Re: Corporate Media Propaganda Strikes Again
CCGTs still have "cooling towers". They just have gert big fans in them now, which makes them physically MUCH smaller, and with less visible vapour - I guess because the vapour exits at higher temperature, and you only see it when it is condensing. I saw them on a school trip to Didcot Power Station in 2003. The plant manager told us they were -less- efficient than the old convection ones, but he was probably talking about energy, rather than water.
They may be a -little- more water efficient (the latent heat of evaporation is the same, so i'm not sure if they are), but the stat referenced by the guardian came from something called the Ends Report (which is paywalled, I can't check it). Per the Graun: Analysis by the Ends Report revealed 47bn kilolitres (kl) of water was extracted from the environment in England in 2023. Electricity generation took 26bn kl, public water supply took 9.2bn kl and agriculture took 2bn kl.
I.e. currently over 50% of water abstraction apparently goes on power generation - five times as much as is used by the public water supply. If AI wants to add 50GW say of baseload to our overloaded grid (baseload about 25GW currently), that would mean more than doubling the amount of CCGTs (or building ten times as many Nuclear plants as we have) meaning something like another 50bn kilolitres (aka tonnes) of water use per year, pretty much doubling the country's water use.
BTW, Did you mean to add something at the end of your post? It ended with a colon.
Yes, green self-sufficiency would be great, but it can't support baseload (i.e. 24/7 load) because long-duration storage past a few hours is infeasible at Gigawatt scales. The best LDES technology we have is pumped hydro, but unless you are prepared to cut the top off Ben Nevis to build a giant lake in the sky, it's not going to happen. And to do all that just for the sake of AI slop would be a travesty. We're better off without it.