Would this be effective at smaller volumes? Could it get down to say the size of a washing machine for use at home?
Very unlikely. All the technologies involved work best at scale; for example, the area-to-volume ratio of the liquid gas storage vessel is a critical parameter to keep energy losses low.
The turbines would have to spin at very high speeds at those sizes to be efficient.
Very unlikely. All the technologies involved work best at scale; for example, the area-to-volume ratio of the liquid gas storage vessel is a critical parameter to keep energy losses low.