate about 3.15 TWh of electricity in a year.
The average capacity factor for modern wind turbines in the US is 41.9%. The average size of new wind turbines in the USA is 2.43 MW in capacity.
The first question is how many wind turbines would be required to generated 3.15 TWh of electricity.
3.15 TWh divided by 2.43 MW capacity divided by 24 hours divided by 365 days divided by a capacity factor of 41.9% gives us about 353 wind turbines.
So the first answer is that just over 350 wind turbines are required to replace a coal generation plant which likely has 23 generating units. That means that about 120175 wind turbines are required to replace a single generating unit.
So far, so good. But coal plants do more than provide electricity. What else do they provide, and can wind turbines provide that too?
edited to add link to article - https://cleantechnica.com/2020/11/27/replacing-a-coal-plant-takes-an-infinite-number-of-wind-turbines/
Laf.La.Dem.
(2,940 posts)Very interesting
Finishline42
(1,091 posts)Thought one of the naysayers from DU was the author!
Hokie
(4,285 posts)Good article. Thanks for posting.