They claim 90% efficiency, so I doubt you can compare this to heating a container and them driving a stream engine afterwards.
I suspect they are here also utilizing geothermal heat and heatpumps which allows you to increase efficiency. If you heat water that is already quite hot, then you can get more energy back than you put in. Higher temperature differentials give better efficiency.
I suspect they are here also utilizing geothermal heat and heatpumps which allows you to increase efficiency. If you heat water that is already quite hot, then you can get more energy back than you put in. Higher temperature differentials give better efficiency.