[nine_k]

This makes complete sense if you replace a power plant that produces electricity with an industrial process that produces heat, e.g. a blast furnace.

Then you can grab the waste CO₂ and turn it into something useful (ultimately liquid fuel, plastics, etc) by using the cheap solar energy, of which we often have a surplus at daytime.

This has the downside of only operating efficiently during sunshine, or needing a power transmission line from somewhere under sunshine currently (e.g. during local night).