The study on which the article is based seems somewhat speculative.
The assumption for the full renewable scenario are the existence of the hydrogen economy. I'm quite positive about the potential of hydrogen but there are quite a few unsolved problems at the moment and it seems the hydrogen part of the energy transition has slowed down a bit.
Certainly the total cost of such a system is not well known at this time. So the cost calculation for the renewable scenario is quite uncertain - other energy storage tech might be more expensive.
The carbon capture calculation is based on the assumption that there is no other renewables and we go 100% capture.
This is not really that interesting an scenario, what matters more is the marginal costs of each technology at different points in the future.
In general a healthy dose of scepticism is warented when it comes to long term projections or cost of technologies, though or course policy does require we take a stab at it.
The assumption for the full renewable scenario are the existence of the hydrogen economy. I'm quite positive about the potential of hydrogen but there are quite a few unsolved problems at the moment and it seems the hydrogen part of the energy transition has slowed down a bit.
Certainly the total cost of such a system is not well known at this time. So the cost calculation for the renewable scenario is quite uncertain - other energy storage tech might be more expensive.
The carbon capture calculation is based on the assumption that there is no other renewables and we go 100% capture.
This is not really that interesting an scenario, what matters more is the marginal costs of each technology at different points in the future.
In general a healthy dose of scepticism is warented when it comes to long term projections or cost of technologies, though or course policy does require we take a stab at it.