"Clean" Coal Will Need Clean Water: Billions of Gallons More a Day

The National Energy Technology Laboratory of the Department of Energy recently issued a report that examines future freshwater availability to run power plants in the United States. How much water will coal-fired electricity generating plants need in 2030? The short answer: a lot.
Will "clean coal" plants require even more water than traditional coal plants to run? You bet, a lot more.
The NETL report is called Estimating Freshwater Needs to Meet Future Thermoelectric Generation Requirements, and it's about as easy to read as the title. Take a look at chart #52, above. It shows five cases (across the bottom axis) and three scenarios, shown in three colors. Here's what the report says about the chart.
The Case 2 data in Figure 2 shows that in 2030, 8.2 BGD of water consumption is projected for all thermoelectric plants without carbon capture deployment. Scenario 1 shows by deploying carbon capture technologies to the scrubbed coal-fired fleet, an additional 2.9 BGD would be required, resulting in a total of 11.1 BGD. If Scenario 2 is applied, 0.6 BGD would be added to Scenario 1, resulting in a total of 11.7 BGD. Scenario 3 would add 1.4 BGD to scenario 1 resulting in a total water consumption of 12.5 BGD for Scenario 3.
Got that? The whole report is like that. Makes you think they wanted to hide something in plain view.
Here's my shot at the inescapable take-away: no matter what assumptions you make (cases 1-5), it's going to take a whole lot more water to run "clean" coal plants (everything above the dark blue part of the columns).
How much more water? Looks like anywhere from 4 to 6 billion gallons of freshwater a day.
So in addition to the need for siting clean coal plants near geological formations that can accept storage of massive amounts of carbon -- or building CO2 pipelines -- there's the need for massive amounts of water, which everywhere is already dwindling.
So now we can add yet another cost to clean coal plants -- water -- making them an even more questionable investment than ever.
It sure would have been helpful if NETL had mapped places where water might be available for coal plants. We know, for example, that would be nowhere in the vicinity of the Colorado river, already overtaxed. But where? And how does that line up with geologic formations favorable for carbon sequestration? And how does that line up against where new power plants are needed?
Thank you National Energy Technology Laboratory for clarifying the answers we need so well.











thanks
Wonderful, informative website! Thank you for letting me know about it. I'll visit it often. Sonja Coryat
www.sonjarants.blogspot.com
Post new comment