Using “waste heat” from a power plant to do useful stuff sounds really straightforward to somebody like me, who has never had to do it.
Then I read this long article in Biomass Magazine about the Burgess Biopower Plant in Berlin, which has a lot of adjacent land for other companies to come and get its “free” heat. They’re building a big ($25 million) hydroponic greenhouse to use perhaps 10% of it and is looking at melting snow on city sidewalks to use 10% more – and maybe some for district heating.
It’s all non-trivial. Like so many straightforward-seeming things in life.